Journal articles on the topic 'Indoor Horticulture'
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Solis-Toapanta, Elisa, Paul Fisher, and Celina Gómez. "Growth Rate and Nutrient Uptake of Basil in Small-scale Hydroponics." HortScience 55, no. 4 (April 2020): 507–14. http://dx.doi.org/10.21273/hortsci14727-19.
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To identify practices that may simplify the use of small-scale hydroponic systems for indoor gardening, we compared two nutrient solution management treatments for basil (Ocimum basilicum) production. Experiments were conducted for 8 weeks to evaluate the effect of biweekly replacement of the nutrient solution (W) vs. biweekly fertilizer addition without nutrient solution replacement (W/O) on growth and nutrient uptake of basil ‘Genovese Compact’ grown in either a greenhouse or an indoor environment. Greenhouse day/night temperature was 29/24 ± 4 °C, relative humidity (RH) was 65 ± 4%, and daily light integral (DLI) was 26.1 mol·m‒2·d‒1. The indoor environment had a constant ambient temperature of 21 °C, RH of 65%, and DLI of 9 mol·m‒2·d‒1 provided by broadband white lamps. Four plants were grown in 7.6-L replicate hydroponic systems, with 178 mg·L‒1 N from a complete nutrient solution in two experimental runs. Shoot fresh and dry mass, leaf number, and leaf area showed an increasing quadratic trend over time when plants were grown in the greenhouse. In contrast, growth over time was linear for plants grown indoors. Within each environment, solution management treatment did not affect growth, indicating that the simpler W/O strategy was adequate under these conditions. Plants grown in the greenhouse required more frequent refill water applications compared with indoors, which resulted in three to four times more refill water applied. Because indoor-grown plants had a decreased growth rate, nutrient uptake rate, and volume of water applied compared with plants grown in the greenhouse, electrical conductivity (EC) for the W/O treatment increased over time. Final nutrient solution concentration was highest for indoor-grown plants under the W/O treatment, and final tissue nutrient concentration was higher for plants grown indoors compared with the greenhouse. Final nutrient uptake (dry mass × nutrient concentration) was higher for plants grown in the greenhouse rather than indoors. Considering that EC increased in the solution of indoor-grown plants under W/O, an appropriate strategy using this treatment would require reducing fertilizer input indoors. To refine simple and robust fertilizer management strategies for indoor gardeners, further research is needed to test variables such as different plant species, cultivars, and water qualities.
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Gooch, N. J., Pascal Nzokou, and Bert M. Cregg. "Effect of Indoor Exposure on the Cold Hardiness and Physiology of Containerized Christmas Trees." HortTechnology 19, no. 1 (January 2009): 72–77. http://dx.doi.org/10.21273/hortsci.19.1.72.
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Containerized conifers are increasingly marketed and used as live Christmas trees worldwide. However, prolonged exposure to indoor conditions may reduce cold hardiness. We examined physiological and morphological changes of three species black hills spruce (Picea glauca), balsam fir (Abies balsamea), and douglas fir (Pseudotsuga menziesii var. glauca) subjected to in-home conditions for 10 and 20 days. Shoot cuttings were subjected to artificial freeze testing (AFT) and the physiological and morphological changes were evaluated by chlorophyll fluorescence, bud mortality, and needle damage. After 7 days indoors, bud temperature at 50% lethality (LT50) was −24.5 °C for douglas fir, −23.5 °C for black hills spruce, and −22.5 °C for balsam fir. After 20 days indoors, bud LT50 increased to −18 °C for black hills spruce and balsam fir, and −21 °C for douglas fir. The effect of the indoors exposure on needle damage was very limited for black hills spruce and balsam fir; however, severe needle damage was apparent on douglas fir even at just 3 days of indoor exposure (LT50 = −21 °C). This negative impact worsened with indoor exposure time with LT50 for after 20 days of indoor exposure at −7 °C. Chlorophyll fluorescence values followed a similar trend with needle damage with black hills spruce and balsam fir showing no difference, while douglas fir values were significantly affected. These results confirm the hypothesis that live trees kept indoors for extended periods progressively deharden and become very sensitive to cold damage when moved outdoors following the indoor exposure. However, whole plant survival after transplantation in the field did not corroborate results obtained from the AFT. Further studies are needed to investigate the potential causes of the high transplantation mortality following the display treatments.
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Gibson, Kristin E., Alexa J. Lamm, Fallys Masambuka-Kanchewa, Paul R. Fisher, and Celina Gómez. "Identifying Indoor Plant Propagation Research and Education Needs of Specialty Crop Growers." HortTechnology 30, no. 4 (August 2020): 519–27. http://dx.doi.org/10.21273/horttech04622-20.
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There are economic and knowledge-based challenges that must be addressed for indoor farms to be viable in the United States despite their potential benefits. A mixed-methods approach was used to identify the needs of specialty crop growers and stakeholders interested in or currently using indoor propagation environments to grow seedlings, cuttings, and tissue-cultured plants. An online survey evaluated specialty crop growers’ current use of indoor plant propagation environments and their needs related to indoor plant propagation. A focus group was then conducted to further understand the needs for indoor plant propagation by stakeholders. Industry participants were largely motivated to adopt indoor propagation environments to reduce crop losses (“shrinkage”), increase productivity per unit of land area, ensure faster germination or rooting, improve plant quality, and profit from anticipated economic benefits. Research and education priority areas identified by stakeholders included economic costs and benefits (including capital investment and energy costs), improved crop quality, production time, uniformity, reduced shrinkage, and strategies to improve light management indoors. Based on the results, research efforts must determine and prioritize the most important economic considerations and production advantages to fill important gaps in knowledge about indoor plant propagation.
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Mitchell, Cary A. "History of Controlled Environment Horticulture: Indoor Farming and Its Key Technologies." HortScience 57, no. 2 (February 2022): 247–56. http://dx.doi.org/10.21273/hortsci16159-21.
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The most recent platform for protected horticultural crop production, with the shortest history to date, is located entirely indoors, lacking even the benefit of free, natural sunlight. Although this may not sound offhand like a good idea for commercial specialty-crop production, the concept of indoor controlled-environment plant growth started originally for the benefit of researchers—to systematically investigate effects of specific environmental factors on plant growth and development in isolation from environmental factors varying in uncontrolled ways that would confound or change experimental findings. In addition to its value for basic and applied research, it soon was discovered that providing nonlimiting plant-growth environments greatly enhanced crop yield and enabled manipulation of plant development in ways that were never previously possible. As supporting technology for indoor crop production has improved in capability and efficiency, energy requirements have declined substantially for growing crops through entire production cycles in completely controlled environments, and this combination has spawned a new sector of the controlled-environment crop-production industry. This article chronicles the evolution of events, enabling technologies, and entrepreneurial efforts that have brought local, year-round indoor crop production to the forefront of public visibility and the threshold of profitability for a growing number of specialty crops in locations with seasonal climates.
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Collins, Claudia C., and Angela M. O'Callaghan. "The Impact of Horticultural Responsibility on Health Indicators and Quality of Life in Assisted Living." HortTechnology 18, no. 4 (January 2008): 611–18. http://dx.doi.org/10.21273/horttech.18.4.611.
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This study used quantitative and qualitative methods to investigate the impact of indoor gardening on elderly residents of a low-income assisted living facility over a 4-week period. Mastery, self-rated health, and self-rated happiness were pre-, post-, and post-post measured to evaluate whether a short-term introduction of indoor gardening that involved individual plant-care responsibility would improve these measures that are predictive of health and quality of life. Eighteen residents participated in four 2-hour interactive horticulture classes taught by a social horticulturist and a sociologist. Class members showed a significant increase in mastery, self-rated health, and self-rated happiness. The results of this study indicate that a basic horticultural activity, as simple as learning how to maintain a houseplant and taking individual responsibility for one, can have a short-term positive impact on the quality of life and on primary indicators of future health outcomes of older adults residing in assisted living facilities.
