What is heterospory? Briefly comment on its significance. Give two examples.
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❤. HETEROSPORY ❤
⭐. Production of two kinds of spores on the same plant is called "heterospory ".
Ex : selaginella , salvinia
❤. SIGNIFICANCE ❤
⭐. Two types of spores are seen
1. Microspores - germinate into male gametophyte.
2. Megaspores - germinate into female gametophyte.
⭐. Sex organ in male gametophyte is Antheridia. It gives Antheroids as male gamets.
⭐. Sex organ in female gametophyte is Archegonia. It produces egg as female gametophytes.
⭐. Fusion of Antherozoids to egg results zygote.
⭐. Developement of zygote into young embryo takes place within the female gametophytes.
⭐. This event is precursor to the seed habit . This is considered as important step in evaluation.
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Explanation:
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Heterospory is the phenomenon of formation of two types of spores, i.e., smaller microspore and larger megaspore. This phenomenon was firstly reported in Selaginella, a pteridophyte. ... Examples of heterospory are Selaginella, Salvinia and Marsilea, etc
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