Academic literature on the topic 'Fruit quality'
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Journal articles on the topic "Fruit quality"
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Kumsa, Negasa Andersa. "Review on the Effect of Fruit Wine Quality and Fermentation Conditions on the Quality of Wine." Food Science & Nutrition Technology 5, no. 5 (September 30, 2020): 1–9. http://dx.doi.org/10.23880/fsnt-16000226.
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Fruit wine is an important part of our diet that contains essential part of vitamin and minerals that contribute to overall strength for our health. Like other beverages fruit wines are undistilled alcoholic beverages usually made from grapes or other fruits such as peaches, plums or apricots, banana, elderberry, or black berry which are nutritive, more tasty, and mild stimulants. These fruits undergo a period of fermentation and aging. They usually have an alcohol content ranging between 5 and 13%. Wines made from fruits are often named after the fruits. No other drinks, except water and milk, have earned such universal acceptance and esteem throughout the ages as has wine. Wine is a food with a flavor like fresh fruit which could be stored and transported under the existing conditions. Being fruit-based fermented and undistilled product, wine contains most of the nutrients present in the original fruit juice. The nutritive value of wine is increased due to the release of amino acids and other nutrients from yeast during fermentation. The quality of fruit wine is easily affected during fermentation due to inappropriate selection of strain for fermentation and poor management of others fermentation conditions. In this present review, I discussed, history of fermentation, initial quality of grape fruit and wine quality, fermentation stage of wine, factors influencing fermentation and wine quality
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Pardo, Hagar, Abiola Owoyemi, Livnat Goldenberg, Yossi Yaniv, Ofir Benjamin, Adi Doron-Faigenboim, Ron Porat, and Nir Carmi. "Quality and Flavor of ‘Aliza’ Fruit: A Unique Pomelo × Mandarin Hybrid." Horticulturae 9, no. 4 (March 24, 2023): 420. http://dx.doi.org/10.3390/horticulturae9040420.
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‘Aliza’ is a new pomelo × mandarin hybrid (Citrus maxima, cv. Red Chandler × Citrus reticulata, cv. Ora) developed by the Israeli citrus breeding program at the Volcani Institute. Here, we aimed to characterize the quality and flavor of ‘Aliza’ fruit as compared to other commercial citrus fruit, specifically pomelo (C. maxima), grapefruit (Citrus paradisi), orange (Citrus sinensis) and mandarin (C. reticulata). ‘Aliza’ fruits have a similar size as grapefruits, but have a thinner peel and a unique yellowish/golden color. ‘Aliza’ fruits are completely seedless and have especially high juice contents. They also have a unique, highly preferred flavor, characterized by high sweetness and moderate bitterness and acidity, with strong citrusy and tropical fruity aromas. Sensory analyses conducted with the aid of a trained panel and an electronic tongue revealed that the flavor of ‘Aliza’ fruits is different from the flavors of other citrus species. Consumer acceptance and preference tests revealed that ‘Aliza’ fruit are highly appreciated and favored. The aroma volatile profile of ‘Aliza’ fruit was somewhat similar to those of pomelo and grapefruit, but very different from those of orange and mandarin. Overall, ‘Aliza’ fruits can be distinguished from other citrus fruits by their unique color, high juice content and exceptional, unique flavor.
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Robinson*, Terence L., and Christopher B. Watkins. "Cropload Affects Fruit Quality of Honeycrisp Apple." HortScience 39, no. 4 (July 2004): 841D—842. http://dx.doi.org/10.21273/hortsci.39.4.841d.
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In 2001 and 2002, we imposed a wide range of croploads (0-15 fruits/cm2 of TCA) on 4- and 5-year-old Honeycrisp/M.9 trees by manual hand thinning soon after bloom to define appropriate croploads that give adequate repeat bloom and also the best fruit quality. At harvest each year we evaluated fruit ripening and quality. Samples were stored for 5 months in air at 38 °F and 33 °F and evaluated for fruit firmness and storage disorders. Cropload was negatively correlated with tree growth, return bloom, fruit size, fruit red color, fruit sugar content, fruit starch content, fruit firmness, fruit acidity, fruit bitter pit, fruit senescent breakdown, fruit rot and fruit superficial scald, but was positively correlated with leaf blotch symptoms, fruit internal ethylene concentration at harvest, and fruit soggy breakdown. There was a strong effect of cropload on fruit size up to a cropload 7, beyond which there was only a small additional effect. Although there was considerable variation in return bloom, a relatively low cropload was required to obtain adequate return bloom. Fruit red color was reduced only slightly up to a cropload of 8 beyond which it was reduced dramatically. The reduced fruit color and sugar content at high croploads could indicate a delay in maturity of but, fruits from high croploads were also softer, had less starch and greater internal ethylene. It that excessive croploads advance maturity. Overall, croploads greater than 10 resulted in no bloom the next year, and poor fruit size, color and flavor, but these fruits tended to have the least storage disorders. Moderate croploads (7-8) resulted in disappointing return bloom and mediocre fruit quality. For optimum quality and annual cropping, relatively low croploads of 4-5 were necessary.
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Alam, Arif U., Pranali Rathi, Heba Beshai, Gursimran K. Sarabha, and M. Jamal Deen. "Fruit Quality Monitoring with Smart Packaging." Sensors 21, no. 4 (February 22, 2021): 1509. http://dx.doi.org/10.3390/s21041509.
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Smart packaging of fresh produce is an emerging technology toward reduction of waste and preservation of consumer health and safety. Smart packaging systems also help to prolong the shelf life of perishable foods during transport and mass storage, which are difficult to regulate otherwise. The use of these ever-progressing technologies in the packaging of fruits has the potential to result in many positive consequences, including improved fruit quality, reduced waste, and associated improved public health. In this review, we examine the role of smart packaging in fruit packaging, current-state-of-the-art, challenges, and prospects. First, we discuss the motivation behind fruit quality monitoring and maintenance, followed by the background on the development process of fruits, factors used in determining fruit quality, and the classification of smart packaging technologies. Then, we discuss conventional freshness sensors for packaged fruits including direct and indirect freshness indicators. After that, we provide examples of possible smart packaging systems and sensors that can be used in monitoring fruits quality, followed by several strategies to mitigate premature fruit decay, and active packaging technologies. Finally, we discuss the prospects of smart packaging application for fruit quality monitoring along with the associated challenges and prospects.
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Turhan, A., N. Ozmen, M. S. Serbeci, and V. Seniz. "Effects of grafting on different rootstocks on tomato fruit yield and quality." Horticultural Science 38, No. 4 (November 15, 2011): 142–49. http://dx.doi.org/10.17221/51/2011-hortsci.
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The aim of the study was to find effects of tomato grafting on another cultivar. The tomato cultivars used as scions were Yeni Talya, Swanson and Beril. Cultivars used as rootstocks were Beaufort and Arnold. Cleft grafting methods were applied. The following characteristics of grafted and nongrafted plants were recorded: fruit index, number of fruits/truss, fruit weight, fruit yield, dry matter, pH, concentration of soluble solids, titratable acidity, total sugar and lycopene and vitamin C. The results showed that fruit yield and fruit index, number of fruits/truss and fruit weights were improved by grafting. Fruit quality, measured in terms of dry matter, concentration of soluble solids, total sugar, and vitamin C content, was lower in the fruits of grafted plants than in nongrafted ones. No significant difference in lycopene and pH content was found. Titratable acid content was improved by grafting. A positive effect of grafting was recorded when Beaufort was used as rootstock. These results showed that grafting could be an advantageous alternative in tomato production.
