Relevant bibliographies by topics / Stamen development

Academic literature on the topic 'Stamen development'

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Published: 6 September 2023

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Journal articles on the topic "Stamen development"

1

Orlovich, D. A., A. N. Drinnan, and P. Y. Ladiges. "Floral development in Melaleuca and Callistemon (Myrtaceae)." Australian Systematic Botany 11, no. 6 (1998): 689. http://dx.doi.org/10.1071/sb97041.

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Floral development of seven species of Melaleuca and four species of Callistemon is compared. The multistaminate fascicles of Melaleuca develop from stamen primordia initiated on antepetalous pre-staminal bulges (PSBs); the resultant bundles of stamens become separated by hypanthial expansion as the flower bud enlarges. In most species of Callistemon examined the stamen primordia are initiated directly on the floral apex, and the stamens are distributed evenly around the hypanthium at anthesis. The possession of large and prominent PSBs, and thus stamen fascicles, is a feature of most species of Melaleuca and their total absence is a feature of most species of Callistemon; however, there is a continuum between these two extremes. Several taxa of both genera exhibit intermediate morphology. In C. glaucus (Bonpl.) Sweet, small but distinct PSBs develop, which influence antepetalous stamen groups that remain contiguous at anthesis. This also occurred in M. leucadendra (L.) L. This variable expression of PSBs is the result of differences in the timing of stamen initiation. Other variable features are determined by the space available for primordium initiation and the patterns of growth and expansion of the developing flower.
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Yu, Yan, Zheng Song Peng, Ji Peng Qu, Zhen Yong Chen, Shu Hong Wei, Ming Li Liao, Li Zhang, and Zai Jun Yang. "Comparative metabolomics and transcriptomics of pistils, stamens and pistilloid stamens widen key knowledge of pistil and stamen development in wheat." Czech Journal of Genetics and Plant Breeding 56, No. 1 (December 9, 2019): 24–33. http://dx.doi.org/10.17221/70/2019-cjgpb.

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To examine the role of metabolites in wheat stamen and pistil development, metabolomic analyses of pistilloid stamens (PS), pistils (P), and stamens (S) from a novel wheat mutant homologous transformation sterility-1 (HTS-1) and controls from their sib-line CSTP were conducted using base gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS). Then, the metabolomic data were integrated with previously published transcriptomic data and analysed. In total, 141 annotated metabolites were determined from P, PS and S tissues by comparison with reference standards. A total of 90, 93 and 18 different metabolites were identified in S vs. PS, S vs. P and P vs. PS, respectively. Among the different metabolites, 80 may be associated with stamen and pistil growth. Using integration evaluations of both the previous transcriptome data and the 80 various metabolites, we found two perturbed pathways that significantly affect flower development in plants, namely, the phenylpropanoid biosynthesis and cysteine and methionine metabolism. The ethylene synthesis pathway, one key branch of the cysteine and methionine metabolic pathways, could have a pivotal role in pistillody growth involving HTS-1. We found two key enzyme genes in the ethylene synthesis pathway (the SAM synthase gene and the ACC synthase gene) that have higher expression levels in stamens than in pistilloid stamens or pistils. We speculate, that the decrease in ethylene content during stamen development leads to pistillody traits in HTS-1. This study helps elucidate the molecular mechanisms underlying stamen and pistil growth in wheat.
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Pylatuik, Jeffrey D., Peta C. Bonham-Smith, and Arthur R. Davis. "The additional stamens of flo10-1 mutants of Arabidopsis thaliana are compromised in production and viability of pollen." Canadian Journal of Botany 76, no. 10 (October 1, 1998): 1733–42. http://dx.doi.org/10.1139/b98-132.

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flo10-1 (superman-2) is a floral mutant in Arabidopsis thaliana that normally produces female sterile flowers. This phenotypic aberration results from a combination of increased stamen number and reduced or abnormal carpels that are nonfunctional. The flowers of flo10-1 contain two lateral and four median stamens, as seen in wild-type plants; however, they also contain several additional stamens. All stamen types have been examined with respect to frequency and location within the flower. The amount of pollen produced from each of the three types of stamens of flo10-1 and the viability of this pollen were also examined and compared with wild-type (cv. Columbia) to determine the consequences of this mutation on male fertility. Both the lateral and median stamens of flo10-1 and wild-type plants produced similar amounts of pollen per stamen and demonstrated no significant difference in viability. Per stamen, the additionals of flo10-1 produced significantly less pollen than those of the laterals and medians. Furthermore, the pollen produced from these additional stamens was significantly less viable. Although less abundant and viable, pollen produced by additional stamens can effectively fertilize ovules, producing normal, healthy plants.Key words: pollen (viability, production), stamen, male fertility, flower development, Arabidopsis thaliana, flo10-1.
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Liu, Xiatong, Tianfeng Liu, Chong Zhang, Xiaorui Guo, Song Guo, Hai Lu, Hui Li, and Zailiu Li. "Transcriptome Profile Analysis Reveals the Regulation Mechanism of Stamen Abortion in Handeliodendron bodinieri." Forests 12, no. 8 (August 11, 2021): 1071. http://dx.doi.org/10.3390/f12081071.