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Yamori, Namiko, Yoriko Matsushima, and Wataru Yamori. "Upward LED Lighting from the Base Suppresses Senescence of Lower Leaves and Promotes Flowering in Indoor Rose Management." HortScience 56, no. 6 (June 2021): 716–21. http://dx.doi.org/10.21273/hortsci15795-21.
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In indoor environments such as hotels, the light intensity is generally insufficient for managing plants, and flower buds often fail to open. Lamps placed above (downward lighting) take up space. We assessed the applicability of lighting from underneath (upward lighting) for the indoor management of roses. We grew plants indoors in dim light for 2 weeks under three conditions: 1) without supplemental lighting, 2) with downward light-emitting diode (LED) lighting, and 3) with LED lighting. We quantified photosynthetic components (chlorophyll and rubisco) and the maximum quantum yield of photosystem II (Fv/Fm, an indicator of plant health) to determine the effects of each treatment on the quality and photosynthetic abilities of the leaves. We determined the ratios of dead and opened flower buds to elucidate the effects of supplemental lighting on flower bud maturation. Management without supplemental lighting decreased the number of flowers and resulted in lower-leaf senescence. Downward LED lighting promoted blooming but also resulted in lower-leaf senescence. However, upward LED lighting promoted blooming and maintained the photosynthetic abilities of the leaves, including the lower leaves. This study shows a strong case for using upward LED lighting in appropriate settings for indoor plant management and LED-based horticulture.
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Gómez, Sofía, and Celina Gómez. "Evaluating the Use of Biostimulants for Indoor Hydroponic Lettuce Production." HortTechnology 32, no. 4 (August 2022): 348–55. http://dx.doi.org/10.21273/horttech05045-22.
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Biostimulant products have various reported benefits for plant production in the field or using hydroponic systems in protected structures. However, limited information is available describing their potential use for indoor farming applications. Considering that lettuce (Lactuca sativa) is one of the most popular crops produced in commercial indoor farms, the objective of this study was to compare growth and quality of lettuce grown indoors using nine biostimulant products derived from humic substances, amino acids, hydrolyzed proteins, or seaweed extracts. ‘Monte Carlo’, ‘Fairly’, and ‘Lalique’ lettuce were grown hydroponically for 30 to 33 days under a daily light integral, day/night temperature, relative humidity, and carbon dioxide concentration of ≈13 mol·m‒2·day‒1, 22/21 °C, 70%, and 800 µmol·mol‒1, respectively. There were no positive effects from using any of the biostimulant products evaluated in our study as growth (leaf area, leaf number, shoot diameter, and shoot and root dry weight), yield (shoot fresh weight), and quality (bolting, tipburn index, leaf color, and SPAD index) of treated plants were generally similar to those from the untreated control. Applications from one seaweed extract caused slight negative growth effects, possibly due to phytotoxicity. Cultivar differences showed that Fairly plants had the highest susceptibility to tipburn and bolting, and none of the biostimulant products countered these symptoms. Overall, the products evaluated provided marginal advantages for indoor hydroponic lettuce production.
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Thomas, Creighton K., Kwang Jin Kim, and Stanley J. Kays. "Phytoremediation of Indoor Air." HortScience 50, no. 5 (May 2015): 765–68. http://dx.doi.org/10.21273/hortsci.50.5.765.
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Volatile organic compounds (VOCs) in homes and offices represent a potentially serious health problem for exposed individuals. While certain indoor plants have been shown to remove VOCs in small test chambers, the results have not consistently translated to larger, more complex structures. We report the results of a mathematical model that assesses the effect of plants on the removal of benzene or other VOCs in buildings, incorporating the primary variables modulating indoor air VOC concentration. Building air volume, amount of plant material, VOC concentration and air exchange, VOC emanation, and plant phytoremediation rates can be altered over ranges reported in the literature, clarifying the relationship among these parameters and thereby identifying the most appropriate interior air remediation options. The results indicate existing published phytoremediation rates determined using small test chambers are far higher than can be achieved with static potted plants in buildings, and facilitated air movement through the plant media will most likely be essential for phytoremediation to be a viable means of improving indoor air quality.
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Rakut’ko, Sergei A. "Conceptual Framework of Energy-and-Ecology of Indoor Plant Lighting." Agricultural Machinery and Technologies 12, no. 6 (December 24, 2018): 38–44. http://dx.doi.org/10.22314/2073-7599-2018-12-6-38-44.
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Abstract.To increase the efficiency of horticulture, the technology of plant cultivation under artificial lighting, i.e. indoor plant lighting, is widely used. The author proposes to expand the range of issues considered in this field and highlight the energy-and-ecology of horticulture (EEH) as a scientific area located at the junction of power engineering and technical subjects, plant physiology, and ecology. (Research purpose) To develop a conceptual framework of the energy-and-ecology of horticulture. (Materials and methods) The object of EEH research is an artificial bioenergetic system of horticulture (ABSH), i.e. a combination of living organisms and technological equipment in a plant growing facility. A mathematical description of the regularities of transferring a substance in horticulture is produced on the basis of a hierarchical model of ABSH. The subject of the EEH study is the regularities of the transformation of matter and energy flows in ABSH. (Results and discussion) The author has determined some specific indicators of energy-ecological compatibility and obtained an expression for determining the energy-ecological coefficient of horticulture through its technological indicators. The paper offers an interpretation of the term "energy-and-ecology of horticulture" as a property of the technological process of plant growing in artificial conditions to meet the requirements of energy efficiency and environmental friendliness. It is shown that an approach based on the concept of best available technologies (BAT) can be applied to the indoor plant lighting. An expression for the quantitative assessment of the energy-ecological parameter in terms of the proximity of the development trajectories of ABSH in a state-space has been obtained. The author proposes an algorithm for BAT forming to be applied in indoor plant lighting. (Conclusions) For the first time, the author raises a question about the development of structural elements of the BAT formation algorithm in lighting horticulture in terms of energy-ecological indicators as an integrative optimality criterion of the system. The author has developed energy audit techniques to optimize the process of plant growing according to the criterion of minimal deviations of energy-ecological performance by varying the lighting parameters, environmental conditions and other factors. Complex implementation of energy- and ecological technologies of indoor plant lighting will allow increasing the efficiency of the production process, reducing the energy intensity while improving the quality of products and ensuring the environmental friendliness of production.
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Shibusawa, Naoe, Shigeru Matsuyama, and Ryo Ohsawa. "The influence of the cultivation environment on the fragrance of cyclamens." Horticultural Science 45, No. 3 (September 5, 2018): 145–55. http://dx.doi.org/10.17221/110/2017-hortsci.
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The scent of scented cyclamen flowers weakens when the plants are displayed for long periods, and this phenomenon is affected by the environment in which the plants are displayed. Counteracting environmental effects on scent intensity requires an understanding of floral scent emission during display. Here, we used gas chromatography-mass spectrometry and sensory analysis to evaluate the influence of light intensity on floral scent emission from scented cyclamens kept indoors and in a greenhouse. For the greenhouse cyclamen, odour intensity was nearly constant throughout the study period. In contrast, the odour intensity of the indoor plants had decreased by 13 days after flowering, and the odour intensities of the indoor and greenhouse cyclamen differed significantly. Rank correlation analysis showed a positive correlation between odour intensity as determined by sensory analysis and the total amount of volatile compounds released as determined by gas chromatography-mass spectrometry. That is, the sensory analysis results could be explained in terms of the emission amounts of odour compounds.
