The Male Gametophyte of Flowering Plants.
نویسنده
چکیده
منابع مشابه
Cold Tolerance of the Male Gametophyte during Germination and Tube Growth Depends on the Flowering Time
In temperate climates, most plants flower during the warmer season of the year to avoid negative effects of low temperatures on reproduction. Nevertheless, few species bloom in midwinter and early spring despite severe and frequent frosts at that time. This raises the question of adaption of sensible progamic processes such as pollen germination and pollen tube growth to low temperatures. The p...
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Plant reproduction involves gamete production by a haploid generation, the gametophyte. For flowering plants, a defining characteristic in the evolution from the 'naked-seed' plants, or gymnosperms, is a reduced female gametophyte, comprising just seven cells of four different types--a microcosm of pattern formation and gamete specification about which only little is known. However, several gen...
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In flowering plants, the male gametophyte, the pollen, develops in the anther. Complex patterns of gene expression in both the gametophytic and sporophytic tissues of the anther regulate this process. The gene expression profiles of the microspore/pollen and the sporophytic tapetum are of particular interest. In this study, a microarray technique combined with laser microdissection (44K LM-micr...
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Male gametogenesis in angiosperms involves two rounds of mitosis that are essential for the generation of two sperm cells to achieve double fertilization, a distinct event in the sexual reproduction of flowering plants. Precise regulation of mitosis during male gametogenesis is critically important for the establishment of the male germline. However, the molecular mechanisms underlying mitotic ...
متن کاملSpecial Section: Embryology of Flowering Plants
The plant life cycle alternates between the diploid sporophyte (spore-producing organism) and the haploid gametophyte (gamete-producing organism). The female gametophyte of flowering plants develops within the ovule, a specialized structure within the ovary, which gives rise to the seed after fertilization. The female gametophyte, or embryo sac, contains a small number of clonally derived cell ...
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عنوان ژورنال:
- The Plant cell
دوره 1 7 شماره
صفحات -
تاریخ انتشار 1989