Importance of Apomixis in Plant Reproduction
Apomixis is a crucial mechanism in plant reproduction that allows seed production without fertilization, contributing to the preservation of desirable traits in crop plants over generations. Learn about the differences between apospory and apogamy, as well as the significance of these asexual reproduction methods in plants.
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Presentation Transcript
APOMIXIS Apomixis is the mechanism of seed production without fertilization. ... Apomixis is of high importance as; It produces seed progeny which are exactly the same as the mother plant. Thus apomixis helps in the preservation of good characters over generations for crop plants.
*The main difference between apospory and apogamy is that apospory is the development of a gametophyte directly from the sporophyte without undergoing either meiosis or spore formation whereas apogamy is the development of an embryo without fertilization. * Furthermore, apospory occurs in Anthoceros while apogamy occurs in Funaria. *Apospory and apogamy are two terms that describe methods of asexual reproduction which alter the usual sexual reproduction of plants.
*Similarities Between Apospory and Apogamy: Apospory and apogamy are two methods of asexual reproduction altering the usual sexual reproduction in plants. *In both methods, the sporophyte produces different types of reproductive units without undergoing meiosis. *Therefore, there is no production of gametes. Also, these two methods mainly occur in bryophytes and less commonly ferns and lycopods.
*Apospory is the production of a gametophyte by the sporophyte without undergoing meiosis or formation of spores. *As there is no meiosis in apospory, the gametophyte is diploid. In contrast, apogamy is the formation of an embryo without undergoing fertilization. *Therefore, the forming sporophyte from the embryo is always haploid. *Both apospory and apogamy are two types of asexual reproduction methods which alter the regular sexual reproduction. *However, the main difference between apospory and apogamy is the type of reproductive structure produced in each process and their ploidy.