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Srinivas, R. "Deep Learning based Fruit Quality Inspection." International Journal for Research in Applied Science and Engineering Technology 10, no. 6 (June 30, 2022): 4535–39. http://dx.doi.org/10.22214/ijraset.2022.44928.
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Abstract: Digital images and computer sciences have become two powerful tools in several areas, such as astronomy, medicine, forensics, etc. In the last few years, computer sciences are getting involved in agricultural and food science to decide based on estimated or actual parameters named features. Rottenness is the state of decomposing or decaying the quality of the fruit, which not only affects the taste and appearance but also modifies its nutritional composition, causing the presence of mycotoxins dangerous for humans. Detecting rotten fruits has become significant in the agricultural industry. Usually, the classification of fresh and rotten fruits carried by humans is not effective for the fruit farmers. Human beings will become tired after doing the same task multiple times, but machines do not. Thus, the project proposes an approach to reduce human efforts, reduce the cost and time for production by identifying the defects in the fruits in the agricultural industry. If we do not detect those defects, those defected fruits may contaminate good fruits. Hence, we proposed a model to avoid the spread of rottenness. The proposed model classifies the fresh fruits and rotten fruits from the input fruit images. Here, we use a trained deep learning model i,e sequential model to detect whether a fruit is fresh or rotten. In this work, three types of fruits, such as apple, banana, and oranges are used as a dataset. The experiments were done using a dataset composed of around 12000 images divided by 6 classes, 3 fresh fruits, and 3 rotten fruits
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Mizrach, A., and G. Rosenhouse. "Quality fruit." Manufacturing Engineer 81, no. 4 (August 1, 2002): 156–58. http://dx.doi.org/10.1049/me:20020402.
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Čížková, H., R. Ševčík, A. Rajchl, and M. Voldřich. "Nutritional Quality of Commercial Fruit Baby Food." Czech Journal of Food Sciences 27, Special Issue 1 (June 24, 2009): S134—S137. http://dx.doi.org/10.17221/616-cjfs.
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Commercial fruit baby food is a preserved fruit product usually made with fruit purees, sugar, water and variable additives (thickening agents, antioxidants, etc.). As the foodstuffs intended for particular nutritional uses, baby foods for infants and young children conforms to a set of strict guidelines e.g. maximum levels for pesticide residues, microbiological contamination, addition of additives, labelling, etc. However, being an important supplement to children diet and/or for their progressive adaptation to ordinary food, the nutritional quality of commercial fruit baby food in very important. Ten samples of commercial fruit baby food from the market were analysed for the fruit content, ascorbic acid and total polyphenols content and total antioxidant capacity determined by DPPH method. Hydroxymethylfurfural (HMF) and furfural content were followed as the time-temperature effort indicators. The method for the estimation of fruit content in products was based on the concentration of glucose, fructose, sorbitol, potassium, formol number, malic and citric acid, phosphorus, ash and refractive index and the results were compared with the Code of practice of AIJN and literature sources. The study indicates that there are big differences in composition and quality of commercial fruit baby food, whereas some samples contain fruits only, another products are diluted with significant amount of sugar, water and starchy fillers.
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Zaremuk, Rimma Sh, and Tatiana A. Kopnina. "Promising varieties of sour cherry Prunus cerasus L. with a complex of fruit quality traits for growing in the southern Russia." RUDN Journal of Agronomy and Animal Industries 17, no. 4 (December 27, 2022): 437–47. http://dx.doi.org/10.22363/2312-797x-2022-17-4-437-447.
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Southern assortment of cherries does not quite meet the modern requirements of production. Many varieties are low-productive, not resistant to cherry leaf spot ( Coccomyces hiemalis ) and moniliosis ( Monilia cinerea ), small-fruited, with low taste qualities. However, new varieties have been created that have not been studied by the complex of consumer and commodity qualities of fruits. Thus, evaluation of new varieties for these traits is relevant. The aim of the research was to evaluate cherry varieties of different origin for commodity, biochemical, and consumer qualities of fruits. The research was carried out in the Kuban horticultural zone of the Krasnodar territory. Objects of the research were 9 varieties of sour cherry trees. Field and laboratory studies were conducted according to Program and methodology of varietal study of fruit, berry and nut crops (1999), Methodological instructions on chemical and technological variety testing of vegetable, fruit and berry crops for canning industry (1993). Statistical analysis was carried out according to B.A. Dospekhov (2014) and G.F. Lakin (1990). It was found that the average fruit weight of cherry varieties varied not significantly - from 2.72 to 6.45 g, which was confirmed by the coefficient of variation (23.3 %). Indicators of maximum and minimum fruit weight varied significantly in varieties, coefficients of variation were 27.2 and 29.7 %, respectively. The following cherry varieties with large fruits were identified: Timati, Igrushka, Duk Ivanovna, Duk Khodosa, Prizvaniya and Svetlaya. were distinguished. Cherry varieties with high sugar content in fruits were as follows: Feyа, Dzhusi Frut and Igrushka. Feyа, Duk Khodosa, Prizvanie, Svetlaya and Dzhusi Frut had fruits with low acidity; Feyа, Dzhusi Frut and Igrushka fruits were characterized by high content of soluble solids in fruits. Feyа, Igrushka and Duk Khodosa fruits had the highest content of vitamin C; Igrushka, Duk Khodosa, Prizvanie, Svetlaya and Dzhusi Frut were rich in Vitamin P; Duk Khodosa, Prizvanie, Dzhusi Frut and Duk Ivanovna had the largest anthocyanin content. Therefore, Igrushka and Duk Khodosa cherry varieties are recommended for growing in the southern Russia and breeding for improvement of fruit quality.
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Patil, Kavita. "Identifying the Quality of Tomatoes in Image Processing." International Journal for Research in Applied Science and Engineering Technology 10, no. 1 (January 31, 2022): 780–82. http://dx.doi.org/10.22214/ijraset.2022.39909.
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Abstract: In agricultural and horticulture. Image processing is one of the widely used application. in this paper automated quality identification using some image processing techniques is there that can be done using some image features which help in quality detection of vegetables like shape, color and size. tomatoes are in high demand because the world population consumes them daily. This research is to improve tomato production and fruit quality through fruit measurement methods, which have a low impact factor on fruit and plant during measurements. As there is high demand for quality fruits in the market fruit grading process is considered as very important. Fruit grading by a human may cause inefficient and it may also leads to some error. Researchers have developed numerous algorithms for quality grading and sorting of fruits. color is most important features for indentifying disease and maturity of the fruit. Here a sorting process is introduced where the image of the fruit is captured and analyzed using image processing techniques and the defected fruit is discarding by this process. the main aim of this paper is to do the quality check of the fruits within a short span of time. Keywords: Fruit grading, Tomato quality, image processing, segmentation, classification
Dissertations / Theses on the topic "Fruit quality"
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Marques, José Roberto. "'Hass' avocado fruit quality : the role of fruit minerals and rootstocks /." St. Lucia, Qld, 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16748.pdf.
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Stander, Ockert Petrus Jacobus. "Fruit split and fruit size studies on Citrus." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/79933.