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Handeliodendron bodinieri has unisexual flowers with aborted stamens in female trees, which can be used to study unisexual flower development in tree species. To elucidate the molecular mechanism of stamen abortion underlying sex differentiation, the stage of stamen abortion was determined by semi-thin sections; results showed that stamen abortion occurred in stage 6 during anther development. In addition, differentially expressed transcripts regulating stamen abortion were identified by comparing the transcriptome of female flowers and male flowers with RNA-seq technique. The results showed that 14 genes related to anther development and meiosis such as HbGPAT, HbAMS, HbLAP5, HbLAP3, and HbTES were down-regulated, and HbML5 was up-regulated. Therefore, this information will provide a theoretical foundation for the conservation, breeding, scientific research, and application of Handeliodendron bodinieri.
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Liu, Lin, Yanchao Guo, Zhicheng Wu, Haoran Ren, Yunhe Jiang, Nan Ma, Junping Gao, and Xiaoming Sun. "RhAGL24 Regulating Auxin-Related Gene RhARF18 Affects Stamen Petaloidy in Rose." Horticulturae 8, no. 5 (May 6, 2022): 407. http://dx.doi.org/10.3390/horticulturae8050407.

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AGAMOUS-LIKE 24 (AGL24) is a key gene regulating floral transition, but its involvement in flower organ identity remains largely unknown. In this study, we found that RhAGL24 is strongly related to petal and stamen development in rose. Its expression increases rapidly at the petal primordium development stage and maintains a high level until the complete differentiation stage. RhAGL24 silencing increases the number of malformed petals and decreases the number of stamens, indicating that this gene affects stamen petaloidy. RhAG (AGAMOUS), a class C gene associated with petal and stamen development, is downregulated in RhAGL24-silenced plants. Moreover, we found that RhAGL24 could directly bind to the promoter region of RhARF18 (AUXIN RESPONSE FACTORS 18), a regulator of RhAG. Our results suggested that RhAGL24-RhARF18 module regulates stamen petaloidy in rose and provide new insights into the function of AGL24 for plants.
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Vanvinckenroye, P. F., L. P. Ronse Decraene, and E. F. Smets. "The floral development of Monococcus echinophorus (Phytolaccaceae)." Canadian Journal of Botany 75, no. 11 (November 1, 1997): 1941–50. http://dx.doi.org/10.1139/b97-906.

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The floral ontogeny of the monotypic genus Monococcus (Phytolaccaceae) is investigated with the scanning electron microscope. Flowers arise on pendent racemes and are preceded by a bract and two bracteoles arising successively. In both staminate and pistillate flowers four sepals are incepted in diagonal position. In the staminate flowers four alternisepalous stamens are initiated successively. Further stamen inception occurs centrifugally and runs concomitant with peripheral growth of the receptacle. This centrifugal stamen initiation is interpreted phylogenetically as a secondary increase and is expressed by the appearance of four triplets. Initiation of a variable number of outermost stamens (0–8) occurs mostly in the latero-abaxial region of the flower. In staminate flowers there is no trace of a gynoecium. In pistillate flowers a gynoecium primordium arises centrally and grows into a monocarpellate structure. Later, hooked bristles arise on the carpel flanks while a short style is produced bearing a distal tangle of long hairs. A close relationship of Monococcus with Petiveria is confirmed; similarities include the median position of the prophylls, the diagonal position of four sepals, the sequential inception of four alternisepalous stamens, and the fruits with adaptations for exozoochory. Key words: androecium, floral ontogeny, Monococcus, Phytolaccaceae, Rivinoideae.
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Charlton, W. A. "Studies in the Alismataceae. IX. Development of the flower in Ranalisma humile." Canadian Journal of Botany 69, no. 12 (December 1, 1991): 2790–96. http://dx.doi.org/10.1139/b91-349.

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The solitary flower of Ranalisma humile has three sepals, three petals, 8–12 stamens, and numerous carpels. The first six stamens appear to arise in pairs associated with the petal primordia. With respect to the perianth and the first six stamens, the flower conforms to the basic trimerous pattern detected in other Alismatalean flowers, but it differs in other aspects of development. Organogenesis is unidirectional during the period of sepal and petal initiation, since both sepal and petal initiation occur first on the same side of the flower bud. After the initiation of the first six stamens there is no evidence that subsequent organs are initiated in any semblance of a trimerous pattern. The transition from stamen to carpel initiation occurs at some point after the initiation of the first six stamens, but it does not occur at a fixed point. There are six organogenetic sites above and alternating with the first six stamens, and these may be occupied indifferently by stamen or carpel primorida. The sequence of initiation of further carpel primordia is hard to define, but ultimately carpels appear to be arranged spirally. The features of floral organogenesis are discussed in relation to the position of Ranalisma among the Alismatales. Key words: flower, organogenesis, symmetry, unidirectional development, Ranalisma, Alismataceae, Alismatales.
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Drinnan, AN, and PY Ladiges. "Floral development in the 'Symphyomyrtus group' of Eucalypts (Eucalyptus: Myrtaceae)." Australian Systematic Botany 4, no. 3 (1991): 553. http://dx.doi.org/10.1071/sb9910553.

