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bract is_a phyllome ? #217

Closed planteome-user closed 9 years ago

planteome-user commented 13 years ago

PJ and I were looking at these terms and think bract should be a phyllome, not a leaf.
We had revised the def'n (see http://sourceforge.net/tracker/index.php?func=detail&aid=3028550&group\_id=76834&atid=835555) def'n: A leaf, usually different in form from the foliage leaves, subtending a flower or inflorescence SF Comment: This fits vascular bracts, so maybe should be a child of vascular leaf, but sometimes the term bract is used in bryophytes.

Proposed new def'n: A phyllome, usually different in form from the foliage leaves, subtending a flower or inflorescence note: this should be modified to include bryophytes and gymnosperms

Reported by: cooperl09

Original Ticket: obo/plant-ontology-po-term-requests/217

planteome-user commented 13 years ago

Why change it to phyllome? A bract is a kind of leaf, particularly if one uses the PO definition of leaf: "A phyllome that is not part of a flower."

The current definition of bract ("A leaf, usually different from foliage leaves, subtending a reproductive structure") already encompasses bracts on both vascular and nonvascular plants.

The current definition works, and we already had a group discussions of it (http://wiki.plantontology.org:8080/index.php/POC\_Conf.\_Call\_7-14-10).

Original comment by: rlwalls2008

planteome-user commented 13 years ago

You may not want to put floral and inflores bract together with annotations coming from actual leaf (foliage). It is okay to have them as is_a phyllome, means they are similar but not exactly same and foliage leaf.

Original comment by: jaiswalp

planteome-user commented 13 years ago

I see your point. There are also cataphylls in gymonsperms which are bracts that surround non-reproductive structure.

Also, we are also going to have issues with our definitions of leaf and sporophyll as we move outside angiosperms. If a leaf is defined as a phyllome that is not part of a flower, then what is a sporophyll in non-flowering plants?

Probably the definitions of bract and leaf should go on the agenda, because there are other problems with leaf/vascular leaf.

Original comment by: rlwalls2008

planteome-user commented 13 years ago

They can still stay under phyllome, all we need is to modify the phyllome def: to say

A leaf or leaf like modified lateral plant organ produced by a apical meristem of vegetative shoot and reproductive shoot.

comment: does not include branches.

Original comment by: jaiswalp

planteome-user commented 13 years ago

what is a sporophyll in non-flowering plants?

A modified leaf bearing reproductive structures. analogous to pistil and stamens.

Original comment by: jaiswalp

planteome-user commented 13 years ago

At the POC meeting on 12-1-10, we agreed to make bract a child of phyllome rather than leaf.

def: A phyllome, usually different in form from the foliage leaves, subtending a reproductive structure.

We also modified the definition of leaf slightly, so it would not include bracts: A phyllome that is not associated with a reproductive structure.

I am closing this item.

Original comment by: rlwalls2008

planteome-user commented 13 years ago

Original comment by: rlwalls2008