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Thesis (MScAgric)--Stellenbosch University, 2013.ENGLISH ABSTRACT: Fruit size and the integrity of the rind are key components that determine the value of a citrus fruit. The application of 2,4-dichlorophenoxy acetic acid (2,4-D) to reduce splitting, a physiological disorder which entails cracking of the rind as well as to increase fruit size was conducted on three different split-susceptible mandarin and two split-susceptible orange cultivars. Treatments were applied directly after the physiological fruit drop period, as well as in January and February at 10 mg·L-1, alone or in combination with calcium (Ca), potassium (K) or gibberellic acid (GA3). Application of 2,4-D directly after physiological fruit drop, either alone or in a tank-mix with K, consistently reduced the number of split mandarin fruit, with later applications in January and February generally being ineffective. Post physiological fruit drop application of 10 mg·L-1 2,4-D significantly increased growth rate (mm.day-1) of all the mandarin cultivars, resulting in increased fruit size. Differences in sensitivity of cultivars to 2,4-D were evident, with the January application reducing the splitting in ‘Midknight’ Valencia. However, all the 2,4-D treatments reduced the fruit growth rate of the orange cultivars. The 2,4-D treatments, in terms of splitting, increased rind thickness, -strength and -coarseness of ‘Marisol’ Clementine, throughout fruit development. In addition fruit diameter and –length increased to such an extent that the fruit shape was altered (reduced d/l-ratio), reducing the potential of the rind to crack and the fruit to split, however rind coarseness of treated fruit was also increased. There were no major negative side effects on internal and external fruit quality, except for a possible reduction in juice content (%). Therefore, 10 mg·L-1 2,4-D can be applied directly after physiological fruit drop on ‘Marisol’ Clementine and ‘Mor’ mandarin to reduce fruit splitting.
AFRIKAANSE OPSOMMING: Vruggrootte asook die integriteit van die skil is belangrike aspekte in die bepaling van ʼn sitrusvrug se waarde. Die toediening van 2,4-dichlorofenoksie asynsuur (2,4-D) om vrugsplit, 'n fisiologiese defek wat tot die kraak van die sitrusskil lei, te verminder is getoets op drie mandaryn- en twee lemoenkultivars. Hiermee saam is die potensiaal van 2,4-D om vruggrootte te verbeter ook geëvalueer. Die 2,4-D behandelings is direk na die fisiologiese vrugval periode toegedien, asook in Januarie en Februarie, teen 10 mg·L-1, alleen of in kombinasie met kalsium (Ca), kalium (K) of gibberelliensuur (GS3). Al die mandarynkultivars het ʼn vermindering in die totale aantal gesplete vrugte getoon indien die 2,4-D (enkel of in kombinasie met K) toegedien was direk na fisiologiese vrugval. Suksesvolle behandelings het ook 'n toename in vruggrootte tot gevolg gehad. Toediening van behandelings in Januarie en Februarie was oor die algemeen oneffektief. Verskille in kultivar sensitiwiteit teenoor 2,4-D is gevind, met vrugsplit in ‘Midknight’ Valencia wat verminder was deur die Januarie toediening van 2,4-D. Al die 2,4-D behandelings het vruggrootte van die lemoenkultivars verlaag. Daar is bevind dat die 10 mg.L-1 2,4-D, enkel of in kombinasie met K, ‘n toename in beide skildikte en –sterkte van ‘Marisol’ Clementine teweeg bring asook ʼn growwer skil. Behandelings met 2,4-D het vrugdeursnee en –lengte laat toeneem, wat ʼn verandering in vrugvorm tot gevolg gehad het, tot so ʼn mate dat vrugte minder geneig was om gesplete te wees. Behalwe vir ʼn moontlike verlaging in die sapinhoud (%) van vrugte, was daar geen noemenswaardige negatiewe effekte op interne en eksterne vrugkwaliteit nie. Die toediening van 10 mg.L-1 2,4-D direk na fisiologiese vrugval kan dus aanbeveel word op mandaryn kultivars wat geneig is tot vrugsplit.
The Citrus Academy
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Amenta, Margherita. "Quality and traceability of typical mediterranean fruits." Doctoral thesis, Università di Catania, 2013. http://hdl.handle.net/10761/1400.
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Quality and traceability are the winning combination for the development of a modern agriculture, where other functions, related to territorial, environmental and social skills, are gradually taking place aside from the traditional economic task.
In the last decade quality has become an essential feature to ensure the access into the market and an effective competition to many ever-growing exporting countries. Quality is defined as the set of features of a food that leads to consumer satisfaction and includes sensory properties, shelf-life, product safety and functional properties.
The systems for the traceability of food products along specified stages of production, processing and distribution play a key role in assuring safety, quality and origin of food and are typically based on a continuous paper-trail and effective labelling. However, analytical techniques that enable the determination of the provenance of a food product provide an independent mean of control and also help to prove product authenticity, to combat fraudulent practices and to control any adulterations.
The capability to certify food origin or authenticity of a product is of significant economic importance for the agri-food stakeholders in different countries. For example, some food products (organic and/or with certifications of origin) can boast EC recognition on their label. This adds value to such products in terms of marketability and increased export value.
The present work has been developed starting from this perspective, focusing on the quality and traceability of Mediterranean fruits and their derivatives grown in Sicily.
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Meakem, Victoria. "Induced defenses in apple fruits: linking fruit chemistry, quality, and plant-insect-microbe interactions." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/99100.
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Plants synthesize a diverse array of phytochemicals in response to interactions with herbivores, pathogens, and commensal microbes. These phytochemicals may simultaneously enhance crop defense and quality, representing a potential pest management strategy. However, plant chemical responses to different types and levels of biotic interactions remain unclear, particularly in fruit tissues, and the feasibility of inducing these defenses through elicitor application in field environments also requires further examination. Thus, apples were used to 1) examine the impact of distinct communities of biotic interactions among plants, insects, and microbes on fruit phenolic chemistry, and 2) examine the impact of the phytohormones jasmonic acid (JA), salicylic acid (SA), and melatonin (M) on fruit phenolic chemistry and resistance against pests and pathogens. Ultimately, phenolic defenses were induced by fungal damage primarily in ripe pulp tissues, where there was also a positive relationship between fungal endophyte and phenolic diversity, supporting a broad hypothesis that chemical diversity may increase with biotic diversity. Additionally, two compounds were upregulated in response to fungal damage: chlorogenic acid and an unidentified benzoic acid. Elicitor applications did not affect phenolic chemistry, but the combined application of JA-SA analogues had some chemical or physical effect, as this treatment reduced emergence of the insect Rhagoletis pomonella. Thus, fruit induced defenses may be tissue-specific and subject to temporal, environmental, or genotypic variation. Overall, these chapters examined the relationship between biotic interactions and induced fruit chemistry, with the goal of improving understanding of plant-microbe-insect interactions and incorporating these interactions into more sustainable agricultural practices.Master of Science
Plants may produce a diverse array of defensive phytochemical compounds in response to interactions with herbivores, pathogens, and the microorganisms that reside within plant tissues. These phytochemicals may simultaneously improve crop defenses and quality, representing a potential agricultural management strategy. However, plant chemical responses to different types and levels of biotic interactions are not well-understood, particularly in fruit tissues, and the feasibility of activating these defenses in fruits through the application of phytohormones that regulate defense pathways as a potential management strategy also requires further examination. Thus, apples were used to 1) examine the impact of distinct communities of biotic interactions among plants, insects, and microbes on fruit chemistry, focusing on phenolics, an important class of phytochemical compounds, and 2) examine the impact of the defense-activating phytohormones jasmonic acid (JA), salicylic acid (SA), and melatonin (M) on fruit phenolic chemistry and resistance against pests and pathogens. Ultimately, phenolic defenses were activated by fungal damage primarily in ripe pulp tissues, where there was also a positive relationship between fungal endophyte and phenolic diversity, supporting a broad hypothesis that chemical diversity may increase with biotic diversity. Additionally, two compounds were produced in response to fungal damage: chlorogenic acid and an unidentified benzoic acid. Phytohormone applications did not affect phenolic chemistry, but the application of the combined JA-SA analogues had some chemical or physical effect, as this treatment reduced emergence of the insect Rhagoletis pomonella. Overall, the phytochemical defenses activated by biotic interactions in fruits may occur primarily in certain tissue types, and may also vary due to environmental conditions, time of year, or plant species. These chapters examined the relationship between fruit chemistry and biotic interactions with the goal of improving understanding of plant-microbe-insect interactions and incorporating these interactions into more sustainable agricultural practices.
