Coleoptile is the pointed protective sheath covering the emerging shoot in monocotyledons such as grasses. Coleoptiles have two vascular bundles, one on either side. Unlike the flag leaves rolled up within, the pre-emergent coleoptile does not accumulate significant protochlorophyll or carotenoids, and so it is generally very pale. Some preemergen...
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http://en.wikipedia.org/wiki/Coleoptile
(from the article `plant development`) ...the coleoptile and coleorhiza, protective sheaths of the young shoot and the radicle. The scutellum arises from octant cells, which also ...
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http://www.britannica.com/eb/a-z/c/108
<plant biology> Closed hollow cylinder or sheath of leaf like tissue surrounding and protecting the plumule (shoot axis and young leaves) in grass seedlings. ... (18 Nov 1997) ...
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http://www.encyclo.co.uk/local/20973
The sheath covering the first leaf of a grass seedling as it emerges from the soil.
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http://www.encyclo.co.uk/visitor-contributions.php
(in grasses) the first leaf above the ground, forming a sheath around the stem tip.
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https://www.infoplease.com/dictionary/coleoptile
No exact match found.
