…flap of tissue called an indusium. In rust and smut fungi, a sorus is a spore mass produced on the leaf of an infected plant. Reproductive structures called sori also occur in various species of marine algae.

In some species, they are protected during development by a scale or film of tissue called the indusium (pl.: indusia), which forms an umbrella-like cover.

Mar 22, 2025 · One is the so-called false indusium, a rolled-over leaf margin under which sporangia form and mature. The true indusium is a separate and unique formation, the structural origins of which are not clear, that constitutes a more or less papery covering over the sorus.

The meaning of INDUSIUM is an investing outgrowth or membrane; especially : an outgrowth of a fern frond that covers the sori.

Indusium is a delicate membranous structure that protects the sporangium or sorus in pteridophytes Based on the origin, Indusium may be true or false. True indusium: In the figure, solid red circle – True indusium

A sorus may be protected during development by a scale or flap of tissue called an indusium. In rust and smut fungi, a sorus is a spore mass produced on the leaf of an infected plant. Reproductive structures called sori also occur in various species of marine algae. See also spore.

Jul 21, 2021 · Indusium in the largest biology dictionary online. Free learning resources for students covering all major areas of biology.

The indusium griseum and fasciolar gyrus are very small components of the limbic lobe, and are continuations of the hippocampal formation, forming an unremarkable thin continuous ring of grey matter at the edge of the cortex.

Oct 18, 2023 · A true indusium is an outgrowth from the underside of a fern leaf, evolving to cover and protect the sporangia. Conversely, a false indusium isn't a separate structure; instead, it's created when the leaf's margin rolls or folds over to shield the sporangia.

The sorus is sometimes covered and protected by an indusium, a flap-like tissue arising from the leaf blade. In addition to its protective function for the developing sporangia, indusia may function to control the release of spores.