HOME

TheInfoList



OR:

The coleorhiza, coleorrhiza or root sheath is a protective layer of tissue that surrounds the
radicle In botany, the radicle is the first part of a seedling (a growing plant embryo) to emerge from the seed during the process of germination. The radicle is the embryonic root of the plant, and grows downward in the soil (the shoot emerges from t ...
(the embryonic primary root) in
monocotyledon Monocotyledons (), commonly referred to as monocots, ( Lilianae '' sensu'' Chase & Reveal) are grass and grass-like flowering plants (angiosperms), the seeds of which typically contain only one embryonic leaf, or cotyledon. They constitute on ...
seeds A seed is an embryonic plant enclosed in a protective outer covering, along with a food reserve. The formation of the seed is a part of the process of reproduction in seed plants, the spermatophytes, including the gymnosperm and angiospe ...
. 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 root Important structures in plant development are buds, shoots, roots, leaves, and flowers; plants produce these tissues and structures throughout their life from meristems located at the tips of organs, or between mature tissues. Thus, a living plant ...
s have a coleorhiza. Zea mays coleorhiza (02).jpg, Coleorhiza with sweet corn Zea mays coleorhiza coleoptyl (02).jpg, Collar of the coleorhiza and coleoptyl 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 Coleoptile is the pointed protective sheath covering the emerging shoot in monocotyledons such as grasses in which few leaf primordia and shoot apex of monocot embryo remain enclosed. The coleoptile protects the first leaf as well as the growing ...
. Scale=1.4mm. Radicle or Embryonic Root in Zea Mays Embryo (47636870242).jpg, Root of corn with rootcap and coleorhiza


References

{{Reflist


External link


Difference
between
coleoptile Coleoptile is the pointed protective sheath covering the emerging shoot in monocotyledons such as grasses in which few leaf primordia and shoot apex of monocot embryo remain enclosed. The coleoptile protects the first leaf as well as the growing ...
and coleorhiza Plant anatomy