Difference between polygonum, allium and adoxa
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P. Maheswari (1950) divides development of embryosac or female gametophyte in three major groups
Monosporic — In this type of development 3 megaspores of tetrad get degenerate one remain functional and forms embryosac.
Bisporic — when two megasporic nuclei takes part in formation of embryosac. Both the nuclei are genetically different.
Tetrasporic — In this type due to failure of cytokinesis I and II a four nucleate coenomegaspore tetrad is formed and all 4 nuclei participate in formation of embryosac.
Angiosperms exhibits great diversity in the development of embryosac which is as follows
Monosporic — In this type of development 3 megaspores of tetrad get degenerate one remain functional and forms embryosac.
Bisporic — when two megasporic nuclei takes part in formation of embryosac. Both the nuclei are genetically different.
Tetrasporic — In this type due to failure of cytokinesis I and II a four nucleate coenomegaspore tetrad is formed and all 4 nuclei participate in formation of embryosac.
Angiosperms exhibits great diversity in the development of embryosac which is as follows
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