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Chang, Chen-Yen, and Ping-Kun Chen. "Human Response to Window Views and Indoor Plants in the Workplace." HortScience 40, no. 5 (August 2005): 1354–59. http://dx.doi.org/10.21273/hortsci.40.5.1354.
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The purpose of this paper was to report the effects of window views and indoor plants on human psychophysiological response in workplace environments. The effects of window views and indoor plants were recorded by measuring participant's electromyography (EMG), electroencephalography (EEG), blood volume pulse (BVP), and stateanxiety. Photo Impact 5.0 was used to simulate the environment in an office, where six conditions were examined: 1) window with a view of a city, 2) window with a view of a city and indoor plants, 3) window with a view of nature, 4) window with a view of nature and indoor plants, 5) office without a window view, and 6) office without a window view and indoor plants. Participants were less nervous or anxious when watching a view of nature and/or when indoor plants were present. When neither the window view nor the indoor plants were shown, participants suffered the highest degree of tension and anxiety.
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Kim, Hyojin, Ho-Hyun Kim, Jae-Young Lee, Yong-Won Lee, Dong-Chun Shin, Kwang-Jin Kim, and Young-Wook Lim. "Evaluation of Self-assessed Ocular Discomfort among Students in Classrooms According to Indoor Plant Intervention." HortTechnology 26, no. 4 (August 2016): 386–93. http://dx.doi.org/10.21273/horttech.26.4.386.
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A cohort of sixth grade students at two newly constructed elementary schools in Seoul, South Korea, performed a self-assessment of ocular discomfort symptoms in association with indoor air quality (IAQ) by indoor plant intervention from early June to mid-Oct. 2011. Indoor plant intervention made little difference in air temperature and relative humidity, but stabilized the increasing levels of carbon dioxide. The indoor concentrations of formaldehyde and ethylbenzene showed little difference, but those of toluene and xylene showed a decreasing trend in classrooms with indoor plants. The participants in classrooms without indoor plants exhibited an increase in ocular discomfort symptoms at School A and a decrease in symptoms at School B; those in classrooms with indoor plants demonstrated a decrease in frequency at both schools. The variation of symptom severity did not follow a clear trend. Participants assessed their symptom severity of ocular discomfort with four options from three points for frequent occurrence to zero points for no occurrence. Among participants in classrooms without indoor plants, symptom severity significantly worsened at both schools as the scores increased from 1.96 to 2.17 at School A and from 2.27 to 2.34 at School B; among those in classrooms with indoor plants, symptom severity significantly lessened at School A and slightly worsened at School B as the scores decreased from 2.33 to 1.98 at School A and increased from 2.35 to 2.42 at School B. After spending the experimental duration in classrooms without indoor plants at both schools, 34.8% of participants at School A and 33.3% of participants at School B perceived their symptom severity as having increased. At Schools A and B, indoor plants decreased the frequency of participants experiencing an increase of symptom severity by 13.0% and 9.7%, and increased the frequency of participants reporting decrease of symptom severity by 34.8% and 22.6%.
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Piovene, Chiara, Francesco Orsini, Sara Bosi, Rabab Sanoubar, Valeria Bregola, Giovanni Dinelli, and Giorgio Gianquinto. "Optimal red:blue ratio in led lighting for nutraceutical indoor horticulture." Scientia Horticulturae 193 (September 2015): 202–8. http://dx.doi.org/10.1016/j.scienta.2015.07.015.
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Gómez, Celina, Megha Poudel, Matias Yegros, and Paul R. Fisher. "Radiation Intensity and Quality Affect Indoor Acclimation of Blueberry Transplants." HortScience 56, no. 12 (December 2021): 1521–30. http://dx.doi.org/10.21273/hortsci16189-21.
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The objectives were to characterize and compare shrinkage (i.e., transplant loss) and growth of tissue-cultured blueberry (Vaccinium corymbosum) transplants acclimated in greenhouses or indoors under 1) different photosynthetic photon flux densities (PPFDs) (Expt. 1); or 2) spectral changes over time using broad-spectrum white (W; 400 to 700 nm) light-emitting diodes (LEDs) without or with red or far-red (FR) radiation (Expt. 2). In Expt. 1, ‘Emerald’ and ‘Snowchaser’ transplants were acclimated for 8 weeks under PPFDs of 35, 70, 105, or 140 ± 5 µmol·m‒2·s‒1 provided by W LED fixtures for 20 h·d−1. In another treatment, PPFD was increased over time by moving transplants from treatment compartments providing 70 to 140 µmol·m‒2·s‒1 at the end of week 4. Transplants were also acclimated in either a research or a commercial greenhouse (RGH or CGH, respectively). Shrinkage was unaffected by PPFD, but all transplants acclimated indoors had lower shrinkage (≤4%) than those in the greenhouse (15% and 17% in RGH and CGH, respectively), and generally produced more shoot and root biomass, regardless of PPFD. Growth responses to increasing PPFD were linear in most cases, although treatment effects after finishing were generally not significant among PPFD treatments. In Expt. 2, ‘Emerald’ transplants were acclimated for 8 weeks under constant W, W + red (WR), or W + FR (WFR) radiation, all of which provided a PPFD of 70 ± 2 μmol·m−2·s−1 for 20 h·d−1. At the end of week 4, a group of transplants from WR and WFR were moved to treatment compartments with W (WRW or WFRW, respectively) or from W to a research greenhouse (WGH), where another group of transplants were also acclimated for 8 weeks (GH). Shrinkage of transplants acclimated indoors was also low in Expt. 2, ranging from 1% to 4%. In contrast, shrinkage of transplants acclimated in GH or under WGH was 37% or 14%, respectively. Growth of indoor-acclimated transplants was generally greater than that in GH or under WGH. Although growth responses were generally similar indoors, plants acclimated under WFR had a higher root dry mass (DM) and longer roots compared with GH and WGH.
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Schoenefeldt, Henrik. "The Crystal Palace, environmentally considered." Architectural Research Quarterly 12, no. 3-4 (December 2008): 283–94. http://dx.doi.org/10.1017/s1359135508001218.
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In the nineteenth century, horticulturists such as John Claudius Loudon and Joseph Paxton, aware of the new environmental possibilities of glasshouses that had been demonstrated in the context of horticulture, contemplated the use of fully-glazed structures as a means to creating new types of environments for human beings. While Loudon suggested the use of large glass structures to immerse entire Russian villages in an artificial climate, Henry Cole and Paxton envisioned large-scale winter parks, to function as new types of public spaces. These indoor public spaces were intended to grant the urban population of London access to clean air, daylight and a comfortable climate. Although glasshouses had only been experienced in the immediate context of horticulture, designed in accordance with the specific environmental requirements of foreign plants, rather than the requirements of human comfort and health, they were perceived as a precedent for a new approach to architectural design primarily driven by environmental criteria. The environmental design principles of horticulture were discussed extensively in nineteenth-century horticultural literature such Loudon's Remarks on the Construction of Hothouses (1817), Paxton's Magazine of Botany (1834-49) and the Transactions of the Horticultural Society of London (1812-44). Since the purpose of glasshouses was to facilitate the cultivation of an increasing variety of foreign plants in the temperate climate of Northern Europe, the creation of artificial climates tailored to the specific environmental needs of plants became the primary object of the design.
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Rihn, Alicia, Hayk Khachatryan, Benjamin Campbell, Charles Hall, and Bridget Behe. "Consumer Response to Novel Indoor Foliage Plant Attributes: Evidence from a Conjoint Experiment and Gaze Analysis." HortScience 50, no. 10 (October 2015): 1524–30. http://dx.doi.org/10.21273/hortsci.50.10.1524.