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Petje, Kgomoamogodi Felix. "Determination of fruit yield and fruit quality in marula (Sclerocarya birrea subsp. caffra) selections." Diss., Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-08072009-130342.
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Mzini, Loyiso L. "Aspects of fruit size and quality in citrus." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52699.
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Thesis (MScAgric)--Stellenbosch University, 2002.ENGLISH ABSTRACT: Fruit size can be a problem in 'Clementine' mandarin and 'Valencia' orange in the Western Cape region of South Africa. Small fruit is not only unacceptable to the consumer but is also more difficult and expensive to harvest. Means of alleviating this problem is to manage the crop load. Hand thinning trials were conducted to evaluate the effect of timing and severity thereof in enhancing fruit size. The benefits of enhancing large fruit size was obtained by a heavy-thinning (60% fruitlet removed) treatment, but the actual benefits were offset by a reduction of total yield. Yield was reduced up to 30% when heavy thinning treatments were applied. No effect on early or late treatments were obtained since the trial was conducted rather late (4 to 6 weeks after the physiological fruit drop period) to obtain the desirable results. However, better packouts are expected with thinning treatments since blemished fruit are also removed. The effect of multiple 2,4-dichlorophenoxy propionic acid (dichlorprop) sprays were also evaluated on 'Nules Clemetine' mandarin. Comparing multiple sprays with a single spray, it was observed that more than one spray was no better in improving fruit size. The use of multiple dichlorprop sprays resulted in no additional yield reduction, while internal fruit quality was also not affected. The best results were obtained with dichlorprop at 50 mg. L-1 • The use of dichlorprop with different surfactants was evaluated in both 'Clementine' mandarin and 'Valencia' orange. The fruit size was increased from 50 mg. L-1 up to 100 mg. L-1 • Yield was usually not affected but, where reductions were experienced, yield of large fruit (>55 mm) was not significantly affected. In the 'Valencia' orange trials, during the first year, dichlorprop was sprayed relatively late (fruit diameter: 19 mm). No fruit size, yield and internal fruit quality effects were observed. The following year, when early and late sprays (fruit diameter at spray time = 8 and 12 mm, respectively) were evaluated, it was observed that late sprays had no effect on fruit size, whereas fruit size (48 fruit per carton) was significantly increased by early sprays. This implies that the dichlorprop effect on fruit size is during the early stages of fruit development, just after or during the late stage of the physiological fruit drop period. Yield was drastically reduced by up to 35%, which affected the actual kilograms of large fruit adversely in some treatments. Juice percentage was inconsistent and tended to be reduced by dichlorprop application. Dichlorprop tended to increase TSS slightly in year one and significantly so in year two, but did not affect the TSS:TA ratio. The use of Orchex mineral oils as surfactant at 150 mL. 100 L-1 was effective and seemingly allowed lower rates of dichlorprop to be used. Therefore, surfactants seemed to show potential in enhancing dichlorprop efficiency to reduce the application cost. The dichlorprop-sprayed fruit was used to measure carotenoid content of the rind during the later stage of fruit development. Observations indicate that dichlorprop-sprayed fruit at 50 mg. L-1 obtained better carotenoid content in both 'Clementines' mandarin and 'Valencia' orange. Also, fruit exposed to light had higher carotenoid levels as compared to fruit shaded with brown paper bags. However, dichlorprop-sprayed fruit at 100 mg. L-1 , even though exposed to light did not show significant differences with unsprayed in both shaded and exposed conditions. Therefore, no consistent effect of dichlorprop was established on total carotenoid content of the rind.
AFRIKAANSE OPSOMMING: Vruggrootte van 'Clementine' mandaryn en 'Valencia' lemoene kan 'n probleem wees in die Wes Kaap area van Suid Afrika. Klein vrugte is nie net onaanvaarbaar vir die verbruiker nie, maar is ook moeilik om te oes. Vrugdrag manipulasie is een manier om hierdie probleem te beheer. Hand uitdunningsproewe is uitgevoer om die effek van tyd en graad van uitdunning op vruggrootte te bepaal. Strawwe vruguitdunning (60% van vruggies verwyder) het groter vrugte tot gevolg gehad maar het gelei tot 'n verlaagde opbrengs. Opbrengs is tot soveel as 30% verlaag met die strawwe vruguitdunning. Vroeë en laat behandelings het egter geen effek gehad nie, aangesien die proewe te laat uitgevoer is (4 tot 6 weke na die fisiologiese vrugvalperiode) om die gewenste effek te verkry. Beter uitpak word verwag na uitdunning, aangesien vrugte met letsels ook verwyder word. Die effek van veelvuldige 2,4-dichlorofenoksie-propioonsuur (dichlorprop) spuite IS ook geëvalueer op 'Nules Clementine' mandaryn. Daar is geen verskil gevind tussen enkel en veelvuldige spuite in terme van vruggrootteverbetering nie. Die gebruik van veelvuldige dichlorprop spuite het nie tot 'n verlaging in opbrengs gelei nie, en interne vrugkwaliteit is ook nie beïnvloed me. Die beste resultate is verkry met die 50 mg. L-1 dichlorprop behandeling. Die gebruik van dichlorprop saam met verskillende benatters is op beide 'Clementine' mandaryn en 'Valencia' lemoene geëvalueer. Vruggrootte het toegeneem vanaf 50 mg. L-1 tot 100 mg. L-1 • Opbrengs was net in sekere gevalle verlaag en dan sonder 'n betekenisvolle verskil in groot-vrug produksie (>55 mm: Clementines). Tydens die eerste jaar van die 'Valencia' lemoen proef is die dichlorprop relatief laat gespuit (vrug deursneë: 19 mm). Daar was geen effek op vruggrootte, opbrengs en interne vrugkwaliteit nie. Tydens evaluasie van vroeë en laat bespuitings die volgende jaar is waargeneem dat laat bespuitings geen effek op vruggrootte gehad het nie, terwyl vruggrootte (48 vrugte per karton) betekenisvol verhoog is deur die vroeë bespuitings (Vruggrootte voor bespuiting = 8 en 12 mm, onderskeidelik). Dit impliseer dat dichlorprop se effek op vruggrootte gedurende die vroeë stadiums van vrugontwikkeling is, net na of gedurende die laat stadiums van die fisiologiese vrugvalperiode. Opbrengs is drasties verlaag deur dichlorprop, tot soveel as 35% wat die kilogram groot vrugte negatief beïnvloed het in sommige behandelings. Sappersentasie was nie konsekwent affekteer nie, maar is verlaag deur die dichlorprop bespuitings. Dichlorprop het die TSS effens verhoog in beide jare, maar het geen effek gehad op die TSS:TA verhouding nie. Die gebruik van Orchex minerale olie as benatter was effektief by 150 mL. 100 L-1 , en laat klaarblyklik die gebruik van dichlorprop by laer konsentrasies toe. Dus, kom dit voor dat benatters die potensiaal het om die effektiwiteit van dichlorprop te verbeter wat lei tot 'n verlaging in toedieningskoste. Die dichlorprop gespuite vrugte is gebruik om karotenoïed-inhoud van die skil te meet tydens die laat stadiums van vrugontwikkeling. Vrugte gespuit met dichlorprop teen 'n konsentrasie van 50 mg. L-1 het 'n beter karotenoïed-inhoud in beide 'Clementine' mandaryn en 'Valencia' lemoene tot gevolg gehad. Vrugte blootgestel aan lig het ook 'n hoër karatenoïedkonsentrasie gehad as vrugte wat met bruin papiersakke bedek was. Dichlorprop bespuite vrugte teen 100 mg. L-I, alhoewel blootgestel aan lig, het geen betekenisvolle verskil gehad in vergelyking met onbespuite vrugte nie. Dus is daar geen konsekwente effek van dichlorprop op karotenoïde inhoud van die skiI waargeneem nie.
