Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"POLLEN TUBE GROWTH"”.
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Metabolism of Phytic Acid in Pollen of Lilium Longiflorum Thunb. And Mathematical Modeling of Wall Polysaccharide Formation During Pollen Tube Growth (Phytase, Simulation)
… literature about phytic acid metabolism in pollen is limited. The accumulation of phytic acid during development of lily pollen and its degradation during germination and tube growth were studied. Phytase which is responsible for phytic acid breakdown was isolated from ungerminated and …
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Pollen Tube Growth Characteristics of Selected Crabapple Cultivars and Managing Apple (Malus x domestica) Crop Load and Early Season Diseases with Organic Bloom Thinning Chemicals
… are discussed. The first project analyzed the pollen tube growth of several crabapple cultivars. Previous research had improved the use of bloom thinning chemicals, by coordinating the application timing with the pollen tube growth between pollination and fertilization. However, pollen tube …
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The reproductive biology of Clematis addisonii
… that this species is protogynous. <i>In vivo</i> pollen tube growth supports this conclusion. Field observations suggest that the morphological pistillate phase lasts significantly longer than the staminate phase and is sufficient enough in length that cross-pollination is likely to occur during …
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SELF-INCOMPATIBILITY IN CHEIRANTHUS ALLIONII
… indicated by a stigmatic barrier to incompatible pollen tube growth, seen in scanning electron micrographs, and by differences in reciprocal cross-compatibilities. Strength of the SI system varied, but no completely self-compatible plants were found. Marked segregation for SI level within self- …
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Evaluating Application Timing Strategies, Suitability, and Efficacy of Apple Blossom Thinning Chemicals for Commercial Use
… were utilized in 2019 to compare between pollen tube growth model-guided blossom thinning sprays and those that are based on fixed time intervals between the initial application and subsequent thinning sprays. It was generally found that model-guided blossom thinning sprays and sprays …
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Pollination Ecology, Self-incompatibility and Genetic Diversity in the Herbaceous Eastern North American Spring Ephemeral, Erythronium americanum
… and hand pollinations were performed to examine pollen limitation and self-incompatibility. Novel molecular markers were developed and used to quantify genetic diversity, clonal diversity, and population structure. Hand pollination treatments (natural, hand supplemented and bagged flowers) showed …
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Identification of a mitogen-activated protein kinase, p56, which mediates the self-incompatibility response in Papaver rhoeas L.
… specific recognition system that inhibits the growth of incompatible pollen, whereas compatible pollen from an unrelated plant of the same species is able to grow and effect fertilization. In Papaver rhoeas, inhibition of incompatible pollen is mediated by a signal transduction pathway that …
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Influence of climate changes on cross allergies: possible involvement of pollen transglutaminase
… and hazelnut allergens have been identified in pollens or fruits. Allergic cross-reactivity can occur in a patient reacting to similar allergens from different origins, justifying the research in both systems as in Europe a greater number of people suffers from apple fruit allergy, but little …
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Amplified fragment length polymorphism (AFLP) analysis of genetic variability in Phalaenopsis
… stress treatments during pollination and early pollen tube growth.
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Investigation of multiple interspecific reproductive barriers in Solanum section Lycopersicon
… clade, postmating prezygotic barriers regulating pollen tube growth in pistils are known to be important for preventing hybridization. Interspecific pollen rejection frequently displays the SI x SC rule, in which crosses between self-incompatible (SI) species and self-compatible species (SC) are …
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Reproductive biology and ex situ conservation of the genus Restrepia (Orchidaeae)
… supplement, the highest rates for seedling growth and development. This represented the first protocol for axenic germination of Restrepia in the literature (Millner et al., 2008) and provided a tested methodology for investigating breeding systems and producing Restrepia plant material for …
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Genetic studies of phenotypic variants in the woodland strawberry, (Fragaria vesca)
… abnormalities in seed set and germination, pollen tube growth, adhesion of the abaxial epidermal layer to the mesophyll layer and reduced petiolule length. These phenotypes are consistent with actin binding and microtubule associated protein mutants in other plant species. Insertional …
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Variation in breeding systems and consequences for reproductive traits in Erica
… in selfing ability, this includes differences in pollen-ovule (P/O) ratios. However, indices suggest the resprouting form of E. mammosa to have an increased ability to self-fertilize while the seeder form has an increased ability for autonomous selfing. The 29 species analysed were divided into …
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Dissecting key biomass traits through traditional QTL mapping, exploring novel functional genomics approaches, and investigating self-incompatibility in Miscanthus
… QTLs appeared to peak in the third year of growth. Both the use of spring emergence and vigor rating as a covariate to account for variation related to differences in establishment increased the power to detect QTLs in the two year establishment period. Finally, a dry period in the middle of …
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ΔΙΕΡΕΥΝΗΣΗ ΜΕ ΒΙΟΧΗΜΙΚΕΣ ΜΕΘΟΔΟΥΣ ΤΟΥ ΜΗΧΑΝΙΣΜΟΥ ΤΟΥ ΑΣΥΜΒΙΒΑΣΤΟΥ ΣΤΑ ΟΠΩΡΟΦΟΡΑ ΔΕΝΔΡΑ
… AS A FORM OF CELLULAR RECOGNITION BETWEEN POLLEN AND PISTIL. REGARDING THE MORPHOLOGY OF INCOMPATIBILITY IT WAS CONFIRMED THAT IN THE TWO SPECIES IS OF THE GAMETOPHYTIC TYPE, WHERE THE REACTION OCCURS AS THE GERMINATING POLLEN TUBES PENETRATE THROUGH THE STYLE. CRITICAL TIME FOR THE HOURS …