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A rating-based conjoint experiment combined with eye-tracking analysis was used to investigate the effect of plant attributes on consumer purchase likelihood for indoor foliage plants. The experiment assessed the effects of plant type (Dracaena marginata Lam., Guzmania lingulata, or Spathiphyllum wallisii Regel), volatile organic compound (VOC) removal capacity (high, low, or none specified), price ($10.98–14.98/plant), production method [certified organic, organic production (not certified), or conventional], and origin (in-state, domestic, or imported) on consumer preferences. An ordered logit model was used to analyze the data. Organic production methods, in-state origin, domestic origin, and high VOC removal increased participants’ purchase likelihood. Visually attending to the highest price point ($14.98) increased consumers’ purchase likelihood. Age, gender, child (<12 years), pet, relationship status, education, and ethnicity affected participants’ purchase likelihood for indoor foliage plants. Purchasing barriers for indoor foliage plants are also discussed. Results have implications for indoor foliage plant growers and retailers as they produce, promote, and sell their products.
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Solis-Toapanta, Elisa, Andrei Kirilenko, and Celina Gómez. "Indoor Gardening with Hydroponics: A Reddit Community Analysis to Identify Knowledge Gaps." HortTechnology 30, no. 3 (June 2020): 346–55. http://dx.doi.org/10.21273/horttech04574-20.
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Social media platforms such as Reddit, centered on user-generated, anonymous discussions, can facilitate the exchange of information and resources across niche online communities known as “subreddits.” Using data mining tools and content analysis methods, our objectives were to identify recurring questions and characterize comment (“response”) accuracy from four subreddits focused on hydroponic indoor gardening (r/hydro, r/Hydroponics, r/UrbanFarming, and r/Aerogarden). A total of 1617 original posts (OPs) were classified into one of ten topics and 4891 primary responses were analyzed for accuracy. The three topics with the most OPs (production systems, plant lighting, and root-zone environment), which accounted for 50% of the total OPs, were subcategorized and inductively analyzed. Most posts in the analyzed subreddits related to confusion regarding the design and implementation of appropriate hydroponic production systems. In addition, misinformation about plant lighting is a major part of discussions about growing plants indoors. There are also knowledge gaps regarding nutrient solution management, particularly about fertilizer formulation, pH balance, and on the impact that solution temperature has on plant growth and development. In general, there were no differences among response accuracy for all topics included in our analysis. However, regardless of topic, responses for most OPs had less than 50% accuracy, which demonstrates that misinformation can be disseminated in social media platforms such as Reddit. As suggested by the results of this study, targeted, open access research and outreach efforts offer an opportunity to address knowledge gaps among consumers interested in indoor gardening.
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Raanaas, Ruth Kjærsti, Grete Grindal Patil, and Terry Hartig. "Effects of an Indoor Foliage Plant Intervention on Patient Well-being during a Residential Rehabilitation Program." HortScience 45, no. 3 (March 2010): 387–92. http://dx.doi.org/10.21273/hortsci.45.3.387.
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Effects of an indoor plant intervention in a Norwegian rehabilitation center were assessed in a quasi-experiment. During a 2-year period, coronary and pulmonary patients (N = 282) completed self-report measures of health, subjective well-being, and emotion on arrival, after 2 weeks, and at the end of a 4-week program. The intervention involved the addition of indoor plants for the second year. On average, patient physical and mental health improved during the program, but the addition of plants did not increase the degree of improvement. Subjective well-being did, however, increase more in patients who went through their program after the addition of plants, although the effect was only apparent in the pulmonary patients. The patients reported more satisfaction with indoor plants and the interior generally after the intervention. Room for the intervention to affect outcomes may have been limited by the well-designed interior and the center's location in a scenic mountain area, but these favorable features of the context apparently did not negate the potential for indoor plants to contribute to patient well-being.
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Keene, S. A., T. N. Kalk, D. G. Clark, T. A. Colquhoun, and H. R. Moskowitz. "Indoor plant toxicity concerns some consumers©." Acta Horticulturae, no. 1212 (September 2018): 361–66. http://dx.doi.org/10.17660/actahortic.2018.1212.83.
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Bringslimark, Tina, Terry Hartig, and Grete Grindal Patil. "Psychological Benefits of Indoor Plants in Workplaces: Putting Experimental Results into Context." HortScience 42, no. 3 (June 2007): 581–87. http://dx.doi.org/10.21273/hortsci.42.3.581.
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Laboratory experiments and quasi-experimental field studies have documented beneficial effects of indoor plants on outcomes such as psychophysiological stress, task performance, and symptoms of ill health. Such studies have taken an interest in the value of indoor plants in work settings, but they typically have not considered how the effects of plants might compare with effects of other workplace characteristics. The present study makes an initial attempt to situate the potential benefits of indoor plants in a broader workplace context. With cross-sectional survey data from 385 Norwegian office workers, we used hierarchical regression analyses to estimate the associations that plants and several often-studied workplace factors have with perceived stress, sick leave, and productivity. Other variables included in our models were gender, age, physical workplace factors (e.g., noise, temperature, lighting, air quality), and psychosocial workplace factors (demands, control, social support). After controlling for these variables, the number of indoor plants proximal to a worker's desk had small but statistically reliable associations with sick leave and productivity. Although small, such associations can have substantial practical significance given aggregation over the large number of office workers over time.
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Behe, Bridget K., Elizabeth H. Moore, Arthur Cameron, and Forrest S. Carter. "Repositioning Selected Herbaceous Perennials as Indoor Flowering Potted Plants Using Perceptual Mapping." HortScience 38, no. 3 (June 2003): 460–64. http://dx.doi.org/10.21273/hortsci.38.3.460.
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The U.S. wholesale market for flowering potted plants, valued at $701 million in 2000, is growing much slower than the $2.1 billion bedding plant market, indicating the product life-cycle of the former may have matured. A mature product yields little profit. Customers who purchase flowering potted plants for indoor enjoyment may have expectations about them, including that plant life is finite and there is no opportunity for outdoor use. Because scientists have discovered how to force selected perennials to flower, marketers may reposition them as indoor flowering potted plants, creating a new product and potentially stimulating sales of this lagging floral category. One method for relating customer perceptions of new products to familiar ones is perceptual mapping, which shows how consumers implicitly categorize products. Defining how consumers perceive the relationships between the selected flowering plants enables marketers to select the best opportunities for product positioning, merchandising, and pricing. We surveyed 200 self-selected visitors at a Michigan flower show in Apr. 2000 to determine their uses for, preferences for, and perceptions of three traditional indoor flowering potted plants and six traditional outdoor perennials. Perceptions were recorded on a seven-point scale. Squared Euclidean distances were calculated to derive the map in which two major dimensions emerged: use (indoor/outdoor) and flower color. Campanula carpatica Jacq. `Blue Clips' and Oxalis crassipes Urb. were mapped centrally, indicating participants had no strong perceptions for how these plants should be used. This suggests that Campanula and Oxalis have the greatest potential to be positioned for dual indoor and outdoor enjoyment, which may also yield some enhanced profitability.
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Runkle, E. S., Q. Meng, and Y. Park. "LED applications in greenhouse and indoor production of horticultural crops." Acta Horticulturae, no. 1263 (November 2019): 17–30. http://dx.doi.org/10.17660/actahortic.2019.1263.2.
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Lyons, Robert E. "065 USING THE SERVICE COURSE CONCEPT IN HORTICULTURE." HortScience 29, no. 5 (May 1994): 437c—437. http://dx.doi.org/10.21273/hortsci.29.5.437c.
