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Land plant spores that develop into male gametophytes; structures that are part of the alternation of generations in many seedless vascular cryptogams, all gymnosperms and all angiosperms;haploid, are produced from diploid microsporocytes by meiosis.
The megaspore mother cells develop just after pollination in early May and mature in mid-late June.
Usage of microspore in inglês
1
These clones were shown to correspond to genes expressed in the tapetum from the early uninucleate microspore stage to the dinucleate stage.
2
The MS1 gene is expressed at low levels in anthers from closed buds, with expression in the tapetum at the stage of microspore release.
3
The essence of morphology (in the better and more precise sense) is descent; thus we say that a pollen-grain is morphologically a microspore.
4
During the pretreatment period, the osmotic regulation in the medium was beneficial to microspore embryogenesis regardless of the type and concentration of the tested osmoticum.
5
Using sorbitol and sucrose, plastids differentiated poorly but accumulated large amounts of starch, suggesting that these sugars are metabolized by micropores and microspore derived structures.
6
This process requires a stress treatment, usually performed in the anther or isolated microspores for several days.
7
Abundance of microspores, bacteria.
8
The UV-positive microspores were almost hanging in the air by now- Icouldalmost follow the trail of exhalations he had left.