What is microsporogenesis in angiosperms reproduction in. Microsporogenesis is the process of formation of microspores, mmc undergo meiosis to produce microspore tetrad. Male reproductive part is known as stamen and female reproductive part is known as carpel. Flower is the reproductive structure of angiosperms. Micro sporogenesis is found inside microsporangium.
The life cycle of flowering plants is characterized by an alternation between a dominant sporophytic generation and a highly reduced gametophytic generation. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. The pollen grains have two walls outer exine the exine is further differentiated into two regions, outer sexine and inner nexine and inner intine. Reproduction in flowering plants microsporogenesis youtube. Difference between microsporogenesis and megasporogenesis. All the four microspores of a spore terad are functional. Angiosperms produce two types of spores gametes named microspores and megaspores.
The size of the pollen grains generally varies from 1080. The predominance of simultaneous microsporogenesis in extant basal angiosperms and in land plants in general including gymnosperms indicates that simultaneous microsporogenesis is plesiomorphic. Fully mature microgametophyte contains only 3 nuclei. The arrangement of microspores in a tetrad is generally tetrahedral. Microsporogenesis and formation of the male gametophyte. Fully mature microgametophyte contains only 3 nuclei double fertilization. The generative cell soon divides mitotically to form two male gametes fig. Watch previous videos of chapter reproduction in plants. Histochemical studies on male gametophyte of adansonia.
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