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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 20 of 58 for “"Inflorescences"”.
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Characterizing the Expression Pattern of miR167-Regulated ZmArf3 and ZmArf30 in Maize Inflorescences
… and other organs. Maize (corn) produces two inflorescences, the tassel and ear, which are patterned by a series of branching events that depend on the initiation of axillary meristems. The maize fuzzy tassel (fzt) mutant contains a mutation in dicer-like1, a key enzyme require for microRNA …
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Development of floral primordia and prediction of flowering in white oak (Quercus alba L.)
… (Quercus alba L.). It was found that staminate inflorescences are initiated in late spring and staminate flowers are structurally mature before the onset of dormancy in October. Pistillate inflorescences are not initiated until late summer, and pistillate flowers complete almost all of their …
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Crypsis in non-flying mammal pollinated Proteaceae: novel adaptations and evidence of nectarivorous bird avoidance
… cameras, P. amplexicaulis and P. humiflora inflorescences were observed over the 2017 flowering period, noting visitation by birds and small mammals and assessing the legitimacy of birds as pollinators. In the literature, bird visitation to exposed inflorescences is suggested to be rare, but …
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Community ecology of small-mammal pollinated proteas
… This study aimed to determine whether the inflorescences of Protea canaliculata, Protea sulphurea and Protea humiflora possess these traits and are pollinated by small mammal species. An additional aim of this study was to determine whether there is a variation in pollinator efficiency of …
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A squeaky suspicion : rodent pollination in Protea nana
… Floral morphology, presence of pendulous inflorescences
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The effects of structured variation in nectar standing crop on currency choice and optimal foraging by bumble bees
… of among-inflorescence nectar variation departed inflorescences in manners that diverged increasingly from expectations of the Marginal Value Theorem (MVT). Bees apparently assess inflorescence quality on a per-patch basis, changing their exploitation behavior in response to poor or rewarding …
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Rodent pollination in Androcymbium latifolium (Colchicaceae)
… packed tightly into geoflorous and cryptic inflorescences, nocturnal anthesis and production of copious amounts of sugar-rich nectar and pollen as well as a musky odour. Androcymbium latifolium (Colchicaceae), a geophyte that occurs in the semiarid Succulent karoo region of South Africa, …
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Genetics of Maize Inflorescence Architecture
Maize inflorescences have become a model system for functional genomics from agronomic, developmental, and evolutionary viewpoints. The purpose of this research was to gain deeper insights into genetic control of quantitative variation for maize inflorescence architecture. Two biparental …
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Transformation of Digitaria sanguinalis with XvPer1, a novel antioxidant
… African grass, was micropropagated from immature inflorescences. Embryogenic calli generated was transformed with XvPerl using the Biolistic gene gun. XvPer 1 shares high similarity to a recently discovered group of antioxidants, the 1-Cys PRX's. A homologue was shown to be absent in D. …
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Study on the dispersion of particles at a fluid-liquid interface and its application in hydrophilous pollination
… observed, by which the pollen released from male inflorescences of Ruppia is adsorbed on a water surface: 1) inflorescences rise above the water surface and after they mature their pollen mass falls onto the surface as clumps and disperses as it comes in contact with the surface; 2) inflorescences …
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Towards a systematic analysis and comparison of perianth evolution in Caryophyllineae in the context of the synflorescence
… region’—the synflorescence—where flowers and inflorescences are nested within. However, the synflorescence has received little attention. Besides, botanical terms describing perianth and synflorescence/inflorescence structure lack consistency and often ‘force’ continuous traits into discrete …
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The autecology of Stipa Trichotoma Nees (Nassella Tussock) on Rhodes Estate, in the South-Western Cape
… flowering were noted as well as the numbers of inflorescences and fruits produced. The stages of flowering were also noted. Floral initiation occurred in early summer with fruits being dispersed in January to February. Variation in fruit shape and colour was found. Cleistogamy was found to be …
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Moth pollination, low seed set, and vestigialization of attractive floral traits in Abronia umbellata (Nyctaginaceae)
… in seed set by day- vs. night-pollinated inflorescences, but in another year of study, night-pollinated inflorescences set significantly more seed than those pollinated during the day. We integrate this work with tests of pollen and resource limitation of seed production and with seed set …
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Modeling of oil palm energy surface fluxes and growth for Brazilian Amazon climate conditions
… palm, such as the ratio between male and female inflorescences and the abortion rate of inflorescences, which affect crop yield. Keywords: Amazon. Agriculture. ECOSMOS.
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Evolutionary responses to global change: an experimental test of the effect of altered precipitation on hybridization rates in sunflower (Helianthus)
… were absent). The relative number of open inflorescences of each species predicted hybridization rates. Thus, this study demonstrates how changing environmental conditions, specifically precipitation, could influence hybridization rates.
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A taxonomic revision of the spiny members of subfamily celastroideae (Celastraceae) in Southern Africa
… presence of spines and brachyblasts, dichasial inflorescences, and mainly unisexual flowers. A new genus, Gloveria, is described. Taxa proposed are: four species (one new combination) in Putterliclda; one species in Gloveria; 31 species and three subspecies in Gymnosporia (nine new sections, …
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Annotation of Vascular Plant Structures using Haptic Assistance
… of flower heads such as Gerbera hybrida, and inflorescences such as Arabidopsis thaliana. User study participants found the haptic assistance helpful for interacting with and annotating plant samples.
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The Function of Insect Trapping by Penstemon Digitalis and Cirsium Discolor
… that capture insects are produced in the inflorescences. I tested four hypotheses as to the function of insect-trapping in these two plant species: (1) Direct defense against herbivores; (2) Indirect defense against herbivores by attraction of predatory arthropods; (3) Direct nutrition of …
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Isolation in Tragopogon (Compositae)
… between the incidence of seed germination when inflorescences were covered prior to anthesis versus when they were left uncovered. (2) Pollen viability counts were made to determine the incidence of viable microspores produced by plants of the three taxa. (3) Cytologic studies of …
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Aspects of the biology of the receptacle weevil, Rhinocyllus conicus (Froehlich) relating to its role as a biocontrol agent of nodding thistle, Carduus nutans L.
… plus larval numbers in and their effect upon inflorescences was observed. Adult seasonal appearance and anatomical changes were noted macroscopically and investigated by microscopic dissection. Adult weevils were shown to disappear from the field in mid-summer and to hibernate from June to …
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