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An undergraduate “Service Course” generally presents principles of a particular discipline in an uncomplicated manner needing no prerequisites. The target audience is typically students majoring outside the service course department or undeclared majors. The primary motives behind service courses are recruitment from within the university, providing non-mjors with a broad appreciation for a discipline, and providing graduate students with classroom teaching/management experience. `The structure, dynamics, success, and adaptability of “Indoor Plants,” a Virginia Tech Horticulture service course enrolling approximately 400 students per year, will be discussed. Comparisons with other service courses will be made.
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Caplan, D., M. Dixon, and Y. Zheng. "Coir-based growing substrates for indoor cannabis production." Acta Horticulturae, no. 1266 (November 2019): 55–62. http://dx.doi.org/10.17660/actahortic.2019.1266.9.
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Yang, Dong Sik, Ki-Cheol Son, and Stanley J. Kays. "Volatile Organic Compounds Emanating from Indoor Ornamental Plants." HortScience 44, no. 2 (April 2009): 396–400. http://dx.doi.org/10.21273/hortsci.44.2.396.
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A broad cross-section of volatiles emanating from four species of popular indoor ornamental plants (Spathiphyllum wallisii Regel, Sansevieria trifasciata Prain, Ficus benjamina L., and Chrysalidocarpus lutescens Wendl.) was identified and categorized based on source. Volatile organic compounds from individual plants were obtained using a dynamic headspace system and trapped on Tenax TA during the day and again at night. Using short-path thermal desorption and cryofocusing, the volatiles were transferred onto a capillary column and analyzed using gas chromatography–mass spectroscopy. The volatiles originated from the plants, media/micro-organisms, pot, and pesticides. A total of 23, 12, 13, and 16 compounds were identified from S. wallisii, S. trifasciata, F. benjamina, and C. lutescens, respectively. The night emanation rate was substantially reduced (i.e., by 30.1%, 69.5%, 73.7%, and 63.1%, respectively) reflecting in part the regulation of biosynthesis and the greater diffusion resistance when the stomata were closed. S. wallisii had the highest emanation rate, releasing 15 terpenoid compounds [e.g., linaloloxide, linalool, (Z)-β-farnesene, farnesal, (+)-δ-cadinene, (+)-β-costol] into the surrounding air. Alpha-farnesene (90.3%) was quantitatively the dominant volatile present followed by (Z)-β-farnesene (1.4%), (+)-β-costol (1.4%), and farnesal (1.1%). Substantially fewer terpenoids (i.e., two, nine, and eight) emanated from S. trifasciata, F. benjamina, and C. lutescens, which quantitatively emitted fewer volatiles than S. wallisii. Most terpenoids from the four species were sesquiterpenes rather than monoterpenes. Methyl salicylate, a plant-signaling compound, was emitted by all four species. Certain volatiles (e.g., 2-chlorobenzonitrile, 1-ethyl-3,5-dimethylbenzene) were released from growth media and/or micro-organisms therein; other sources included the plastic pot (e.g., 2-ethyl-1-hexanol, octamethyl cyclotetrasiloxane) and pesticide ingredients [e.g., 2-(2-methoxy- ethoxy)ethanol, 2-ethylhexyl salicylate, homosalate].
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Barnicle, Tom, and Karen Stoelzle Midden. "The Effects of a Horticulture Activity Program on the Psychological Well-being of Older People in a Long-term Care Facility." HortTechnology 13, no. 1 (January 2003): 81–85. http://dx.doi.org/10.21273/horttech.13.1.0081.
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This study investigated the effects of indoor horticulture activities on the current psychological well-being of older people in two long-term care facilities over a 7-week period. Thirty-one participants at one facility served as the control group. Thirty-one participants at another facility served as the horticulture group. Participants in both facilities continued with their normal daily routine and activities over the 7-week period; however, the horticulture group participated in a 1-hour horticulture activity session once a week over the 7-week period and the control group did not. The control group and horticulture group did not differ significantly in psychological well-being prior to the start of the study. After the 7-week program, the horticulture group had a significant increase in psychological well-being, whereas the control group had a slight decrease in psychological well-being. The results of this study indicate that horticulture activities may have a beneficial effect on the current psychological well-being of older people in a long-term care facility.
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Papinchak, Heather L., E. Jay Holcomb, Teodora Orendovici Best, and Dennis R. Decoteau. "Effectiveness of Houseplants in Reducing the Indoor Air Pollutant Ozone." HortTechnology 19, no. 2 (January 2009): 286–90. http://dx.doi.org/10.21273/hortsci.19.2.286.
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Three common indoor houseplants, snake plant (Sansevieria trifasciata), spider plant (Chlorophytum comosum), and golden pothos (Epipremnum aureum), were evaluated for their species effectiveness in reducing ozone concentrations in a simulated indoor environment. Continuously stirred tank reactor (CSTR) chambers housed within a greenhouse equipped with a charcoal filtration air supply system were used to simulate an indoor environment in which ozone concentrations could be measured and regulated. Ozone was injected into the chambers and when concentrations reached 200 ± 5 ppb, the ozone-generating system was turned off and ozone concentrations over time (ozone was monitored every 5–6 min in each chamber) were recorded until about <5 ppb were measured in the treatment chamber. On average, ozone depletion time (time from when the ozone generating system was turned off at ≈200 ppb to <5 ppb in the chamber) ranged from 38 to 120 min per evaluation. Ozone depletion rates were higher within chambers that contained plants than within control chambers without plants, but there were no plant species differences.
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Kelley, Kathleen M., Bridget K. Behe, and Elizabeth H. Moore. "Consumer Purchases of Campanula carpatica Jacq. 'Blue Clips' in Selected Supermarket Floral Departments as an Indoor Flowering Potted Plant." HortScience 38, no. 1 (February 2003): 121–23. http://dx.doi.org/10.21273/hortsci.38.1.121.
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Four-inch (10.2-cm) potted floweringCampanula carpatica Jacq. 'Blue Clips' (campanula) traditional herbaceous perennials, were sold in floral departments of three retail supermarket chain stores from 5 May through 20 May and 16 June through 1 July 2000. The intent was to determine whether repositioning campanula as a “new” indoor flowering potted plant would add to total floral department sales or detract from sales of more traditional flowering potted plants. Unit sales for all 4- and 4.5-inch (10.2- and 11.3-cm) flowering potted plants stocked in three supermarket floral departments were recorded weekly and compared with unit sales from three stores where campanula were not sold (control). Unit sales for campanula were similar to those of traditional indoor flowering potted plants frequently stocked in floral departments. Statistical analysis showed that mean unit sales of traditional potted flowering plants for stores that did and did not stock campanula were similar. Therefore, adding campanula to the flowering potted plant mix did not detract from or jeopardize sales of similar indoor flowering potted plants.
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Hitter Buru, Timea, Erzsébet Buta, Gertrud Bucur, and Maria Cantor. "Children–plant interaction using therapeutic horticulture intervention in a Romanian school." Acta Universitatis Sapientiae, Agriculture and Environment 11, no. 1 (December 1, 2019): 130–38. http://dx.doi.org/10.2478/ausae-2019-0012.