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Kondo, Tomohiro. "Effects of Mineral Nutrients on Passion Fruit Quality." Kyoto University, 2013. http://hdl.handle.net/2433/175045.
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Kyoto University (京都大学)0048
新制・課程博士
博士(農学)
甲第17616号
農博第1978号
新制||農||1009(附属図書館)
学位論文||H25||N4737(農学部図書室)
30382
京都大学大学院農学研究科地域環境科学専攻
(主査)教授 縄田 栄治, 教授 米森 敬三, 教授 間藤 徹
学位規則第4条第1項該当
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Nuñez-Palenius, Hector Gordon. "Transformation of 'Galia' melon to improve fruit quality." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011467.
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Pathaveerat, Siwalak. "Internal fruit quality evaluation using nuclear magnetic resonance /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2002. http://uclibs.org/PID/11984.
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Yaseen, Mehwish. "Manipulation of Fruit Ripening, Quality and Storage Life in Pome Fruits Using Novel Ethylene Antagonists." Thesis, Curtin University, 2018. http://hdl.handle.net/20.500.11937/75530.
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Ethylene antagonists offer an effective way to prevent the deleterious effects of ethylene in climacteric fruits. 1-Methylcyclopropene, 1-hexylcyclopropene, (S)-(-)- limonene and trans-cinnamaldehyde were evaluated as ethylene antagonist to extend the storage life of apple and pear fruits. 1-Methylcyclopropene was most efficient followed by 1-HCP, (S)-(-)-limonene and trans-cinnamaldehyde in suppressing and delaying climacteric ethylene production, extending cold and controlled atmosphere storage life and maintaining fruit quality depending upon cultivar and storage period.
Books on the topic "Fruit quality"
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Bonavia, William J. d. 1948. and British Columbia. Dept. of Agriculture., eds. Hints to exhibitors at fall fairs. Victoria, B.C: W.H. Cullin, 1997.
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Jenks, Matthew A., and Penelope J. Bebeli, eds. Breeding for Fruit Quality. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9780470959350.
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Jenks, Matthew A., and Penelope J. Bebeli. Breeding for fruit quality. Ames, Iowa: Wiley-Blackwell, 2011.
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Jenks, Matthew A., and Penelope J. Bebeli. Breeding for fruit quality. Ames, Iowa: Wiley-Blackwell, 2011.
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1944-, Knee Michael, ed. Fruit quality and its biological basis. Sheffield, UK: Sheffield Academic Press, 2002.
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Askar, Ahmed, and Hans Treptow. Quality Assurance in Tropical Fruit Processing. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-77687-8.
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W, Jongen, ed. Fruit and vegetable processing: Improving quality. Cambridge: Woodhead Publishing, 2002.
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L, Shewfelt Robert, and Brückner Bernhard, eds. Fruit & vegetable quality: An integrated view. Lancaster, Pa: Technomic Pub. Co., 2000.
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Askar, Ahmed. Quality Assurance in Tropical Fruit Processing. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993.
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Askar, Ahmed. Quality assurance in tropical fruit processing. Berlin: Springer-Verlag, 1993.
Find full textBook chapters on the topic "Fruit quality"
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Sánchez-Moreno, Concepción, Sonia De Pascual-Teresa, Bego˜na De Ancos, and M. Pilar Cano. "Nutritional Quality of Fruits." In Handbook of Fruits and Fruit Processing, 73–84. Oxford, UK: Wiley-Blackwell, 2012. http://dx.doi.org/10.1002/9781118352533.ch5.
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Masson, Maria Lucia. "Quality of Dried Fruit Products." In Dried Fruit Products, 59–87. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003402916-4.
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Àlvarez-Fernàndez, Ana, Javier Abadía, and Anunciación Abadía. "Iron Deficiency, Fruit Yield and Fruit Quality." In Iron Nutrition in Plants and Rhizospheric Microorganisms, 85–101. Dordrecht: Springer Netherlands, 2006. http://dx.doi.org/10.1007/1-4020-4743-6_4.
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Dorais, M., A. P. Papadopoulos, and A. Gosselin. "Greenhouse Tomato Fruit Quality." In Horticultural Reviews, 239–319. Oxford, UK: John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470650806.ch5.
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Gierson, D., and A. A. Kader. "Fruit ripening and quality." In The Tomato Crop, 241–80. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-3137-4_6.
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Long, Lynn E., Gregory A. Lang, and Clive Kaiser. "Fruit ripening and harvest." In Sweet cherries, 282–303. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781786398284.0282.
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Abstract This chapter provides information on the processes that occur in the sweet cherry fruit during ripening prior to harvest. Some pre-harvest disorders, such as fruit cracking, and their management are presented. Some factors to consider during the harvesting of the fruits are also discussed, along with various harvesting techniques. Some postharvest fruit quality considerations are highlighted and the importance of postharvest temperature and humidity control and safe transport of fruits from the orchard to the packing house are pointed out.
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Thompson, A. K., R. K. Prange, R. D. Bancroft, and T. Puttongsiri. "Quality." In Controlled atmosphere storage of fruit and vegetables, 40–49. Wallingford: CABI, 2018. http://dx.doi.org/10.1079/9781786393739.0040.
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Passam, Harold C., Ioannis C. Karapanos, and Alexios A. Alexopoulos. "The Biological Basis of Fruit Quality." In Breeding for Fruit Quality, 3–38. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9780470959350.ch1.
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Pattison, Jeremy A. "Breeding for Fruit Quality in Strawberry." In Breeding for Fruit Quality, 231–46. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9780470959350.ch10.
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Emanuelli, Francesco, Juri Battilana, Laura Costantini, and M. Stella Grando. "Molecular Breeding of Grapevine for Aromatic Quality and Other Traits Relevant to Viticulture." In Breeding for Fruit Quality, 247–60. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9780470959350.ch11.
Full textConference papers on the topic "Fruit quality"
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Lantsev, V. Y., A. A. Zavrazhnov, A. I. Zavrazhnov, A. A. Zemlyanoy, and V. G. Brosalin. "FRUIT BAG." In STATE AND DEVELOPMENT PROSPECTS OF AGRIBUSINESS. DSTU-PRINT, 2020. http://dx.doi.org/10.23947/interagro.2020.1.655-658.
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The article discusses means to facilitate the manual dispute of fruits and preserve their category. The proposed picking bag provides maximum control and regulation of the flow of fruits during unloading, which preserves the quality of the fruits laid in it, provides conditions for picking the fruit with both hands, allows the emptying of the picking bag from a height, does not interfere with pickers during operation and ensures a minimum level of physical labor.
