One of the exceedingly minute spores found in certain flowerless plants, as Selaginella and Isoetes, which bear two kinds of spores, one very much smaller than the other. Cf. Macrospore.
The smaller of two kinds of spore borne by a plant, usually giving rise to a male prothallium ; pollen-grain.
In seed plants, it gives rise to the pollen grain, the male gametophyte.
In heterosporous plants, spores that form the male gametophyte (microgametophyte) which produces sperm
smaller of the two types of spore produced in heterosporous plants; develops in the pollen sac into a male gametophyte
The cell from which a pollen grain develops.
a small, haploid (N=1) spore of a heterosporous plant that produces a microgametophyte (male gametophyte)
In heterosporous plants, a haploid spore produced within a microsporangium of a sporophyte. Upon germination, microspores produce unisexual male gametophytes ( microgametophytes). Monocotyledon: A flowering plant in which only one embryonic leaf is present. Monocotyledonous plants comprise a monophyletic lineage derived from within the dicots. | Anthophyta section of Lab 10| Lab 13: Reproduction in Seed Plants| Lab 14: Plants and the Environment
The smaller of the two types of spore produced by ferns and higher plants, giving rise to the male gametophyte. In Tracheophytes the microspore is the pollen grain.
Gk. mikros, small + spora, a sowing] In plants, a haploid spore that develops into a male gametophyte; in seed plants, it becomes a pollen grain.
A general term for the smaller spores of heterosporous plants, that is, the spores from which the microgametophyte develops.
the smaller of the two kinds of spores produced in the sexual life cycle of a heterosporous plant, giving rise to the male gametophyte.
One of the spore in heterosporous plants that give rise to male gametophytes and are generally smaller than the megaspore.
A spore that gives rise to a male gametophyte.
In plants which are heterosporous, the smaller kind of spore is called a microspore; it usually germinates into a male (sperm-producing) gametophyte. Contrast with megaspore.
