Indusium
Indusium
Indusium (In-du-si-um) is a term used in botany, specifically in the study of ferns. It refers to a thin layer of tissue that covers the sorus, a cluster of sporangia which are structures that produce and contain spores.
Etymology
The term 'Indusium' is derived from the Latin word 'indusium', which means 'a tunic or covering'. It was first used in botanical context in the 18th century.
Description
The indusium can vary in shape and size, depending on the species of fern. It may be cup-shaped, flat, or hood-like. The primary function of the indusium is to protect the developing sporangia from harsh environmental conditions and predators. Once the sporangia are mature and ready to release their spores, the indusium shrivels and pulls away, allowing the spores to disperse.
Related Terms
- Sorus: A cluster of sporangia in ferns and fungi.
- Sporangia: An enclosure in which spores are formed.
- Spores: A unit of sexual or asexual reproduction that may be adapted for dispersal and for survival, often for extended periods of time, in unfavorable conditions.
See Also
External links
- Medical encyclopedia article on Indusium
- Wikipedia's article - Indusium
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