What Is Heterospory. The microspore germinates to form the male gametophyte and the megaspore germinates to form the female gametophyte. The smaller one is known as microspore and the larger one is known as megaspore.
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Web heterospory is the formation of two morphologically different spores (megaspores and microspores) from the sporophytes of pteridophytes and other seed plants. Web heterospory is a phenomenon in which two kinds of spores are borne by the same plant. Web heterospory induces a drastic reduction in the sizes of their gametophytes. These spores differ in size. It is defined as the production of two spores that are different in size in the same plant. The smaller of these, the microspore , is male and the larger megaspore is female. The microspore germinates to form the male gametophyte and the megaspore germinates to form the female gametophyte. Web heterospory is a phenomenon in which two kinds of spores are borne by the same plant. There is an extreme reduction in the male gametophyte and, in most cases, it is nothing but an antheridium. The two phases, or generations, are often morphologically,.
Microspores and megaspores in a single plant. Web heterospory is the production of spores of two different sizes and sexes by the sporophytes of land plants. The megaspores are the bigger spores that produce a female gametophyte and the microspores are the smaller ones that produce a male gametophyte. Heterospory evolved during the devonian period from isospory independently in several plant groups: The heterosporous condition has been observed in many families of flowering plants, including the grasses and sedges and some conifers. The smaller of these, the microspore , is male and the larger megaspore is female. Web heterospory is a phenomenon in which two kinds of spores are borne by the same plant. These spores differ in size. It is defined as the production of two spores that are different in size in the same plant. The smaller one is known as microspore and the larger one is known as megaspore. The two phases, or generations, are often morphologically,.