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Floral development is described in selected species of informal subgenus Symphyomyrtus (Pryor and Johnson 1971). The corolline operculum in most species is equivalent to those of informal subgenera Eudesmia, Idiogenes (E. cloëziana) and Monocalyptus. It is formed by growth centre continuity, and shows characters consistent with the dorsal components of Angophora and bloodwood corolline parts. Stamen primordia form on a corolline buttress that develops into the stemonophore of the mature flower. This feature is a synapomorphy for Symphyomyrtus sens. strict., Eudesmia, Idiogenes and Monocalyptus. Eucalyptus microcoiys has the plesiomorphic conditions of four free imbricate petals that show no evidence of compound development, and stamens arising directly on the floral apex, not on a stemonophore precursor. The apparent bundling of stamens is a result of differential bud growth, and bears only a superficial resemblance to stamen groups in Eudesmia eucalypts. The corollas of E. brachyandra (informal subgenus Telocalyptus) and E. guilfoylei (Symphyomyrtus) also consist of free, simple petals, but the unavailability of early developmental stages precludes a complete interpretation of these and the remaining three species of Telocalyptus.
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Charlton, W. A. "Studies in the Alismataceae. X. Floral organogenesis in Luronium natans (L.) Raf." Canadian Journal of Botany 77, no. 11 (January 30, 2000): 1560–68. http://dx.doi.org/10.1139/b99-105.

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Floral organogenesis of Luronium natans (L.) Raf. occurs at first in an alternating trimerous pattern typical of Alismataceae, with the formation of three sepals, then three bulges, corresponding to the petal-stamen primordia described in some other Alismataceae, alternating with the sepals. A petal is initiated on each bulge and a pair of stamens is initiated either on it or close to it. After this, development no longer follows a trimerous plan. Six carpels are initiated in positions alternating with the six stamens, and further carpels may then arise above and between the first six. The carpels ultimately lie in a whorled arrangement if there are only six; if more, they may appear whorled or irregularly arranged. After the initiation of the stamen pairs, floral organ primordia appear simply to be positioned between pre-existing primordia as in other phyllotactic systems. It is suggested that the number of carpel primordia formed is probably determined by the size of primordia relative to the floral apex, and the extent of continued growth of the floral apex. Luronium reinforces the concept that a form of trimery is fundamental for the Alismataceae up to the formation of three stamen pairs and adds to the possibilities for variation after this point. It is suggested for the Alismataceae in general that, according to taxon, trimerous development may be terminated at any point after the initiation of the stamen pairs, and after this the primordia are positioned individually in relation to pre-existing primordia. The switch from stamen to carpel initiation is not necessarily correlated with these phyllotactic changes.
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Acosta, Ivan F., and Marine Przybyl. "Jasmonate Signaling during Arabidopsis Stamen Maturation." Plant and Cell Physiology 60, no. 12 (October 25, 2019): 2648–59. http://dx.doi.org/10.1093/pcp/pcz201.

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Abstract The last stages of stamen development, collectively called stamen maturation, encompass pollen viability, filament elongation and anther dehiscence or opening. These processes are essential for male fertility in Arabidopsis and require the function of jasmonate signaling. There is a good understanding of jasmonate synthesis, perception and transcriptional outputs in Arabidopsis stamens. In addition, the spatiotemporal localization of jasmonate signaling components at the tissue and cellular levels has started to emerge in recent years. However, the ultimate cellular functions activated by jasmonate to promote stamen maturation remain unknown. The hormones auxin and gibberellin have been proposed to control the activation of jasmonate synthesis to promote stamen maturation, although we hypothesize that this action is rather indirect. In this review, we examine these different areas, attempt to clarify some confusing aspects found in the literature and raise testable hypothesis that may help to further understand how jasmonate controls male fertility in Arabidopsis.
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Dissertations / Theses on the topic "Stamen development"

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Feng, Xiaoqi. "Cell specification and proliferation during stamen development in Arabidopsis Thaliana." Thesis, University of Oxford, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540240.

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Ethington, Kalene Mears. "Developmental Stages Associated with Organizational Learning: An Instrument Development Study." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/8287.

