Question

Differentiate between coleoptile and coleorrhiza.

Answer 1

	Coleoptile	Coleorrhiza
1.	The epicotyl bearing shoot apex and leaf primordia are enclosed in a foliar structure called coleoptile.	The radical and root cap are enclosed in a sheath called coleorrhiza.
2.	Coleoptile has a terminal pore for the emergence of the first leaf.	Coleorrhiza is a solid structure.
3.	It protects the plumule during emergence from the soil.	It does not protect the radicle during its passage into the soil.
4.	It grows much beyond the grain.	After emergence from grain, it stops growing.
5.	Coleoptile, after emergence from soil during germination, becomes green and does photosynthesis.	Coleorrhiza does not come out of the soil. It remains non-green.