The
coleorhiza or
root sheath is a protective layer of tissue that surrounds the
radicle (the embryonic primary root) in
monocotyledon .
During germination, the coleorhiza is the first part to grow out of the seed, growing through cell elongation. Soon afterwards, it is pierced through by the emerging primary root and then remains like a collar around the root base. Also the adventitious roots have a coleorhiza.
Zea mays coleorhiza (02).jpg|Coleorhiza with sweet corn
Zea mays coleorhiza coleoptyl (02).jpg|Collar of the coleorhiza and coleoptile with sweetcorn
Triticum aestivum seed (01).jpg|Grain of wheat. co = coleorhiza, r1 and r2 = root
Zea Kernal L.jpg|Corn grain length section, A=Pericarp, B=Aleurone, C=Tip cap, D=Endosperm, E=Coleorhiza, F=Radicle, G=Hypocotyl, H=Plumule, I=Scutellum, J=Coleoptile. Scale=1.4mm.
Radicle or Embryonic Root in Zea Mays Embryo (47636870242).jpg|Root of corn with rootcap and coleorhiza
External links
Definition of coleoptile :
The plumule are enclosed in sheaths which are called coleoptile. They protect the plumule for future, as in future it develops into shoot.
