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A modified leaf that develops sporangia.



a leaf of fern or seed plants that develops one or more sporangia. The sporangia form in the axil of the leaf or on the leafs surface. In aquatic ferns microsporangia and megasporangia form in sporocarps on the same sporophyll. The sporophylls of heterosporous plants on which only microsporangia develop are called microsporophylls, and those on which only megasporangia develop are called megasporophylls. Microsporo phylls and megasporophylls are often more or less identical, for example, in heterosporous club mosses. In seed plants, however, they differ from one another and may be easily distinguished from assimilating leaves, or trophophylls.

References in periodicals archive ?
Effects of molecular weight and hydrolysis conditions on anticancer activity of fucoidans from sporophyll of Undaria pinnatifida.
Nakano, "Antitumor activity and immune response of Mekabu fucoidan extracted from Sporophyll of Undaria pinnatifida," In Vivo, vol.
Kim et al., "Structure and antitumour activity of fucoidan isolated from sporophyll of Korean brown seaweed Undaria pinnatifida," Carbohydrate Polymers, vol.
The term "sporophyll" obviously cannot be applied to this seed-scale complex.
Certain of the sporophylls had also become sterilized.
We recorded the number of Pterygophora sporophyll blades and sporophyll blades with sori, as well as the wet weight of the soral tissue and the wet weight of all sporophyll tissue.
It consists of a single rigid stipe with an apical vegetative blade and numerous lateral sporophylls that are deciduous.
However, the mechanism of Mekabu (Sporophyll of Undaria pinnatifida) fucoidan antitumor activity and how it enhances the immune response remains unknown.
sporophylls, gradually increasing in size toward the apex or toward the
sporophyll apex displaying a patch of light brown tomentum.
usually compact, with hexagonal sporophyll ends arranged in straight
where s = the number of sporophylls containing sori on the individual, l = the mean length of sori on the individual, and w = the mean width of sori on the individual.