meiospore


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meiospore

(ˈmaɪəʊˌspɔː)
n
(Botany) a haploid spore resulting from meiosis
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Ocean acidification and seaweed reproduction: increased C[O.sub.2] ameliorates the negative effect of lowered pH on meiospore germination in the giant kelp Macrocystis pyrifera (Laminariales, Phaeophyceae).
Allocation of blade surface area to meiospore production in annual and perennial representatives of the genus Laminaria.
Sporogenesis in bryophytes indicates that transfer of the sporopollenin wall from zygote to meiospore was accomplished by both precocious quadrilobing of the cytoplasm into the four future spore domains and a delay in timing of the deposition of the complex spore wall (sporoderm).
[The word "spore" is used throughout this section because is generically includes pollen as well as all other meiospores.] The location of sporangia is important because vertical wind speeds typically increase with distance from ground level and because comparatively high wind speeds are required to reduce the boundary layers around spores residing on or within sporangia.
At next stage, haploid cells (meiospores) were segmented after the decomposition of the special wall, and each of the meiospores is turned into young meiospores with big and central vacuoles and small and peripheral nucleus.