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Tomić, Jelena, Boris Rilak, Marijana Pešaković, Žaklina Karaklajić Stajić, and Svetlana M. Paunović. "COMPARATIVE STUDY OF PRODUCTIVITY AND FRUIT QUALITY OF STRAWBERRY CULTIVAR ‘SENGA SENGANA’ GROWN IN THE OPEN FIELD AND PLASTIC-GREENHOUSE." In 1st International Symposium on Biotechnology. University of Kragujevac, Faculty of Agronomy, 2023. http://dx.doi.org/10.46793/sbt28.157t.
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To identify and compare the differences in productivity and fruit quality of strawberry cultivar ‘Senga Sengana’ grown in open field and protected area fruits were harvested in 2021 in the region of Western Serbia. The yield, physical (fruit weight, dimensions, firmness), chemical (total soluble solids (TSS), total (TS) and invert sugars (IS), sucrose (SUC), titrable acids (TA), pH, sweetness index (TS/TA)) and nutritive traits (vitamin C, total phenols, total anthocyanins and antioxidative activity) of the fruits were analyzed. Significantly higher yield per area unit, fruit weight and length, TSS, sugars, organic acids, sweetness index and nutritive qulity were recorded in the fruits from protected area. Growing strawberries in a protected area, in addition to ensuring a safe yield, also has a positive effect on both the sensory and nutritional composition of the fruit.
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Scheibelmasser, Anton, Matthias Jeindl, and Gunar Nakladal. "Exotic Fruit Ripening Based on Optical Characterisation." In OCM 2021 - 5th International Conference on Optical Characterization of Materials. KIT Scientific Publishing, 2021. http://dx.doi.org/10.58895/ksp/1000128686-2.
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Re-sellers and customers in super markets expect perfect quality fruit in terms of ripeness, sweetness, taste and a lack of inner and outer defects. Especially exotic fruits provide many challenges due to long transport routes and the logistics of ripening processes. Optical characterisation of the fruits could help ensure the required quality. A combination of visual and infrared light evaluation techniques allows the measurement of quality parameters that support the control system of the reseller’s store and the delivery logistics to the super market. For the inspection of chemical fruit characteristics (e.g. dry matter, sugar content), a hyperspectral near-infrared sensor is used. Additionally, an RGB camera is responsible for the visual defect analysis. Based on this measurement principle, a ripening control machine was developed and tested in daily business, successfully.
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Satpute, Manali R., and Sumati M. Jagdale. "Automatic fruit quality inspection system." In 2016 International Conference on Inventive Computation Technologies (ICICT). IEEE, 2016. http://dx.doi.org/10.1109/inventive.2016.7823207.
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Zhang, Xiancong, Yanan Wang, Jun Wang, and Xun Wang. "Effects of fruit thinning on blueberry fruit maturation and quality." In 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/ifeesm-17.2018.394.
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Ueno, Shigeaki, Rei Iijima, Mari Harada, Hsiuming Liu, Reiko Shimada, and Ken Fukami. "Effect of saccharide additives on dehydration–drying kinetics and quality properties of dried kiwi fruit products." In 21st International Drying Symposium. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/ids2018.2018.7487.
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The effects of saccharide additives on the dehydration and drying properties as well as the quality properties of dried kiwi fruit products were investigated. Sliced kiwi fruits were soaked and dehydrated in citric acid, glucose, sucrose and the pH-adjusted sugar solutions, individually. Osmotic dehydration and drying kinetic parameters were calculated using exponential models. Drying rate constants and water activities of dried kiwi fruits with osmotic dehydration were superior to those without osmotic dehydration. Soaking solutions with a lower pH led to a decrease in lightness. However, soaking sokution pH had no significant effect on the water activity or drying kinetics. Keywords: drying; kinetics; kiwi fruit; osmotic dehydration
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Wood, Delilah F., Syed H. Imam, William J. Orts, and Gregory M. Glenn. "Fresh fruit: microstructure, texture, and quality." In SPIE Scanning Microscopy, edited by Michael T. Postek, Dale E. Newbury, S. Frank Platek, and David C. Joy. SPIE, 2009. http://dx.doi.org/10.1117/12.821351.
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Mo, Fan, Cong Ge, Yanling Li, Hao-Ru Tang, Qing Chen, Bo Sun, Yong Zhang, and Ya Luo. "Abscisic Acid Affects Strawberry Fruit Quality." In Proceedings of the 2018 International Conference on Management, Economics, Education, Arts and Humanities (MEEAH 2018). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/meeah-18.2018.4.
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Ansari, Md Zaheer, Preeti Deepika Minz, and A. K. Nirala. "Fruit quality evaluation using biospeckle techniques." In 2012 1st International Conference on Recent Advances in Information Technology (RAIT). IEEE, 2012. http://dx.doi.org/10.1109/rait.2012.6194540.
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Ray, Partha Pratim, Shubham Pradhan, Roshan Kumar Sharma, Animesh Rasaily, Abhinav Swaraj, and Ashish Pradhan. "IoT based fruit quality measurement system." In 2016 Online International Conference on Green Engineering and Technologies (IC-GET). IEEE, 2016. http://dx.doi.org/10.1109/get.2016.7916620.
Full textReports on the topic "Fruit quality"
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Bennett, Alan B., Arthur A. Schaffer, Ilan Levin, Marina Petreikov, and Adi Doron-Faigenboim. Manipulating fruit chloroplasts as a strategy to improve fruit quality. United States Department of Agriculture, January 2013. http://dx.doi.org/10.32747/2013.7598148.bard.
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The Original Objectives were modified and two were eliminated to reflect the experimental results: Objective 1 - Identify additional genetic variability in SlGLK2 and IPin wild, traditional and heirloom tomato varieties Objective 2 - Determine carbon balance and horticultural characteristics of isogenic lines expressing functional and non-functional alleles of GLKsand IP Background: The goal of the research was to understand the unique aspects of chloroplasts and photosynthesis in green fruit and the consequences of increasing the chloroplast capacity of green fruit for ripe fruit sugars, yield, flavor and nutrient qualities. By focusing on the regulation of chloroplast formation and development solely in fruit, our integrated knowledge of photosynthetic structures/organs could be broadened and the results of the work could impact the design of manipulations to optimize quality outputs for the agricultural fruit with enhanced sugars, nutrients and flavors. The project was based on the hypothesis that photosynthetic and non-photosynthetic plastid metabolism in green tomato fruit is controlled at a basal level by light for minimal energy requirements but fruit-specific genes regulate further development of robust chloroplasts in this organ. Our BARD project goals were to characterize and quantitate the photosynthesis and chloroplast derived products impacted by expression of a tomato Golden 2- like 2 transcription factor (US activities) in a diverse set of 31 heirloom tomato lines and examine the role of another potential regulator, the product of the Intense Pigment gene (IP activities). Using tomato Golden 2-like 2 and Intense Pigment, which was an undefined locus that leads to enhanced chloroplast development in green fruit, we sought to determine the benefits and costs of extensive chloroplast development in fruit prior to ripening. Major conclusions, solutions, achievements: Single nucleotide polymorphisms in the promoter, coding and intronicSlGLK2 sequences of 20 heirloom tomato lines were identified and three SlGLK2 promoter lineages were identified; two lineages also had striped fruit variants. Lines with striped fruit but no shoulders were not identified. Green fruit chlorophyll and ripe fruit soluble sugar levels were measured in 31 heirloom varieties and fruit size correlates with ripe fruit sugars but dark shoulders does not. A combination of fine mapping, recombinant generation, RNAseq expression and SNP calling all indicated that the proposed localization of a single locus IP on chr 10 was incorrect. Rather, the IP line harbored 11 separate introgressions from the S. chmielewskiparent, scattered throughout the genome. These introgressions harbored ~3% of the wild species genome and no recombinant consistently recovered the IP parental phenotype. The 11 introgressions were dissected into small combinations in segregating recombinant populations. Based on these analyses two QTL for Brix content were identified, accounting for the effect of increased Brix in the IP line. Scientific and agricultural implications: SlGLK2 sequence variation in heirloom tomato varieties has been identified and can be used to breed for differences in SlGLK2 expression and possibly in the green striped fruit phenotype. Two QTL for Brix content have been identified in the S. chmielewskiparental line and these can be used for increasing soluble solids contents in breeding programs.