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Background: Previous research has identified four distinct developmental stages associated with organizational learning in high-performing hospital units: identity and ownership, team and respect, accountability and support, and reliability and sustainability. We designed a research instrument to measure these constructs. The purpose of this thesis was to establish the content and predictive validity of this instrument.Methods: The Organizational Learning Development Instrument (OLDI) consists of a total of 35 items in Likert-scale format. Item-level and instrument-level content validity were assessed using three cycles of cognitive interviewing with 28 nurses, and eight expert ratings. The OLDI was administered to nurses in Magnet® hospitals via a web-based survey. National Database of Nursing Quality Indicators (NDNQI) and Hospital Consumer Assessment of Healthcare Providers and Systems (HCAHPS) reports were used for comparison of hospital performance. Predictive validity was tested using multiple linear regression. Based on a power analysis for multiple linear regression, reaching 80% power, with a medium effect size of 0.15, an alpha of 0.05, and five predictor variables, the target sample size was 92 hospital units.Results: Results from 63 inpatient units in 11 Magnet® hospitals were used. The scale- level content validity for this instrument was 0.95 and item-level content validity index scores ranged from 0.86 to 1.0, suggesting excellent content validity. No significant relationships were found between OLDI results and NDNQI measures. Significant correlations (P<.05) were found between several OLDI constructs and HCAHPS composites.Discussion: Correlations with HCAHPS scores help validate the OLDI, as well as the theory underlying the instrument. The OLDI may not have predicted NDNQI measures due to a lack of instrument sensitivity or because NDNQI results are strongly influenced by other factors. Nurse managers can use the OLDI to predict unit performance related to patient satisfaction and to determine actions that may improve unit performance. Replicating this study with a larger sample size and more diverse hospital performance and more uniform unit type could further validate this instrument.
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Ноздрунов, Володимир Андрійович. "The Stages of Web Application Development." Thesis, Київський національний університет технологій та дизайну, 2017. https://er.knutd.edu.ua/handle/123456789/7378.

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McKechnie, Allan. "The use of developmental stages as a model for addressing and assessing spiritual formation and maturity." Theological Research Exchange Network (TREN), 2008. http://www.tren.com/search.cfm?p046-0069.

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McKechnie, Allan D. "The use of developmental stages as a model for addressing and assessing spiritual formation and maturity." St. Paul, MN : Bethel Seminary, 2008. http://dx.doi.org/10.2986/tren.046-0069.

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Fisher, W. D., and E. J. Pegelow. "Heat Units and Stages of Plant Development." College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/219831.

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Harrison, Andrew J. "The development and application of biomechanical analysis techniques for evaluation of developmental stages in vertical jump." Thesis, University of Salford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265526.

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Teixeira, Rita. "Developmental studies of cytoplasmic male-sterile Brassica napus lines /." Uppsala : Dept. of Plant Biology and Forest Genetics, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/200508.pdf.

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Civan, Isilay. "Assessment and enhancement of decision-making models used for the pre-development stages of office developments in turkey." Diss., Texas A&M University, 2003. http://hdl.handle.net/1969.1/5809.

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Real estate development involves many complex, dynamic, and uncertain elements. In the pre-development stage, greater uncertainties result from the fact that the space being considered has not yet been created. Considering both the inherent characteristics of the real estate and the inefficiency of the market it operates in, any aid in the investment decision process is believed to add to the quality of the end product. This being the case, most, if not all, of the development companies make office development decisions using some kind of a procedure in the pre-development stage. However low occupancy rates and long payback periods that are being faced, even by the most recently completed Class A office projects in Turkey, show that there are serious deficiencies in these applied procedures and that they lack the necessary and important components of project feasibility analysis, which are basically the market and financial feasibility analysis, that needs to be applied in the pre-development stage of the office development process. That is why this study’s purpose is to explore and identify the deficiencies of the decision-making models currently used by Turkish real estate development companies in the pre-development stage of office development projects and to recommend necessary additions and/or deletions for the enhancement of these company models. To do so, this research involved interviews of ten office developers to identify their go/no-go decision processes in evaluating office developments in Istanbul, Turkey. The study has found that developers tend to fall under three different groups, each following different models: Group I includes exclusively construction companies, Group II includes mixed companies and Group III includes exclusively real estate investment companies. Furthermore, the research has found that similarities and differences among these three groups involve the following: While investment companies seek opportunities based on market research, decisions by construction companies are driven by the availability of land swaps. All three groups emphasize land availability and related title and land-use issues. Although unit-sale continues, there is a gradual shift to income property with the aid of improvement in the financial market, which is also reflected in the decision-making models being used.
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Dougherty, Jennifer L. "Impact of Child-Centered Play Therapy on Children of Different Developmental Stages." Thesis, University of North Texas, 2006. https://digital.library.unt.edu/ark:/67531/metadc5287/.

