Results 171 to 180 of about 5,168 (221)
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Cytomixis in the cereal (Gramineae) microsporogenesis
Protoplasma, 2015The specific features in behavior of the nuclei and chromatin migrating through cytomictic channels as well as in formation of micronuclei in the cereal microsporogenesis have been studied. Immunofluorescence microscopy has allowed for demonstration that the tubulin cytoskeleton does not play a significant role in the intercellular migration of nuclei.
Yuri V, Sidorchuk +2 more
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Molecular control of microsporogenesis in Arabidopsis
Current Opinion in Plant Biology, 2011Microsporogenesis is essential for male fertility and requires both the formation of somatic and reproductive cells in the anther and meiotic segregation of homologous chromosomes. Molecular genetic studies have uncovered signaling molecules and transcription factors that play crucial roles in determining the anther cell types and in controlling gene ...
Fang, Chang +3 more
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Photoinduced Microsporogenesis in Rice
Botanical Gazette, 1974Fourteen-day-old plants of a photosensitive winter variety of rice, cv. BAM-3, were subjected to photoinductive cycles of 8-hr light and 16-hr darkness for 1, 2, 3, 4, 5 weeks, or until anthesis. Short-day treatment for 1 and 2 weeks caused vacuolation in the cytoplasm of a few of the sporocytes.
G. Misra, P. A. Khan
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Microsporogenesis in the Cucurbitaceae
Botanical Gazette, 19301. Darkly staining granules are present among the bivalent chromosomes in late diakinesis in all members of Cucurbita, but are absent in Citrullus, Luffa, and Cucumis. 2. Cucurbita pepo and C. maxima each has twenty bivalent chromosomes. 3. Citrullus vulgaris has eleven bivalent chromosomes; Luffa cylindrica, eleven; Cucumis melo, twelve.
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Phenological measurements of microsporogenesis in trees
Tree Physiology, 1995The value of two heat sum methods, one linear (degree days > 5 degrees C) and the other curvilinear (period units), were assessed together with calendar days as predictors of the duration of microsporogenesis in seven natural stands of Norway spruce (Picea abies (L.) Karst.) and eleven natural stands of Scots pine (Pinus sylvestris L ...
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Ultrastructure of microsporogenesis and microgametogenesis in Brachypodium distachyon
Protoplasma, 2015Brachypodium distachyon has emerged as a model system for forage grass and cereal grain species. Here, we report B. distachyon pollen development at the ultrastructural level. The process of microsporogenesis and microgametogenesis in B. distachyon follows the typical angiosperm pollen development sequence.
Akanksha, Sharma +2 more
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MICROSPOROGENESIS IN JATROPHA CURCAS L.
Acta Horticulturae, 2012Jatropha curcas L. is an important oil crop for biofuel production. As such, the yield is commercially important and breeding programmes are focused to select and propagate high yielding individuals. Haploid plants are very useful in these programmes to produce true homozygotes in a short period of time.
L.M. Currais +2 more
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Microsporogenesis and megasporogenesis in Sinofranchetia (Lardizabalaceae)
Flora - Morphology, Distribution, Functional Ecology of Plants, 2012Abstract Sinofranchetia Hemsl. (Lardizabalaceae) is a monotypic genus endemic to China. A recent combined analysis of molecular sequence data and morphology suggested that Sinofranchetia should be placed in tribe Sinofranchetieae. Embryology of taxa can be complementary to molecular phylogenetics and of special value at the genus level; however ...
Xiao-hui Zhang, Yi Ren, Xian-hua Tian
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Evolution of Microsporogenesis in Palms (Arecaceae)
International Journal of Plant Sciences, 2007The main features of microsporogenesis, or male meiosis (cytokinesis, intersporal wall formation, and tetrad form), are described in 24 species of palms (Arecaceae). The species examined belong to two of the five subfamilies recognized in the latest classification of the family.
Sannier, Julie +3 more
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MICROSPOROGENESIS IN CITRUS LIMON (RUTACEAE)
American Journal of Botany, 1971Prior to meiosis tapetal cells become binucleate, and callose deposition separates spore mother cells from each other. No cytomictic channels are present during meiosis. Cytokinesis is simultaneous, by furrowing. The primexine and a rudimentary exine are laid down while the microspores are still in tetrads.
Harry T. Horner, Nels R. Lersten
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