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Schaffer, Arthur A., D. Mason Pharr, Joseph Burger, James D. Burton, and Eliezer Zamski. Aspects of Sugar Metabolism in Melon Fruit as Determinants of Fruit Quality. United States Department of Agriculture, September 1994. http://dx.doi.org/10.32747/1994.7568770.bard.
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The cucurbit family, including melon, translocates the galactosyl-sucrose oligosaccharides, raffinose and stachyose, in addition to sucrose, from the source leaves to the fruit sink. The metabolism of these photoassimilates in the fruit sink controls fruit growth and development, including the horticulturally important phenomenon of sucrose accumulation, which determines melon fruit sweetness. During this research project we have characterized the complete pathway of galactosyl sucrose metabolism in developing fruit, from before anthesis until maturity. We have also compared the metabolic pathway in scurose accumulating genotypes, as compared to non-accumulating genotypes. Furthermore, we studied the pathway in different fruit tissues, in response to pollination, and also analyzed the response of the individual steps of the pathway to perturbations such as low temperature and leaf removal. The results of our studies have led to the conclusion that generally galactosyl-sucrose metabolism functions as a coordinately controlled pathway. In one case, as an immediate response to the absence of pollination, the activity of a single enzyme, UDPglu pyrophosphorylase, was drastically reduced. However, during young fruit development, sucrose accumulation, and in response to perturbations of the system, groups of enzymes, rather than single enzymes, respond in a concerted manner. Our research has characterized in detail the initial enzymes of galactosyl-sucrose metabolism, including the galactosidases, galactokinase and the UDPgal- and UDPglu pyrophosphorylases. We have discovered a novel alkaline a-galactoside which hydrolyzes both stachyose and reaffinose and thereby may have solved the dilemma of cytosolic-sucrose metabolism, since prior to this research there was no known alkaline a-galactosidase capable of hydrolyzing raffinose.
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Paran, Ilan, and Allen Van Deynze. Regulation of pepper fruit color, chloroplasts development and their importance in fruit quality. United States Department of Agriculture, January 2014. http://dx.doi.org/10.32747/2014.7598173.bard.
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Pepper exhibits large natural variation in chlorophyll content in the immature fruit. To dissect the genetic and molecular basis of this variation, we conducted QTL mapping for chlorophyll content in a cross between light and dark green-fruited parents, PI 152225 and 1154. Two major QTLs, pc1 and pc10, that control chlorophyll content by modulation of chloroplast compartment size in a fruit-specific manner were detected in chromosomes 1 and 10, respectively. The pepper homolog of GOLDEN2- LIKE transcription factor (CaGLK2) was found as underlying pc10, similar to its effect on tomato fruit chloroplast development. A candidate gene for pc1was found as controlling chlorophyll content in pepper by the modulation of chloroplast size and number. Fine mapping of pc1 aided by bulked DNA and RNA-seq analyses enabled the identification of a zinc finger transcription factor LOL1 (LSD-One-Like 1) as a candidate gene underlying pc1. LOL1 is a positive regulator of oxidative stress- induced cell death in Arabidopsis. However, over expression of the rice ortholog resulted in an increase of chlorophyll content. Interestingly, CaAPRR2 that is linked to the QTL and was found to affect immature pepper fruit color in a previous study, did not have a significant effect on chlorophyll content in the present study. Verification of the candidate's function was done by generating CRISPR/Cas9 knockout mutants of the orthologues tomato gene, while its knockout experiment in pepper by genome editing is under progress. Phenotypic similarity as a consequence of disrupting the transcription factor in both pepper and tomato indicated its functional conservation in controlling chlorophyll content in the Solanaceae. A limited sequence diversity study indicated that null mutations in CaLOL1 and its putative interactorCaMIP1 are present in C. chinensebut not in C. annuum. Combinations of mutations in CaLOL1, CaMIP1, CaGLK2 and CaAPRR2 are required for the creation of the extreme variation in chlorophyll content in Capsicum.
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Arazi, Tzahi, Vivian Irish, and Asaph Aharoni. Micro RNA Targeted Transcription Factors for Fruit Quality Improvement. United States Department of Agriculture, July 2008. http://dx.doi.org/10.32747/2008.7592651.bard.
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Fruits are unique to flowering plants and represent an important component of human and animal diets. Development and maturation of tomato fruit is a well-programmed process, and yet, only a limited number of factors involved in its regulation have been characterized. Micro-RNAs (miRNAs) are small, endogenous RNAs that regulate gene expression in animals and plants. Plant miRNAs have a vital role in the generation of plant forms through post-transcriptional regulation of the accumulation of developmental regulators, especially transcription factors. Recently, we and others have demonstrated that miRNAs and other type of small RNAs are expressed in tomato fruit, and target putative transcription factors during its development and maturation. The original objectives of the approved proposal were: 1. To identify fruit miRNA transcription factor target genes through a bioinformatic approach. 2. To identify fruit miRNA transcription factor target genes up-regulated in tomato Dicer-like 1 silenced fruit. 3. To establish the biological functions of selected transcription factors and examine their utility for improving fleshy fruit quality trait. This project was approved by BARD as a feasibility study to allow initial experiments to peruse objective 2 as described above in order to provide initial evidence that miRNAs do play a role in fruit development. The approach planned to achieve objective 2, namely to identify miRNA transcription factor targets was to clone and silence the expression of a tomato DCL1 homolog in different stages of fruit development and examine alterations to gene expression in such a fruit in order to identify pathways and target genes that are regulated by miRNA via DCL1. In parallel, we characterized two transcription factors that are regulated by miRNAs in the fruit. We report here on the cloning of tomato DCL1 homolog, characterization of its expression in fruit flesh and peel of wild type and ripening mutants and generation of transgenic plants that silence SlDCL1 specifically in the fruit. Our results suggest that the tomato homolog of DCL1, which is the major plant enzyme involved in miRNA biogenesis, is present in fruit flesh and peel and differentially expressed during various stages of fruit development. In addition, its expression is altered in ripening mutants. We also report on the cloning and expression analysis of Sl_SBP and Sl_ARF transcription factors, which serve as targets of miR157 and miR160, respectively. Our data suggest that Sl_SBP levels are highest during fruit ripening supporting a role for this gene in that process. On the other hand Sl_ARF is strongly expressed in green fruit up to breaker indicating a role for that gene at preripening stage which is consistent with preliminary in_situ analyses that suggest expression in ovules of immature green fruit. The results of this feasibility study together with our previous results that miRNAs are expressed in the fruit indeed provide initial evidence that these regulators and their targets play roles in fruit development and ripening. These genes are expected to provide novel means for genetic improvement of tomato fleshy fruit.