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The purpose of this study was to determine the impact of child-centered play therapy on children of Piaget's preoperational and concrete operations developmental stages. Piaget's assertions about the contributions of play to cognitive, affective, and social development have provided a basis for the theoretical rationale for the use of play as a therapeutic intervention. The impact of child-centered play therapy was measured by a decrease in parent-child relationship stress as measured by scores on the Child Domain, Parent Domain, and Total Stress Score of the Parenting Stress Index. This study utilized a three wave repeated measures ANOVA design to analyze the impact of child-centered play therapy on children between the ages of 3-8 who received 19-23 individual child-centered play therapy sessions. A pretest, approximate midpoint, and posttest administration was collected for use in the analysis. The population study comprised 24 children referred to the Child and Family Resource Clinic on the University of North Texas campus. Participating children were divided into two treatment groups based on their age at the time of treatment. The preoperational development treatment group consisted of 12 children aged of 3-6 years and the concrete operations development treatment group consisted of children aged 7-8 years. Nine hypotheses were tested using three wave repeated measures ANOVA and eta squared. The results of this study tentatively support the impact of child-centered play therapy with children of both the preoperational and concrete operations developmental stages. The data indicates a statistically significant difference in the impact of child-centered play therapy for children of different developmental stages.
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Books on the topic "Stamen development"

1

Evans, Rodger Courtney. Floral development of 10- and 20-stamen morphotypes of Crataegus section Douglasii. Ottawa: National Library of Canada, 1994.

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1931-, D'Arcy William G., Keating Richard C, and International Botanical Congress (1993 : Yokohama-shi, Japan), eds. The anther: Form, function, and phylogeny. Cambridge: Cambridge University Press, 1996.

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Goll, Edgar. Nachhaltigkeitspolitik in EU-Staaten. Baden-Baden: Nomos, 2004.

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1973-, Lundström Mats, Nyström Louise, and Stadsmiljörådet (Sweden), eds. Industrilandskapet: Kulturmiljö och resurs för stadens framtid. Karlskrona: Stadsmiljörådet, 2001.

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New York (State). Office of the State Deputy Comptroller for the City of New York. Staten Island, economic development and the state of the borough economy. New York, NY: Office of the State Comptroller, New York City Public Information Office, 2005.

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Despotovic, Katarina. Den urbana fronten: En dokumentation av makten över staden. Stockholm: Arkitektur Förlag AB, 2016.

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Wais, Ismail. Dschibuti: Entwicklungsprobleme und Perspektiven kleiner Staaten : ein Fallbeispiel. Osnabrück: VC-Verlagscooperative GmbH, 1991.

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T, Roberts Richard, Catlin Robert E, Spruck Eugene, New York University. Urban Research Center, New York (State). Charter Commission for Staten Island, and Port Authority of New York and New Jersey., eds. The Staten Island economy : prospects for development in the 1990's and beyond: A report to the New York State Charter Commission for Staten Island. [New York, NY]: Urban Research Center, New York University, 1992.

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Cowan, Tadlock. Rural development. New York: Novinka Books, 2007.

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Exploring developmental theories: Toward a structural/behavioral model of development. Hillsdale, N.J: L. Erlbaum Associates, 1987.

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Book chapters on the topic "Stamen development"

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Lardon, A., S. Georgiev, N. Barbacar, F. Monéger, C. Delichère, and I. Negrutiu. "Sexual dimorphism and stamen development in the dioecious white campion." In Anther and Pollen, 21–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-59985-9_3.

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Glimelius, K., M. Hernould, and P. Bergman. "Mitochondrial Regulation of Petal and Stamen Development in Cytoplasmic Male Sterile Cultivars of Nicotiana Tabacum." In Current Issues in Plant Molecular and Cellular Biology, 219–24. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0307-7_29.

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Jaeger, Axel-Volkmar, and Götz-Sebastian Hök. "Development Stages." In FIDIC - A Guide for Practitioners, 83–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02100-8_5.

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Castella, Krystina. "Development Stages." In Designing for Kids, 127–59. New York : Routledge, 2018.: Routledge, 2018. http://dx.doi.org/10.4324/9781315266015-3.

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Longhofer, Jeffrey. "Developmental stages." In A-Z of Psychodynamic Practice, 60–63. London: Macmillan Education UK, 2015. http://dx.doi.org/10.1007/978-1-137-03387-1_21.

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Evans, David C. "Developmental Stages." In Bottlenecks, 129–36. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2580-6_12.

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Mant, T. G. K. "Drug Development Stages." In Clinical Trials in Neurology, 53–58. London: Springer London, 2001. http://dx.doi.org/10.1007/978-1-4471-3787-0_5.

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Campbell, Benjamin. "Stages of Development." In Encyclopedia of Evolutionary Psychological Science, 1–7. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-16999-6_762-1.

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Sanguras, Laila Y. "Stages of Development." In Raising Children With Grit, 57–67. New York: Routledge, 2021. http://dx.doi.org/10.4324/9781003237488-5.

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Young, Gerald. "Development, Stages, and." In Causality and Neo-Stages in Development, 21–42. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-82540-9_2.

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Conference papers on the topic "Stamen development"

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Leino, K. Rustan M. "Staged program development." In the 3rd annual conference. New York, New York, USA: ACM Press, 2012. http://dx.doi.org/10.1145/2384716.2384719.

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DROMANTIENĖ, Rūta, Irena PRANCKIETIENĖ, and Gvidas ŠIDLAUSKAS. "EFFECT OF FOLIAR APPLICATION OF AMINO ACIDS ON THE PHOTOSYNTHETIC INDICATORS AND YIELD OF WINTER WHEAT." In Rural Development 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/rd.2015.028.

