sporopolleninn.
/spɒrəˈpɒlənɪn/ Biochemistry.
An inert substance, consisting largely of polysaccharides, that forms the resistant outer coating of spores and pollen grains.
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the world > plants > part of plant > reproductive part(s) > spore or sporule > [noun] > type of > microspore or microsporange > substance forming outer coating
sporonin1928
sporopollenin1931
1931 Chem. Abstr. 25 2455 The crude sporopollenin, i.e. mixt. of spore and pollen membranes, obtained was purified as previously described.
1966 Jrnl. Chem. Soc. : C 16/2 A major problem in the study of sporopollenins is their degradation by sufficiently mild methods to give relatively large molecular species.
1978 Hoyle & Wickramasinghe Life Cloud x. 91 The first possibility..was that it might be a rather exotic material, sporopollenin. This substance forms a major component of the protective coatings in pollens and spores and is chemically and thermally extremely stable.
This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018).
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n.1931