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Abstract Nature, childhood, and ecopsychology can to be connected in the landscape of a schoolyard. The landscape architecture of the natural environments serves as a wide-open green space for outdoor activities, creating imaginative and inventive urban environmental layouts and connecting natural elements. School-based green experience, either indoor or outdoor, can be a physical and mental activity for children. In the case of individuals, it makes` easy to access a natural, green environment and to be actively involved in a natural setting, developing either social and/or cognitive functions and improving concentration and creativity. Therapeutic horticulture activity, such as planting indoor plants, can be a good experience for developing team work, the proprioceptive (kinase) receptors, affectivity, socialization, permanent care, and responsibility. The potential benefits of ornamental plants for children involved in public education include spending time in outdoor spaces, fresh air and sunshine, experiencing a sense of control, and being exposed to sensory stimulations. Physical and psychological education based on therapeutic horticulture activities in Romanian schools, such as planting and green care, can provide important opportunities for children to develop their attachment to nature, offering sustainable education solutions to an active part of the natural environment.
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Pararajasingham, S., and L. A. Hunt. "Wheat Spike Temperature in Relation to Base Temperature for Grain Filling Duration." Canadian Journal of Plant Science 71, no. 1 (January 1, 1991): 63–69. http://dx.doi.org/10.4141/cjps91-007.
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Estimates of the base temperature for grain filling duration of wheat (Triticum aestivum L.) differ between outdoor and indoor studies. This study was set up to determine whether this difference could be attributed to variation in spike-air temperature differentials. Spike and/or spikelet temperatures were determined in wheat grown outdoors as well as indoors. Spike temperature, measured with an infrared thermometer, of wheat grown outdoors with adequate water supply was 1.5 °C greater than air temperature while spikelet temperature measured with a thermocouple closely approximated air temperature. In indoor grown wheat, on the other hand, regardless of the magnitude of air temperature, spikelet temperature was found to be 3–4 °C above that of air when lights were on. Estimating the base temperature for grain filling duration with data from a previous indoor study, with compensation for the 3–4 °C increase in spikelet temperature, resulted in 8.8 °C base temperature for grain filling duration, comparable to that obtained in outdoor studies. Differences between outdoor and indoor studies may thus reflect spike-air temperature differentials. Estimation of the base temperature for grain filling with air temperature appears appropriate for outdoor studies. Key words: Triticum aestivum (L.), base temperature, grain filling duration, wheat
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Kong, Yuyao, Ajay Nemali, Cary Mitchell, and Krishna Nemali. "Spectral Quality of Light Can Affect Energy Consumption and Energy-use Efficiency of Electrical Lighting in Indoor Lettuce Farming." HortScience 54, no. 5 (May 2019): 865–72. http://dx.doi.org/10.21273/hortsci13834-18.
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High energy-use cost for electric lighting is one of the major issues challenging sustainability of the indoor lettuce-farming industry. Thus, maximizing electrical energy-use efficiency (EUE, g·KWh−1), defined as the ratio of dry matter production (g) to electrical energy consumption (EEC, KWh−1), is crucial during indoor production. Light-emitting diodes (LEDs) are energy efficient and highly suitable for indoor farms. Research on optimal spectral quality of LEDs for lettuce growth is extensive; however, there is limited research examining LED spectral quality effects on EEC and EUE. Photon efficiency, defined as the ratio of light output to electrical energy input (PE, µmol·J−1), generally is used for selection of LED fixtures. Because PE does not account for differences in emitted light spectrum, it is not clear whether light-fixture selection based on PE can maximize EUE in lettuce production. This study comprised two experiments. In Expt. 1, we used four “phosphor-converted” commercial LEDs with different light intensities and spectra to model the effect of light spectral quality on lettuce shoot dry weight (SDW), EEC, and EUE. We also evaluated relations between EUE vs. PE and EUE vs. PER (PE based on red light) for indoor lettuce production. Results indicated that light spectral quality affected SDW, EEC, and EUE in lettuce production. Fitted models indicated that EEC increased linearly with increasing percentage of red-light output and was unaffected by other spectral colors or ratios. However, EUE increased in a curvilinear fashion with an increasing ratio of red to blue (R:B) light and reached a maximum at a ratio of 4.47. Similar to EUE, SDW also responded in a curvilinear fashion to R:B. Results also indicated that EUE correlated poorly with PE but linearly to PER. In Expt. 2, we grew three lettuce varieties under two commercial LED fixtures. They had similar levels of PE but different percentages of red, R:B, and PER values. Regardless of the variety, fixtures with greater percentages of red, R:B, and PER significantly increased EUE. We conclude that red-light quality is an important determinant of EUE and growers should select fixtures based on R:B and high PER in indoor lettuce farming.
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Dhanraj, Dhanasekaran. "Role of ornamental horticulture in outdoor and indoor pollution abatement — A review." Journal of Ornamental Horticulture 22, no. 1and2 (2019): 1. http://dx.doi.org/10.5958/2249-880x.2019.00001.x.
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Niu, G., and J. Masabni. "Roles of indoor vertical farming in sustainable production of horticultural crops." Acta Horticulturae, no. 1305 (February 2021): 365–74. http://dx.doi.org/10.17660/actahortic.2021.1305.48.
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Kim, Kwang Jin, Myeong Il Jeong, Dong Woo Lee, Jeong Seob Song, Hyoung Deug Kim, Eun Ha Yoo, Sun Jin Jeong, et al. "Variation in Formaldehyde Removal Efficiency among Indoor Plant Species." HortScience 45, no. 10 (October 2010): 1489–95. http://dx.doi.org/10.21273/hortsci.45.10.1489.
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The efficiency of volatile formaldehyde removal was assessed in 86 species of plants representing five general classes (ferns, woody foliage plants, herbaceous foliage plants, Korean native plants, and herbs). Phytoremediation potential was assessed by exposing the plants to gaseous formaldehyde (2.0 μL·L−1) in airtight chambers (1.0 m3) constructed of inert materials and measuring the rate of removal. Osmunda japonica, Selaginella tamariscina, Davallia mariesii, Polypodium formosanum, Psidium guajava, Lavandula spp., Pteris dispar, Pteris multifida, and Pelargonium spp. were the most effective species tested, removing more than 1.87 μg·m−3·cm−2 over 5 h. Ferns had the highest formaldehyde removal efficiency of the classes of plants tested with O. japonica the most effective of the 86 species (i.e., 6.64 μg·m−3·cm−2 leaf area over 5 h). The most effective species in individual classes were: ferns—Osmunda japonica, Selaginella tamariscina, and Davallia mariesii; woody foliage plants—Psidium guajava, Rhapis excels, and Zamia pumila; herbaceous foliage plants—Chlorophytum bichetii, Dieffenbachia ‘Marianne’, Tillandsia cyanea, and Anthurium andraeanum; Korean native plants—Nandina domestica; and herbs—Lavandula spp., Pelargonium spp., and Rosmarinus officinalis. The species were separated into three general groups based on their formaldehyde removal efficiency: excellent (greater than 1.2 μg·m−3 formaldehyde per cm2 of leaf area over 5 h), intermediate (1.2 or less to 0.6), and poor (less than 0.6). Species classified as excellent are considered viable phytoremediation candidates for homes and offices where volatile formaldehyde is a concern.
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Yang, Dong Sik, Svoboda V. Pennisi, Ki-Cheol Son, and Stanley J. Kays. "Screening Indoor Plants for Volatile Organic Pollutant Removal Efficiency." HortScience 44, no. 5 (August 2009): 1377–81. http://dx.doi.org/10.21273/hortsci.44.5.1377.