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Experiments involving a winter wheat (Triticum aestivum L.) variety ‘Širvinta 1’ were conducted at the Experimental Station of the Aleksandras Stulginskis University during the period 2006–2009 in limnoglacional silty loam on morainne clay loam Cal(ca)ri-Endohypogleyic Luvisol. Winter crops were grown on the background of N150P90K90 mineral fertilization and were additionally foliar-fertilized with amide nitrogen fertilizer, containing different concentrations of amino acids (0.5 %–3.0 %), at a winter wheat booting, heading and milk maturity stages. Experimental evidence showed that solutions with different amino acids concentrations applied for winter wheat fertilization at booting, heading and milk maturity stages increased plant photosynthetic indicators. Chlorophyll a to b ratio in winter wheat leaves significantly increased having applied 0.5–2.5 % amino acids solutions at booting and at milk maturity stages. Plants fertilized with amino acids solutions at booting stage had a possibility to form larger assimilating leaf area. Winter wheat grain yield significantly increased (0.27–0.4 t ha-1) under the effect of amino acids. The highest yield increases were obtained having applied amino acids at booting and heading growth stages. The statistical data analysis (xextr.) evidenced that the highest yield and its quality would be attained with foliar feeding of winter wheat with amino acids fertilizers: at booting stage with 2.4 %, at heading stage with 1.47 %, and milk maturity stage with 1.39 % amino acids solution.
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Sadeh, Willy Z., and Marvin E. Criswell. "Lunar Base Development Stages." In Fifth International Conference on Space. Reston, VA: American Society of Civil Engineers, 1996. http://dx.doi.org/10.1061/40177(207)123.

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SANNIKOVA, Aija, Aina DOBELE, and Madara DOBELE. "EFFECTS OF LIFELONG EDUCATION AND RELATED FACTORS ON THE COMPETITIVENESS OF COUNTRIES." In Rural Development 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/rd.2015.105.

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Modern knowledge becomes a strategic endowment of the country and its key resource for economic growth, giving individuals opportunities to become active employers or increasing their opportunities to become professionals being demanded in the labour market. For these reasons, the development of lifelong education is a significant tool for economic growth in Latvia. Correlation and linear regression analyses showed that lifelong education made the strongest and most positive effects on a country’s competitiveness at two stages of economic development: at the innovation-driven stage and during a country’s transition to it from the efficiency-driven stage (the case of Latvia). Calculations were preformed based on the data for 2008 and 2013, and the results were similar, which indicated the stability of this global causal relationship. So the authors conclude that a country’s stage of economic development plays a crucial role in the extent the factor of lifelong education can affect the country’s global competitiveness. In the countries being at lower stages of economic development, even well-developed lifelong education is not objectively capable of increasing their competiveness as effectively as it takes place, for example, at the innovation-driven stage. Proving a causal relationship – the capability of lifelong education to increase a country’s competitiveness is determined by the existing economic background and rules of game, which are different at different stages of economic development – based on research of the economic aspects of lifelong education may be regarded as the key gain of the present research.
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Dolgushina, VA. "Stages and innovation activities." In Trends in the development of science and education. LJournal, 2015. http://dx.doi.org/10.18411/lj2015-10-6-8.

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DROMANTIENĖ, Rūta, Irena PRANCKIETIENĖ, Gvidas ŠIDLAUSKAS, and Vita SMALSTIENĖ. "THE EFFECT OF MG AND S ON PHOTOSYNTHESIS PRODUCTS AND NITROGEN CONTENT IN WINTER WHEAT." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.005.

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In 2013 and 2014, field experiments involving winter wheat were conducted at Aleksandras Stulginskis University’s Experimental Station on a medium-textured Cal(ca)ri-Epihypogleyic Luvisol. N150P90K120 were applied as the main fertilizers. Additionally, a foliar fertilizer including amide nitrogen, sulphur and magnesium (MgO concentrations ranging from 0.25 % to 2.5 %), (further referred to as magnesium fertilizer), was sprayed at the tillering and booting stages of winter wheat. It was found that magnesium fertilizer foliar-applied at the end of tillering and booting stages tended to increase chlorophyll a and b contents in winter wheat leaves. Chlorophyll a content in leaves significantly increased when the solution with 2.5 % concentration of magnesium had been applied at tillering and when 0.5, 1.0 and 2.5 % concentrations of the solution had been applied at booting stages. Chlorophyll b content in winter wheat leaves was significantly affected by the solutions with 0.5, 1.0 and 2.5 % magnesium concentrations at tillering and by the solutions with 0.5, 1.0, 1.5, 2.0 and 2.5 % magnesium concentrations at booting stages. The highest increase in dry matter content was recorded when 2.5 % MgO solution had been applied at booting stage. A statistically significant correlation was established between the MgO concentrations applied at tillering (r = 0.905*) and booting (r = 0.863*) stages and nitrogen content in winter wheat dry matter.
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Vladlenov, Denis. "MODERN STAGES OF SCIENTIFIC RESEARCH DEVELOPMENT." In MODERN STAGES OF SCIENTIFIC RESEARCH DEVELOPMENT. International Science Group, 2022. http://dx.doi.org/10.46299/isg.p.2022.2.14.

