The word "Coleorhiza" is frequently encountered in botanical studies, but its spelling can be tricky. The correct pronunciation of the word is /ˌkɒlioʊˈraɪzə/, with emphasis on the third syllable. The word is derived from two Greek words - "coleo" meaning "sheath" and "rhiza" meaning "root." As such, "Coleorhiza" refers to the protective sheath that covers the embryonic root in a plant's seed. Despite its complicated spelling, pronunciation, and etymology, "Coleorhiza" remains an essential term in the field of botany.
The term "coleorhiza" is a botanical term that refers to a protective sheath found in the germinating seeds or embryos of certain plants, particularly in monocotyledonous plants. It is an essential structure that acts as a shield, enclosing and protecting the delicate radicle, which eventually develops into the primary root of the plant.
The coleorhiza is typically a thin, membranous covering that surrounds the radicle, preventing its exposure to potential damage or desiccation. This protective sheath develops at the base of the embryo, near the attachment point of the seed. It can be observed during the early stages of germination when the seed starts to sprout, and is often translucent or whitish in appearance.
The main function of the coleorhiza is to facilitate the initial anchorage of the seed in the soil and provide protection against mechanical injury as it grows downwards. It also plays a crucial role in absorbing water from the surrounding environment, aiding in the hydration of the developing root.
The coleorhiza is commonly found in plants belonging to the family Poaceae (grasses), although it may also occur in other monocots such as orchids and lilies. Its presence and characteristics can vary across different species and genera, but its basic role of guarding and nurturing the emerging root remains consistent.
The sheath which covers the young rootlets of monocotyledonous plants.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word Coleorhiza is derived from two Ancient Greek words: Koleon meaning sheath or case, and rhiza meaning root.