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Galili, Naftali, Roger P. Rohrbach, Itzhak Shmulevich, Yoram Fuchs, and Giora Zauberman. Non-Destructive Quality Sensing of High-Value Agricultural Commodities Through Response Analysis. United States Department of Agriculture, October 1994. http://dx.doi.org/10.32747/1994.7570549.bard.
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The objectives of this project were to develop nondestructive methods for detection of internal properties and firmness of fruits and vegetables. One method was based on a soft piezoelectric film transducer developed in the Technion, for analysis of fruit response to low-energy excitation. The second method was a dot-matrix piezoelectric transducer of North Carolina State University, developed for contact-pressure analysis of fruit during impact. Two research teams, one in Israel and the other in North Carolina, coordinated their research effort according to the specific objectives of the project, to develop and apply the two complementary methods for quality control of agricultural commodities. In Israel: An improved firmness testing system was developed and tested with tropical fruits. The new system included an instrumented fruit-bed of three flexible piezoelectric sensors and miniature electromagnetic hammers, which served as fruit support and low-energy excitation device, respectively. Resonant frequencies were detected for determination of firmness index. Two new acoustic parameters were developed for evaluation of fruit firmness and maturity: a dumping-ratio and a centeroid of the frequency response. Experiments were performed with avocado and mango fruits. The internal damping ratio, which may indicate fruit ripeness, increased monotonically with time, while resonant frequencies and firmness indices decreased with time. Fruit samples were tested daily by destructive penetration test. A fairy high correlation was found in tropical fruits between the penetration force and the new acoustic parameters; a lower correlation was found between this parameter and the conventional firmness index. Improved table-top firmness testing units, Firmalon, with data-logging system and on-line data analysis capacity have been built. The new device was used for the full-scale experiments in the next two years, ahead of the original program and BARD timetable. Close cooperation was initiated with local industry for development of both off-line and on-line sorting and quality control of more agricultural commodities. Firmalon units were produced and operated in major packaging houses in Israel, Belgium and Washington State, on mango and avocado, apples, pears, tomatoes, melons and some other fruits, to gain field experience with the new method. The accumulated experimental data from all these activities is still analyzed, to improve firmness sorting criteria and shelf-life predicting curves for the different fruits. The test program in commercial CA storage facilities in Washington State included seven apple varieties: Fuji, Braeburn, Gala, Granny Smith, Jonagold, Red Delicious, Golden Delicious, and D'Anjou pear variety. FI master-curves could be developed for the Braeburn, Gala, Granny Smith and Jonagold apples. These fruits showed a steady ripening process during the test period. Yet, more work should be conducted to reduce scattering of the data and to determine the confidence limits of the method. Nearly constant FI in Red Delicious and the fluctuations of FI in the Fuji apples should be re-examined. Three sets of experiment were performed with Flandria tomatoes. Despite the complex structure of the tomatoes, the acoustic method could be used for firmness evaluation and to follow the ripening evolution with time. Close agreement was achieved between the auction expert evaluation and that of the nondestructive acoustic test, where firmness index of 4.0 and more indicated grade-A tomatoes. More work is performed to refine the sorting algorithm and to develop a general ripening scale for automatic grading of tomatoes for the fresh fruit market. Galia melons were tested in Israel, in simulated export conditions. It was concluded that the Firmalon is capable of detecting the ripening of melons nondestructively, and sorted out the defective fruits from the export shipment. The cooperation with local industry resulted in development of automatic on-line prototype of the acoustic sensor, that may be incorporated with the export quality control system for melons. More interesting is the development of the remote firmness sensing method for sealed CA cool-rooms, where most of the full-year fruit yield in stored for off-season consumption. Hundreds of ripening monitor systems have been installed in major fruit storage facilities, and being evaluated now by the consumers. If successful, the new method may cause a major change in long-term fruit storage technology. More uses of the acoustic test method have been considered, for monitoring fruit maturity and harvest time, testing fruit samples or each individual fruit when entering the storage facilities, packaging house and auction, and in the supermarket. This approach may result in a full line of equipment for nondestructive quality control of fruits and vegetables, from the orchard or the greenhouse, through the entire sorting, grading and storage process, up to the consumer table. The developed technology offers a tool to determine the maturity of the fruits nondestructively by monitoring their acoustic response to mechanical impulse on the tree. A special device was built and preliminary tested in mango fruit. More development is needed to develop a portable, hand operated sensing method for this purpose. In North Carolina: Analysis method based on an Auto-Regressive (AR) model was developed for detecting the first resonance of fruit from their response to mechanical impulse. The algorithm included a routine that detects the first resonant frequency from as many sensors as possible. Experiments on Red Delicious apples were performed and their firmness was determined. The AR method allowed the detection of the first resonance. The method could be fast enough to be utilized in a real time sorting machine. Yet, further study is needed to look for improvement of the search algorithm of the methods. An impact contact-pressure measurement system and Neural Network (NN) identification method were developed to investigate the relationships between surface pressure distributions on selected fruits and their respective internal textural qualities. A piezoelectric dot-matrix pressure transducer was developed for the purpose of acquiring time-sampled pressure profiles during impact. The acquired data was transferred into a personal computer and accurate visualization of animated data were presented. Preliminary test with 10 apples has been performed. Measurement were made by the contact-pressure transducer in two different positions. Complementary measurements were made on the same apples by using the Firmalon and Magness Taylor (MT) testers. Three-layer neural network was designed. 2/3 of the contact-pressure data were used as training input data and corresponding MT data as training target data. The remaining data were used as NN checking data. Six samples randomly chosen from the ten measured samples and their corresponding Firmalon values were used as the NN training and target data, respectively. The remaining four samples' data were input to the NN. The NN results consistent with the Firmness Tester values. So, if more training data would be obtained, the output should be more accurate. In addition, the Firmness Tester values do not consistent with MT firmness tester values. The NN method developed in this study appears to be a useful tool to emulate the MT Firmness test results without destroying the apple samples. To get more accurate estimation of MT firmness a much larger training data set is required. When the larger sensitive area of the pressure sensor being developed in this project becomes available, the entire contact 'shape' will provide additional information and the neural network results would be more accurate. It has been shown that the impact information can be utilized in the determination of internal quality factors of fruit. Until now,
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Dilley, Craig A., and Gail R. Nonnecke. Soil Quality Interest Survey of Iowa Small Fruit Growers. Ames: Iowa State University, Digital Repository, 2007. http://dx.doi.org/10.31274/farmprogressreports-180814-257.
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Baugher, Tara A. Growth, yield and fruit quality of 'delicious' apple strains. West Virginia University Agricultural Experiment Station, January 1990. http://dx.doi.org/10.33915/agnic.596.
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Baugher, Tara A. Growth, yield and fruit quality of 'delicious' apple strains. West Virginia University Agricultural Experiment Station, January 1990. http://dx.doi.org/10.33915/agnic.702.
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Delwiche, Michael, Yoav Sarig, Antony Dodd, and Uri Peiper. Electronic Sorting and Grading of Fruit for Quality and Maturity. United States Department of Agriculture, March 1990. http://dx.doi.org/10.32747/1990.7695830.bard.
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Yu, Xiaoshuang. Effect of Atmospheric Cold Plasma Treatment on Fruit Juice Quality. Ames (Iowa): Iowa State University, January 2020. http://dx.doi.org/10.31274/cc-20240624-580.
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