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DUDEK, Magda, Marcin ZIELIŃSKI, Paulina RUSANOWSKA, Marcin DĘBOWSKI, Cezary, PURWIN,, Maja FIJAŁKOWSKA, and Anna NOWICKA. "EFFICIENCY OF ANAEROBIC DECOMPOSITION OF MANURE FROM CATTLE FED WITH SIDA HERMAPHRODITA SILAGE." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.202.

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The study aimed to determine the influence of addition of Sida hermaphrodita silage into cattle forage on efficiency of methane fermentation of cattle manure. Efficiency of methane fermentation connected with amount and composition of produced biogas was determined with respirometric tests. Methane fermentation was performed in mesophilic conditions with initial organic compounds loading of 5 g VS/(dm3∙d). The study was divided into two stages. In first stage, substrate in methane fermentation was only cattle manure. In second stage, substrate in methane fermentation was cattle manure and Sida silage. There were three series of experiments in each stage, due to cattle manure was obtained from cattle fed with forage differ in contribution of Sida silage (0 – series 1, 17% - series 2, 34% - series 3). In the stage 1, biogas production of 223±15 L/kg VS, 247±8.5 L/kg VS and 231±18 L/kg VS was noted in the series 1, 2, and 3, respectively. The addition of Sida silage to the cattle forage had no impact on biogas potential of cattle manure. In the stage 2, the same tendency was observed. No differences in biogas composition between series were also observed. Methane content in biogas was about 60%.
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LELIŪNIENĖ, Jolanta, Ligita BALEŽENTIENĖ, and Evaldas KLIMAS. "FESTULOLIUM METABOLITES ACCUMULATION RESPONSE TO PHOTOPERIOD OF FLOWERING TERMOINDUCTION." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.003.

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Most of plant development, physiological and metabolic processes are regulated by not only soluble sugars such as glucose and sucrose, but also by other signal molecules, such as phytohormones. The investigation of flowering induction, considering the influence of vernalisation duration and photoperiod on morphogenesis stages and accumulation metabolites in the new Festulolium cultivars ’Vėtra’ and ’Punia’ was carried out at the phytotron complex of the Plant Physiology Laboratory, Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry in 2011-2012. The data revealed impact of vernalisation and photoperiod on accumulation of both types of assessed metabolies, i.e. phytohormones and saccharides, and thus confirmed their substantial role. 90 short-day vernalisation induced the highest total phytohormone content in ‘Vėtra’, when plant achieved tillering stage and was going for intensive growth when growth regulators will be important in the metabolic regulation. The highest phytohormone content was recorded after long – day 130+20 day vernalization at VII and IV organogenesis stages of ‘Vėtra’ and ʽPuniaʼ respectively. Saccharides content significantly depended on photoperiod and temperature during vernalisation and was different in ’Vėtra’ and ’Punia’.
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Maurer, Christoph, and James Widmann. "Conceptual Design Theory in Education Versus Practice in Industry: A Comparison Between Germany and the United States." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70079.

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The early stages of product development are arguably the most important in the design of successful products. This paper describes different approaches to the conceptual design phase of product development, how they are taught to undergraduate engineering students, and how they are practiced in industry both in Germany and in the United States. The authors note that teaching the early stages of product development to future engineers at German Universities is more focused on methodology and processes. In the United States teaching design is more about being creative and overcoming individual constraints in order to find good and unconventional concepts. To understand how the conceptual phase is implemented in industry, the authors interviewed 16 companies in Germany and the United States. A thematic analysis was performed on the responses. In German industry, the authors observe uncertainty about how to apply process management in the very early stage of product development where different concepts are developed and evaluated. In U.S. industry most companies do not claim to follow a process during the early stage of concept development. Observing the differences between what is taught to engineering students in school and what is practiced in industry some conclusions recommendations are drawn. The observations demonstrate a weakness in process reliability during the early stage of product development both, in German and U.S. industry that should motivate academia to adapt its pedagogy in order to enable future engineers to create successful concepts.
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Reports on the topic "Stamen development"

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Grumet, Rebecca, Rafael Perl-Treves, and Jack Staub. Ethylene Mediated Regulation of Cucumis Reproduction - from Sex Expression to Fruit Set. United States Department of Agriculture, February 2010. http://dx.doi.org/10.32747/2010.7696533.bard.

