نتایج جستجو برای: gametophyte
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The pollen tube is fundamental for the reproduction of seed plants. Characteristically, it grows relatively quickly and uni-directionally ("polarized growth") to extend the male gametophyte to reach the female gametophyte. The pollen tube forms a channel through which the sperm cells move so that they can reach their targets in the ovule. To grow quickly and directionally, the pollen tube requi...
The haploid gametophyte stage of the moss life cycle is amenable to genetic and biochemical studies. Many species can be cultured on simple defined media, where growth is rapid, making them ideal material for metabolic studies. Developmental responses to hormones and to environmental inputs can be studied both at the level of individual cells and in multicellular tissues. The protonemal stage o...
INTRODUCTION In sexually reproducing organisms, gametes are generated by a specific lineage derived from somatic cells that undergo a somaticto-reproductive cell fate transition (SRT). In mammals, the primordial germ cells (PGCs) differentiate in the embryo at gastrulation stage (Bendel-Stenzel et al., 1998). By contrast, the spore mother cells (SMCs) of flowering plants are formed in the adult...
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