Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.


n. Botany
A spore that gives rise to a male gametophyte and is smaller than a megaspore.

mi′cro·spo′ric, mi′cro·spo′rous (mī′krə-spôr′əs, mī-krŏs′pər-əs) adj.


1. (Botany) the smaller of two types of spore produced by some spore-bearing plants, which develops into the male gametophyte. Compare megaspore1
2. (Botany) the pollen grain of seed plants
ˌmicroˈsporic, ˌmicroˈsporous adj


(ˈmaɪ krəˌspɔr, -ˌspoʊr)

the smaller of the two kinds of spores characteristically produced by seed plants and some fern allies, developing into a male gametophyte. Compare megaspore (def. 1).
mi`cro•spor′ic (-ˈspɔr ɪk, -ˈspɒr-) mi`cro•spor′ous (-krəˈspɔr əs, -ˈspoʊr-, -ˈkrɒs pər əs) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.microspore - smaller of the two types of spore produced in heterosporous plantsmicrospore - smaller of the two types of spore produced in heterosporous plants; develops in the pollen sac into a male gametophyte
spore - a small usually single-celled asexual reproductive body produced by many nonflowering plants and fungi and some bacteria and protozoans and that are capable of developing into a new individual without sexual fusion; "a sexual spore is formed after the fusion of gametes"
References in periodicals archive ?
The surface area of the microspore on SGC (273 m 2 /g) was two-thirds than that of BET surface area of SGC (422 m 2 /g).
The young anther wall (see Figure 2E), when microspore mother cells are present, consists of a uniseriate epidermis, an endothecium formed by thin cell walls, one middle layer of cells similar to endothecium cells, and one layer of secretory tapetai cells.
24] found out single species of fungi Pestalotiopsis microspore successfully degrade polyethylene.
Production of alpha amylase by mangrove associated fungi Pestalotiopsis microspore strain VB5 and Aspergillus oryzae strain VB6.
Short-term high temperature growth conditions during vegetative-to-reproductive phase transition irreversibly compromise cell wall invertase mediated sucrose catalysis and microspore meiosis in grain sorghum (Sorghum bicolor).
Effect of activated charcoal on Brassica oleracea microspore culture embryogenesis.
Borderies G, Bechec M, Rossignol M, Lafitte C, Deunff E, Beckert M, Dumas C, Matthys-Rochon E (2004) Characterization of proteins secreted during maize microspore culture: arabinogalactan proteins (AGPs) stimulate embryo development.
The cells in the sporogenous areas that undergo meiosis are called microspore mother cells, or microsporocytes.
Microspore-containing plant segment from donor plants are harvested and incubated under pre-treatment conditions to maintain microspore at a uninucleate cell cycle G1 phase.