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Reproductive development is a critical determinant of agricultural yield. For species with unisexual flowers, floral secualdifferentation adds additional complexity, that can influenec productivity. The hormone ethylene has long, been known to play a primary role in sex determination in the Cucumis species cucumber (C. sativus) and melon (C. melo). Our objectives were to: (1) Determine critical sites of ethylene production and perception for sex determination; (2) Identify additional ethylene related genes associated with sex expression; and (3) Examine the role of environment ami prior fruit set on sex expression, pistillate flower maturation, and fruit set. We made progress in each of these areas. (1) Transgenic melon produced with the Arabidopsis dominant negative ethylene perception mutant gene, etrl-1, under the control of floral primordia targeted promoters [AP3 (petal and stamen) and CRC (carpel and nectary)], showed that ethylene perception by the stamen primordia, rather than carpel primordia, is critical for carpel development at the time of sex determination. Transgenic melons also were produced with the ethylene production enzyme gene. ACS, encoding l-aminocyclopropane-lcarboylate synthase, fused to the AP3 or CRC promoters. Consistent with the etr1-1 results, CRC::ACS did not increase femaleness; however, AP3::ACS reduced or eliminated male flower production. The effects of AP3:ACS were stronger than those of 35S::ACS plants, demonstratin g the importance of targeted expression, while avoiding disadvantages of constitutive ethylene production. (2) Linkage analysis coupled with SNP discovery was per formed on ethylene and floral development genes in cucumber populations segregating for the three major sex genes. A break-through towards cloning the cucumber M gene occurred when the melon andromonoecious gene (a), an ACS gene, was cloned in 2008. Both cucumber M and melon a suppress stamen development in pistillate flowers. We hypothesized that cucumber M could be orthologous to melon a, and found that mutations in CsACS2 co-segregated perfectly with the M gene. We also sought to identify miRNA molecules associated with sex determination. miRNA159, whose target in Arabidopsis is GAMYB[a transcription factor gene mediating response to10 gibberellin (GA)], was more highly expressed in young female buds than male. Since GA promotes maleness in cucumber, a micro RNA that counteracts GAMYB could promote femaleness. miRNA157, which in other plants targets transcription factors involved in flower development , was expressed in young male buds and mature flower anthers. (3) Gene expression profiling showed that ethylene-, senescence-, stress- and ubiquitin-related genes were up-regulated in senescing and inhibited fruits, while those undergoing successful fruit set up-regulated photosynthesis, respiration and metabolic genes. Melon plants can change sex expression in response to environmental conditions, leading to changes in yield potential. Unique melon lines with varying sex expression were developed and evaluated in the field in Hancock, Wisconsin . Environmental changes during the growing season influenced sex expression in highly inbred melon lines. Collectively these results are of significance for understanding regulation of sex expression. The fact that both cucumber sex loci identified so far (F and M) encode isoforms of the same ethylene synthesis enzyme, underscores the importance of ethylene as the main sex determining hormone in cucumber. The targeting studies give insight into developmental switch points and suggest a means to develop lines with earlier carpel-bearing flower production and fruit set. These results are of significance for understanding regulation of sex expression to facilitate shorter growing seasons and earlier time to market. Field results provide information for development of management strategies for commercial production of melon cultivars with different sex expression characteristics during fruit production.
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Newmann, Bobbi, Stephen Prociw, Robert Hull, Gregory Collins, and Jonathan Supovitz. State Leadership Development Policies An Analysis of 50 States and Territories. Consortium for Policy Research in Education, February 2017. http://dx.doi.org/10.12698/cpre.2017.rr17-1.

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Oteri, Frank A., Ruth E. Baranowski, Edward I. Baring-Gould, and Suzanne I. Tegen. 2017 State of Wind Development in the United States by Region. Office of Scientific and Technical Information (OSTI), April 2018. http://dx.doi.org/10.2172/1433800.

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Baranowski, Ruth, Frank Oteri, Ian Baring-Gould, and Suzanne Tegen. 2016 State of Wind Development in the United States by Region. Office of Scientific and Technical Information (OSTI), April 2017. http://dx.doi.org/10.2172/1353000.

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Isaacs, T. Staged Repository Development Programmes. Office of Scientific and Technical Information (OSTI), October 2003. http://dx.doi.org/10.2172/15005412.

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Brown, Elizabeth, and Sarah Busche. State of the States 2008. Renewable Energy Development and the Role of Policy. Office of Scientific and Technical Information (OSTI), October 2008. http://dx.doi.org/10.2172/1219298.

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Doris, Elizabeth, Joyce McLaren, Victoria Healey, and Stephen Hockett. State of the States 2009. Renewable Energy Development and the Role of Policy. Office of Scientific and Technical Information (OSTI), October 2009. http://dx.doi.org/10.2172/1219299.

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Doris, E., J. McLaren, V. Healey, and S. Hockett. State of the States 2009: Renewable Energy Development and the Role of Policy. Office of Scientific and Technical Information (OSTI), October 2009. http://dx.doi.org/10.2172/965526.

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Brown, E., and S. Busche. State of the States 2008: Renewable Energy Development and the Role of Policy. Office of Scientific and Technical Information (OSTI), October 2008. http://dx.doi.org/10.2172/939278.

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Elliott, D., and M. Schwartz. Development and Validation of High-Resolution State Wind Resource Maps for the United States. Office of Scientific and Technical Information (OSTI), July 2005. http://dx.doi.org/10.2172/15016564.

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