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Twenty-eight ornamental species commonly used for interior plantscapes were screened for their ability to remove five volatile indoor pollutants: aromatic hydrocarbons (benzene and toluene), aliphatic hydrocarbon (octane), halogenated hydrocarbon [trichloroethylene (TCE)], and terpene (α-pinene). Individual plants were placed in 10.5-L gas-tight glass jars and exposed to ≈10 ppm (31.9, 53.7, 37.7, 46.7, and 55.7 mg·m−3) of benzene, TCE, toluene, octane, and α-pinene, respectively. Air samples (1.0 mL) within the glass containers were analyzed by gas chromatography–mass spectroscopy 3 and 6 h after exposure to the test pollutants to determine removal efficiency by monitoring the decline in concentration over 6 h within sealed glass containers. To determine removal by the plant, removal by other means (glass, plant pot, media) was subtracted. The removal efficiency, expressed on a leaf area basis for each volatile organic compound (VOC), varied with plant species. Of the 28 species tested, Hemigraphis alternata, Hedera helix, Hoya carnosa, and Asparagus densiflorus had the highest removal efficiencies for all pollutants; Tradescantia pallida displayed superior removal efficiency for four of the five VOCs (i.e., benzene, toluene, TCE, and α-pinene). The five species ranged in their removal efficiency from 26.08 to 44.04 μg·m−3·m−2·h−1 of the total VOCs. Fittonia argyroneura effectively removed benzene, toluene, and TCE. Ficus benjamina effectively removed octane and α-pinene, whereas Polyscias fruticosa effectively removed octane. The variation in removal efficiency among species indicates that for maximum improvement of indoor air quality, multiple species are needed. The number and type of plants should be tailored to the type of VOCs present and their rates of emanation at each specific indoor location.
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Kim, Ho-Hyun, In-Young Yeo, and Jae-Young Lee. "Higher Attention Capacity After Improving Indoor Air Quality by Indoor Plant Placement in Elementary School Classrooms." Horticulture Journal 89, no. 3 (2020): 319–27. http://dx.doi.org/10.2503/hortj.utd-110.
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Hudelson, Timothy J., F. Mitchell Westmoreland, and Bruce Bugbee. "Elevated Atmospheric Ethylene and High Temperature Independently Inhibit Fruit Set But Not Vegetative Growth in Tomato." HortScience 58, no. 3 (March 2023): 247–53. http://dx.doi.org/10.21273/hortsci16901-22.
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Ethylene is an essential plant hormone at low concentrations. Concentrations in the field rarely exceed 5 nmol⋅mol−1 (0.005 ppm), but it can accumulate as a gas in closed, indoor environments. These elevated levels can reduce growth and yield. Temperature alters ethylene synthesis and has the potential to influence ethylene sensitivity of crop plants in sealed greenhouses and indoor environments. We studied ethylene sensitivity of tomatoes (Solanum lycopersicum L. cv. MicroTina) using a unique, 12-chamber system. Ethylene levels of 0, 20, and 40 nmol⋅mol−1 (parts per billion) were maintained throughout the life cycle, at an air temperature of 22 or 28 °C. Yield of red fruit was three times higher at 22 than at 28 °C. There was a steady decrease in yield with increasing ethylene concentration, but vegetative growth was reduced less than 10% in any treatment. The highest ethylene concentration reduced yield to 11% of the control at 22 °C and to 4% of the control at 28 °C; the intermediate ethylene level reduced yield to 51% of the control at 22 °C and 37% at 28 °C. Regardless of temperature, filtering of ethylene in indoor environments to below 20 nmol⋅mol−1 is necessary to achieve normal fruit set and yield in tomato.
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Cruz, Stephanie, Edzard van Santen, and Celina Gómez. "Evaluation of Compact Tomato Cultivars for Container Gardening Indoors and under Sunlight." Horticulturae 8, no. 4 (March 30, 2022): 294. http://dx.doi.org/10.3390/horticulturae8040294.
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Numerous compact tomato cultivars are available for home gardening. However, evaluations under different environmental conditions are limited. The aim of this study was to characterize the growth and productivity of 20 compact tomato cultivars grown indoors under environmental conditions that resembled a residential space (11 mol·m−2·d−1 of white light, constant 22 °C, and moderate relative humidity) or in a greenhouse with sunlight only. Plants in the greenhouse were generally larger and yielded more fruit than those grown indoors, likely due to the various differences in environmental conditions and corresponding effects of water and nutrient availability. Considering growth and yield variables, all cultivars evaluated in this study are recommended for outdoor gardening. However, ‘Little Bing’, ‘Sweet SturdyTM F1—Grace’, ‘Sweet SturdyTM F1—Jimmy’, ‘Sweet SturdyTM F1—Jo’, and ‘Tarzan F1′ are likely too large to be grown in most space-limited indoor environments. Furthermore, ‘Little Bing’, ‘Rosy Finch’, ‘Sweet ‘n’ Neat Yellow’, and ‘Yellow Canary’ were affected by intumescence when grown indoors, which could negatively affect gardening experiences until recommendations to mitigate this disorder become available. Results from this study provide baseline information for the use of compact tomato cultivars for container gardening indoors and under sunlight.
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Dorais, M., A. Brégard, C. Ménard, B. Dansereau, N. Zyromski, and S. Pepin. "Indoor living green walls of aromatic plants lit with LEDs." Acta Horticulturae, no. 1287 (August 2020): 117–26. http://dx.doi.org/10.17660/actahortic.2020.1287.16.
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Pennisi, G., F. Orsini, M. Landolfo, A. Pistillo, A. Crepaldi, S. Nicola, J. A. Fernández, L. F. M. Marcelis, and G. Gianquinto. "Optimal photoperiod for indoor cultivation of leafy vegetables and herbs." European Journal of Horticultural Science 85, no. 5 (October 22, 2020): 329–38. http://dx.doi.org/10.17660/ejhs.2020/85.5.4.
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Kaltsidi, Maria P., Rafael Fernández-Cañero, and Luis Pérez-Urrestarazu. "Assessment of different LED lighting systems for indoor living walls." Scientia Horticulturae 272 (October 2020): 109522. http://dx.doi.org/10.1016/j.scienta.2020.109522.
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Ishchuk, L. P. "From the experience of teaching “Decorative plants of indoor soil”." Journal of Native and Alien Plant Studies, no. 1 (December 28, 2021): 103–9. http://dx.doi.org/10.37555/2707-3114.1.2021.247557.
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The work program and ten-year experience of teaching the educational component “Ornamental plants of the closed ground” in Bila Tserkva National Agrarian University for the specialty 206 “Horticulture” of the bachelors level are analyzed. Considerable attention is paid to the practical training of applicants for higher education, in particular, in terms of production — botanical gardens, arboretums, garden centers and greenhouse complexes. The scale of evaluation of the success of higher applicants and the distribution of points by types of work are presented.
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Hawkins, Jemma L., Kathryn J. Thirlaway, Karianne Backx, and Deborah A. Clayton. "Allotment Gardening and Other Leisure Activities for Stress Reduction and Healthy Aging." HortTechnology 21, no. 5 (October 2011): 577–85. http://dx.doi.org/10.21273/horttech.21.5.577.
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This study explored the potential benefits of allotment gardening for healthy aging, focusing on the opportunities for outdoor physical activity, social support, and contact with nature that allotment gardening provides. Participants included 94 individuals aged between 50 and 88 years who were members of various indoor and outdoor activity groups. The participants completed physiological measures and psychometric scales of self-rated health, perceived stress, physical activity level, and perceived social support. A significant difference in perceived stress levels was observed between the activity groups. Allotment gardeners reported significantly less perceived stress than participants of indoor exercise classes (P < 0.05). As there were no significant differences in reported levels of social support and physical activity, explanations for the allotment gardeners' lower stress levels focus on the potential contribution of engagement with nature and psychological restoration. These findings represent a step toward understanding the benefits of allotment gardening activity as a health-promoting behavior in later life.
