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gynoecium and pistil #470

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planteome-user opened this Issue May 4, 2012 · 5 comments

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planteome-user commented May 4, 2012

Per our discussion at the POC meeting on 5-1-2012, I changed "pistil" from a related synonym of gynoecium (PO:0009062) and added "pistil primordium" as exact synonym of gynoecium primordium (PO:0000019).

I also added the following comment to gynoecium and carpel (PO:0009030): In some cases, a gynoecium may consist of only one carpel, in which case annotations should go on carpel (PO:0009030). The word pistil is used synonymously with gynoecium, but if a gynoecium consists of a single carpel, then pistil may be used synonymously with carpel.

Added "pistil" as a related synonym of carpel.

Reported by: rlwalls2008

Original Ticket: obo/plant-ontology-po-term-requests/470

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planteome-user commented May 10, 2012

At the POC meeting on 5-8-12, we decided to modify the definition of gynoecium. It currently says it must have two or more carpels, with a comment that it may have only one. Will change definition to say it has one or more carpels and add comment that says it usually has two or more.

Also, I got some clarification from people at NYBG re. how pistil is used. Pistil is used synonymously with carpel for apocarpous gyneocia, that is, a pistil represents a single carpel that is not fused to any other carpels. Pistil is used synonymously with gynoecium for syncarpous gynoecia. So, if a gynoecium has a single carpel, it has one pistil. If it has multiple fused carpels, it has one pistil. If it has multiple unfused carpels, it has multiple pistils. This suggests that pistil should be a broad synonym for both carpel and gynoecium.

Original comment by: rlwalls2008

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planteome-user commented May 10, 2012

Current def. of gynoecium (PO:0009062): A collective phyllome structure composed of two or more carpels.
Comment: In some cases, a gynoecium may consist of only one carpel, in which case annotations should go on carpel (PO:0009030). The word pistil is used synonymously with gynoecium, but if a gynoecium consists of a single carpel, then pistil may be used synonymously with carpel. In Zea mays, gynoecia of tassel florets and of the lower florets of ear spikelets usually do not develop fully, and they are present in a rudimentary state. If you are annotating to this structure for Zea mays or other grasses, please also add an annotation to the corresponding floret type. Choose the most specific term possible from: spikelet floret (PO:0009082), ear floret (PO:0006354), lower floret of pedicellate spikelet of ear (PO:0006353), lower floret of sessile spikelet of ear (PO:0006351), upper floret of pedicellate spikelet of ear (PO:0006350), upper floret of sessile spikelet of ear (PO:0006352), tassel floret (PO:0006310), lower floret of pedicellate spikelet of tassel (PO:0006313), lower floret of sessile spikelet of tassel (PO:0006315), upper floret of pedicellate spikelet of tassel (PO:0006314), upper floret of sessile spikelet of tassel (PO:0006316).

New proposed definition, gynoecium: A collective phyllome structure (PO:0025023) composed of one or more carpels (PO:0009030).

Comment: A gynoecium is usually composed of two or more carpels, but may have only a single carpel as part. If annotating gene expression to a gynoecium with a single carpel, the annotation should go on carpel. A gynoecium with two or more carpels may be either syncarpous (carpels fused) or apopcarpous (carpels free) or the carpels may be partially fused. The word pistil is used synonymously with gynoecium for a synocarpous gynoecium, and synonymously with carpel for an apocarpous gynoecium, whether it has one or more carpels.
In Zea mays, gynoecia of tassel florets and of the lower florets of ear spikelets usually do not develop fully, and they are present in a rudimentary state. If you are annotating to this structure for Zea mays or other grasses, please also add an annotation to the corresponding floret type. Choose the most specific term possible from: spikelet floret (PO:0009082), ear floret (PO:0006354), lower floret of pedicellate spikelet of ear (PO:0006353), lower floret of sessile spikelet of ear (PO:0006351), upper floret of pedicellate spikelet of ear (PO:0006350), upper floret of sessile spikelet of ear (PO:0006352), tassel floret (PO:0006310), lower floret of pedicellate spikelet of tassel (PO:0006313), lower floret of sessile spikelet of tassel (PO:0006315), upper floret of pedicellate spikelet of tassel (PO:0006314), upper floret of sessile spikelet of tassel (PO:0006316).

Added syncarpous gynoecium and apocarpous gynoecium as synonyms, but maybe there should be new terms for these.

Original comment by: rlwalls2008

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planteome-user commented May 14, 2012

From this definition, it might not be clear that the gynoecium is not just any random collection of carpels, but ALL of the carpels in a flower.

Suggest a slightly revised definition: A collective phyllome structure (PO:0025023) composed all of the carpels (PO:0009030) in a flower (PO:0009046).

Comment: A gynoecium is usually composed of two or more carpels, but may have only a single carpel as part... (same as before)

Original comment by: rlwalls2008

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planteome-user commented May 14, 2012

Ramona: Comment: A gynoecium is usually composed of two or more carpels, but may have only a single carpel as part... (same as before)


Based on the new definition, which I like, there is no need for this comment. The new definition communicates that its all inclusive.

Original comment by: jaiswalp

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planteome-user commented May 23, 2012

Updated definition in file as per comment from 2012-05-14 12:00:00 PDT, but left off the comment that "A gynoecium is usually composed of two or more carpels..." as per PJ's suggestion.

Pistil is broad synonym of gyneocium and carpel.

Original comment by: rlwalls2008

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