Heterospory, i.e., formation of two types of spores --- microspores and megaspores is a characteristic feature in the life cycle of a few members of pteridophytes and all spermatophytes. Do you think heterospory has some evolutionary significance in plant kingdom?
Heterospory, i.e., formation of two types of spores --- microspores and megaspores is a characteristic feature in the life cycle of a few members of pteridophytes and all spermatophytes. Do you think heterospory has some evolutionary significance in plant kingdom?
Heterospory is the production of spores of two different sizes and sexes by the sporophytes of land plants. Two types of spores are produced by heterosporic plants.
Small spores are microspores which germinate into male gametophyte and large spores are macrospores which develop into female gametophyte.
In the evolution of plants, pteridophytes are intermediate between bryophytes and gymnosperms. All bryophytes are homosporous and all gymnosperms are heterosporous.
This condition is advanced as sexual dimorphism result in cross-fertilisation.
Primitive or earlier pteridophytes are homosporous later pteridophytes are heterosporous e.g., Dryopteris, Pteris-homosporous Selaginella, Salvinia-heterosporous.
Heterospory is the production of spores of two different sizes and sexes by the sporophytes of land plants. Two types of spores are produced by heterosporic plants.
Small spores are microspores which germinate into male gametophyte and large spores are macrospores which develop into female gametophyte.
In the evolution of plants, pteridophytes are intermediate between bryophytes and gymnosperms. All bryophytes are homosporous and all gymnosperms are heterosporous.
This condition is advanced as sexual dimorphism result in cross-fertilisation.
Primitive or earlier pteridophytes are homosporous later pteridophytes are heterosporous e.g., Dryopteris, Pteris-homosporous Selaginella, Salvinia-heterosporous.