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Dou, Haijie, Genhua Niu, Mengmeng Gu, and Joseph G. Masabni. "Responses of Sweet Basil to Different Daily Light Integrals in Photosynthesis, Morphology, Yield, and Nutritional Quality." HortScience 53, no. 4 (April 2018): 496–503. http://dx.doi.org/10.21273/hortsci12785-17.
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Consumption of basil (Ocimum basilicum) has been increasing worldwide in recent years because of its unique aromatic flavor and relatively high concentration of phenolics. To achieve a stable and reliable supply of basil, more growers are turning to indoor controlled-environment production with artificial lighting due to its high environmental controllability and sustainability. However, electricity cost for lighting is a major limiting factor to the commercial application of indoor vertical farming, and little information is available on the minimum light requirement to produce uniform and high-quality sweet basil. To determine the optimal daily light integral (DLI) for sweet basil production in indoor vertical farming, this study investigated the effects of five DLIs, namely, 9.3, 11.5, 12.9, 16.5, and 17.8 mol·m−2·d−1 on basil growth and quality. ‘Improved Genovese Compact’ sweet basil was treated with five DLIs provided by white fluorescent lamps (FLs) for 21 d after germination, and gas exchange rate, growth, yield, and nutritional quality of basil plants were measured to evaluate the effects of the different DLIs on basil growth and quality. Results indicated that basil plants grown under higher DLIs of 12.9, 16.5, or 17.8 mol·m−2·d−1 had higher net photosynthesis, transpiration, and stomatal conductance (gS), compared with those under lower DLIs of 9.3 and 11.5 mol·m−2·d−1. High DLIs resulted in lower chlorophyll (Chl) a+b concentration per leaf fresh weight (FW), higher Chl a/b ratios, and larger and thicker leaves of basil plants. The shoot FW under DLIs of 12.9, 16.5, and 17.8 mol·m−2·d−1 was 54.2%, 78.6%, and 77.9%, respectively, higher than that at a DLI of 9.3 mol·m−2·d−1. In addition, higher DLIs led to higher soluble sugar percent and dry matter percent than lower DLIs. The amounts of total anthocyanin, phenolics, and flavonoids per plant of sweet basil were also positively correlated to DLIs, and antioxidant capacity at a DLI of 17.8 mol·m−2·d−1 was 73% higher than that at a DLI of 9.3 mol·m−2·d−1. Combining the results of growth, yield, and nutritional quality of sweet basil, we suggest a DLI of 12.9 mol·m−2·d−1 for sweet basil commercial production in indoor vertical farming to minimize the energy cost while maintaining a high yield and nutritional quality.
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WINZELER, M., D. E. McCULLOUGH, and L. A. HUNT. "GENOTYPIC DIFFERENCES IN DARK RESPIRATION OF MATURE LEAVES IN WINTER WHEAT (Triticum aestivum L.)." Canadian Journal of Plant Science 68, no. 3 (July 1, 1988): 669–75. http://dx.doi.org/10.4141/cjps88-080.
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Oxygen uptake of mature leaves was measured on a range of winter wheat (Triticum aestivum L.) genotypes both indoors (four genotypes) and in the field (six genotypes). The relationship among mature leaf respiration, leaf size, specific leaf weight and leaf nutrient status was investigated. Correlations between leaf respiration and total plant dry weight as well as tiller number were calculated in the indoor study. Significant differences of 6–25% in mature leaf respiration rates were evident among winter wheat genotypes in the indoor as well as in the field study. Leaf position as well as environment had a marked influence on the order and magnitude of genotype effects on mature leaf respiration rates. Leaf respiration was not related to specific leaf weight, leaf nitrogen, or phosphorus content, but was negatively related to leaf size. Leaf respiration was not related to total dry weight and tiller number of single plants grown indoors.Key words: Respiration, genotypic differences, wheat (winter), Triticum aestivum L.
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Kim, Kwang Jin, Eun Ha Yoo, Myeong Il Jeong, Jeong Seob Song, Seung Youn Lee, and Stanley J. Kays. "Changes in the Phytoremediation Potential of Indoor Plants with Exposure to Toluene." HortScience 46, no. 12 (December 2011): 1646–49. http://dx.doi.org/10.21273/hortsci.46.12.1646.
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Changes in phytoremediation efficiency after repeated exposures (three) to toluene (1.3 ppm) were assessed in 26 species and two additional cultivars of indoor plants. There was a rapid increase in toluene removal efficiency in 27 of the 28 crops with the greatest increase between the first and second exposure (i.e., after 3 days). The increase in efficiency between the first and third exposure ranged from 378 μg·m−3·h−1·m−2 leaf area in Pinus densiflora to –16.6 in Salvia elegans with a mean of 156 for all crops. Percent change ranged from 614 (Pittosporum tobira) to –8 (Salvia elegans) but was not necessarily indicative of phytoremediation value of a species. Rapid changes in phytoremediation efficiency in response to exposure to toluene appear to be widespread in plants and may be the result of an effect on gene expression in the plant and/or certain soil microbes or changes in the population density of toluene-metabolizing microbes. Increasing toluene removal efficiency is advantageous and as a consequence, a better understanding of the mechanism(s) operative may improve use of the response for practical applications.
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Kang, Soohyun, Yating Zhang, Yuqi Zhang, Jie Zou, Qichang Yang, and Tao Li. "Ultraviolet-A Radiation Stimulates Growth of Indoor Cultivated Tomato (Solanum lycopersicum) Seedlings." HortScience 53, no. 10 (October 2018): 1429–33. http://dx.doi.org/10.21273/hortsci13347-18.
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Ultraviolet-A (UV-A) is the main component of UV radiation in nature. However, its role on plant growth, to a large extent, remains unknown. In this study, tomato (Solanum lycopersicum ‘Beijing Cherry Tomato’) seedlings were cultivated in an controlled environment in which UV-A radiation was provided by UV-A fluorescent lamps (λmax = 369 nm) with a fluence rate of 2.28 W·m−2. The photoperiod of UV-A radiation was 0, 4, 8, and 16 hours, which corresponds to control, UV-A4, UV-A8, and UV-A16 treatments, respectively. The photosynthetic photon flux density (PPFD) was 220 μmol·m−2·s−1, which was provided by light-emitting diodes (LEDs) with a blue/red light ratio of 1:9, the photoperiod of PPFD was 16 hours. We showed that supplementing 8 and 16 hours of UV-A to visible radiation (400–700 nm) stimulated plant biomass production by 29% and 33%, respectively, compared with that of control. This resulted mainly from larger leaves (i.e., 22% and 31% in 8 and 16 hours UV-A, respectively), which facilitated light capture. Supplemental UV-A also enhanced photosynthetic capacity, as indicated by greater net photosynthesis rates in response to CO2 under saturating PPFD. Furthermore, the greatest stomatal conductance (gS) value was observed in UV-A16, followed by UV-A8, which correlated with the greater stomatal density in the corresponding treatments. Moreover, supplemental UV-A did not induce any stress, as the maximum quantum efficiency of photosynthetic system II (PSII) (Fv/Fm) remained ≈0.82 in all treatments. Similarly, chlorophyll content and leaf mass area (LMA) were also unaffected by UV-A radiation. Taken together, we conclude that supplementing reasonable levels of UV-A to visible radiation stimulates growth of indoor cultivated tomato seedlings.
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López-López, N., M. I. Iglesias-Díaz, S. Lamosa-Quinteiro, A. López-Fabal, and M. Cortizas-Suárez. "Evaluation of different plant species arranged in panels for indoor vertical gardens." Acta Horticulturae, no. 1345 (September 2022): 205–8. http://dx.doi.org/10.17660/actahortic.2022.1345.27.
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