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microspore
[mahy-kruh-spawr, ‑-spohr]
noun
the smaller of the two kinds of spores characteristically produced by seed plants and some fern allies, developing into a male gametophyte.
a pollen grain.
microspore
/ ˈɪəʊˌɔː /
noun
the smaller of two types of spore produced by some spore-bearing plants, which develops into the male gametophyte Compare megaspore
the pollen grain of seed plants
microspore
One of the two types of haploid spores produced by a heterosporous plant. Microspores develop into male gametophytes and are usually smaller than megaspores. In angiosperms, the microspore develops into the pollen grain.
Other 51Թ Forms
- microsporic adjective
- microsporous adjective
- ˌˈǰ adjective
51Թ History and Origins
Origin of microspore1
Example Sentences
In germination they develop a minute prothallus which bears archegonia to be fertilized by antherozoids developed from the microspores.
Three small cells occur inside the cavity of the microspore; two of them collapse and the third divides into two, forming a stalk-cell and a larger body-cell.
Same divided lengthwise, equally magnified; some microspores seen at the left.
In both forms cysts containing megaspores and megasporozoites, and others containing microspores and microsporozoites are found, considered as representing sexual differentiation thrown back to the very earliest stages of the life-cycle.
It is clear, however, that in all these conidia, macrospores, microspores, and some spermatia, or by whatever names they may be called, there exists a power of germination.
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