Noun
coleoptile (plural coleoptiles)
(botany) A pointed sheath that protects the emerging shoot in monocotyledons such as oats and grasses.
Plant hormones 1 An oat coleoptile with the sun overhead. Source: Internet
The plumule is covered with a coleoptile that forms the first leaf while the radicle is covered with a coleorhiza that connects to the primary root and adventitious roots form from the sides. Source: Internet
However, what’s likely to happen is that the coleoptile will split and leaf out underground. Source: Internet
Once the coleoptile tip nears the surface, exposure to red light within solar radiation reduces production of the growth-promoting hormone from the coleoptile tip, Nielsen explains. Source: Internet