sporopollenin


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sporopollenin

[¦spȯr·ō′päl·ə·nən]
(biochemistry)
A substance related to suberin and cutin but more resistant to decay that is found in the exine of pollen grains.
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References in periodicals archive ?
Among the lipid metabolism-related gene sets, five (IDG017, IDG019, IDG030, IDG036, and IDG041) encode members of 86A, 86B, and 94A subfamilies of cytochrome P450 proteins that are related to fatty acid [omega]-hydroxylation in primary fatty alcohols and suberin monomer biosynthesis for formation of anther cuticle and pollen sporopollenin in monocots and dicots [43-45, 47, 83-86].
Identification of ionene and other carotenoid degradation products from the pyrolysis of sporopollenins derived from some pollen exines, a spore coal and the green river shale.
It has been reported that [11] orbicules originate in the cytoplasm of the tapetal cells as lipoidal pro-orbicular bodies that accumulate below the membrane and eventually extrude to the cell surface (facing the locule) where they provide sporopollenin precursors for exine formation.
Yilmaz, "Surface modification of sporopollenin with calixarene derivative, " Water, Air and Soil Pollution, vol.223, pp.2623-2632, 2012.
These 5H monomers were either directly or indirectly detrimental to pollen wall-forming sporopollenin biosynthesis, which is thought to protect pollens from UV radiation and desiccation.
Immobilization of Candida rugosa lipase on sporopollenin from Lycopodium clavatum.
resting cysts, unlike many other dinoflagellate cysts, possess an outer layer of calcite beneath which is a thin sporopollenin wall.
intine: Inner wall of a pollen grain that does not contain sporopollenin.
The protective pigment, called sporopollenin, and several of its long-lived breakdown products absorb a specific wave-length of ultraviolet radiation, says Lomax.