A STUDY ON ULTRASTRUCTURAL ASPECTS OF SEED DORMANCY IN WILD OATS
نویسندگان
چکیده مقاله:
The structural differences between dormant and nondormant seeds of wild oats (Avena ludoviciana Durieu) were studied by light and transmission electron microscopy. Radial elongation of scutellum epithelial cells were observed in nondormant seeds after imbibition, compared with dormant seeds in which cells were completely compressed. Ultrastructural differences for example, dilution of cytoplasm, digestion of lipid and aleurone grains, enlarged endoplasmic reticulum, increase and assembly of polysomes and mitochondria, presence of a big vacuole were observed in nondormant seeds. Electron microscopy did not reveal such changes in dormant seeds. Nevertheless a lot of spherosomes, aleurone grains and some small vacuole were observed in the cytoplasm.
منابع مشابه
A study on genetic aspects of seed dormancy
Changes in seed dormancy were selected during the domestication of crop plants from wild-plant species, because some features of dormancy that provide ecological advantages presented agronomic disadvantages within a farmed system. Seed dormancy varies widely among seed batches, even for seeds of the same genotype, indicating large environmental influences. For genetic studies, it is essential t...
متن کاملA study on genetic aspects of seed dormancy
Changes in seed dormancy were selected during the domestication of crop plants from wild-plant species, because some features of dormancy that provide ecological advantages presented agronomic disadvantages within a farmed system. Seed dormancy varies widely among seed batches, even for seeds of the same genotype, indicating large environmental influences. For genetic studies, it is essential t...
متن کاملa study on genetic aspects of seed dormancy
changes in seed dormancy were selected during the domestication of crop plants from wild-plant species, because some features of dormancy that provide ecological advantages presented agronomic disadvantages within a farmed system. seed dormancy varies widely among seed batches, even for seeds of the same genotype, indicating large environmental influences. for genetic studies, it is essential t...
متن کاملMolecular aspects of seed dormancy.
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متن کاملA STUDY ON SEED GERMINATION OF AVENA LUDOVICIANA AND THE EFFECTIVE FACTORS IN SEED DORMANCY BREAKING
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عنوان ژورنال
دوره 4 شماره 1
صفحات 1- 10
تاریخ انتشار 2003-08-23
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