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.
Results
Showing 1 to 11 of 11 for “"seed morphology"”.
-
Seed morphology and colour variation in derotinous Cape Proteaceae
I investigated seed colour polymorphism in Leucadendron is investigated for the possibility of crypsis in a post fire environment. Results were inconclusive, possibly due to a missed opportunity, but do not exclude the possibility of crypsis. Seed predation by birds may be an as yet undescribed and …
-
Seed morphology, dormancy and germination of South-West Australian Ericaceae
… contains species with difficult to germinate seeds, including many species with deep intractable dormancy. A better understanding of seed biology and species specific dormancy, and germination mechanisms is required to overcome these difficulties. Land clearing, salinity and disease has …
-
Application of CRISPR/Cas9 to edit genes affecting seed morphology traits in wheat
The CRISPR/Cas9-based genome editing system holds a great promise to accelerate wheat improvement by helping us to understand the molecular basis of agronomic traits and providing means to modify genes controlling these traits. CRISPR/Cas9 is based on a synthetic guide-RNA (gRNA) that can guide …
-
Marshelder (<i>Iva annua</i> L.) Seed Morphology and Patterns of Domestication in Eastern North America
Domestication of the extinct eastern North American crop, marshelder (<i>Iva annua</i> L. var. <i>macrocarpa</I> Jackson) is investigated through quantitative analysis of samples from archaeological sites. Change in marshelder achene (fruit) size over time sheds light on patterns of regional and …
-
An investigation into seed germination requirements of some of the nut-fruited restionaceae
… with mostly ant-dispersed (myrmecochorous) seeds that are endemic to the fynbos region of South Africa. Prior to this study, germination trials largely based on an ecological approach had not elucidated methods of improving seed germination in these species. Investigations of seed morphology …
-
Systematic studies in the tribe Amaryllideae (Amaryllidaceae)
… lineage diversification. Data from bulb and leaf morphology, floral anatomy, pollen, external seed morphology and chromosome cytology were analysed cladistically. The strict consensus tree for Amarytlideae provided a template to trace character evolution. The strict consensus trees for …
-
Archaeological seeds and local varieties of edible fruits: morphology through time
… the phenotypic characterization achieved by seed features compared with molecular analysis on modern Cucumis melo genotypes. A set of 124 accessions of Cucumis melo has been selected for molecular and morpho-colourimetric analyses plus an additional selection of accessions of C. sativus, …
-
Germination niche of Sardinian endemic species in mountain riparian deciduous forests
… one of the major environmental factor governing seed germination in moist soil and, also is responsible for changes in dormancy states of seeds. Seed dormancy prevents germination in a specified period of time, under any combination of environmental factors that otherwise favour germination and …
-
Understanding seed-soil adhesion by myxospermous seeds and their biophysical function in agroecosystems
Seedbanks provide many ecosystem services that support wildlife and regulate soil function. The fate of arable seeds is vital in shaping the aboveground composition of plant communities in agroecosystems. Understanding seed fate informs seedbank dynamics with multi-species interactions, as well as …
-
Verbena L., Glandularia Gmel., Junellia Moldenke, Lantana L. und Lippia L. (Verbenaceae) in Peru
… The genus Lantana produces a one- or two-seeded drupe, while Lippia develops two nutlets. The generic separation of the Verbena-Glandularia-Junellia group is problematic and has been the focus of much discussion in the literature. The three genera are retained mostly as they stand, based …
-
Biology and conservation status of Juniperus macrocarpa Sm. in Sardinia
… were: (1) to analyse morphological variation in seeds of Mediterranean Juniperus taxa (at inter- and intraspecific level) and morphometric differences in J. macrocarpa seeds collected in different populations, seasons and sources; (2) to evaluate the effect of the collecting season, source, …