coleorhiza

[planteome-user]

coleorhiza (PO:0020034)

Current def.: A portion of plant tissue surrounding the radicle in the embryo or seedling of some monocots. [APWeb:Glossary]

Currently part_of embryo, but it is also part of the seedling. It develops in the embryo, but persists after germination to protect the embryonic root. The coleorhiza, like the coleoptile, has an epidermis (and root hairs), and thus should be classified as a plant organ, even though many authors casually refer to it as a tissue.

Proposed definition: A plant organ that surrounds the radicle in the embryo and seedling.
Comment: Found in Poaceae and some other monocots. Protects the emerging radicle. The parenchyma cells of both the coleorhiza and epiblast may function in storage.

New children:
embryonic coleorhiza (PO:0025288): A coleorhiza that is part of a plant embryo.
part_of embryo

seedling coleorhiza (PO:0025289): A coleorhiza that develops from an embyronic coleorhiza
develops_from embryonic coleorhiza

Reported by: rlwalls2008

Original Ticket: obo/plant-ontology-po-term-requests/340

[planteome-user]

Slightly revised definition: A plant organ that surrounds a radicle.
Comment: Found in Poaceae and some other monocots. Protects the emerging radicle in a plant embryo or seedling. The parenchyma cells of both the coleorhiza and epiblast may function in storage.

Original comment by: rlwalls2008

[planteome-user]

Also some gymnosperms. see the most recent Issue of Bot Rev.

Original comment by: dws409

[planteome-user]

These terms and definitions were accepted at the POC meeting on 5-6-11.

Will add to comment that it can be found in some gymnosperms.

Closing this item.

Original comment by: rlwalls2008

[planteome-user]

• priority: 6 --> 1
• status: open --> closed-fixed

Original comment by: rlwalls2008

[planteome-user]

POC conf call 3-21-12:

Revised def'n: coleorhiza (PO:0020034): A sheath-like plant organ (PO:0009008) that surrounds the radicle (PO:0020031) of a plant embryo (PO:0009009) or the emerging root (PO:0009005) of a seedling (PO:0000003).''

comment: Found in Poaceae and some other monocots as well as some gymnosperms. Protects the emerging radicle (PO:0020031). The parenchyma cells (PO:0000074) of both the coleorhiza and epiblast (PO:0020036) may function in storage.

>>embryo coleorhiza (PO:0025288): A coleorhiza (PO:0020034) that is part of a plant embryo (PO:0009009).
>>seedling coleorhiza (PO:0025289): A coleorhiza (PO:0020034) that is part of a whole plant (PO:0000003) in the seedling development stage (PO:0007131).
comment: Develops from an embryo coleorhiza (PO:0025288).

accepted and closing

Original comment by: cooperl09