#507 archegonium initial cell

plant anatomy
open
7
2014-07-18
2012-10-15
No

New term.

This arose out of the definition of central cell (see https://sourceforge.net/tracker/index.php?func=detail&aid=3080937&group_id=76834&atid=835555\).

archegonial initial cell (PO:0025510): An initial cell that is part of an archegonium megagametophyte (PO:0025282) and divides to give rise to an archegonium (PO:0025126).

PMID:17041880

Added archegonium central cell develops from archegonium initial cell. Didn't add archegonium develops from archegonium initial cell, because I think that is only true in gymnosperms.

Discussion

  • Laurel Cooper

    Laurel Cooper - 2012-12-08

    Updated the def'n and comment:

    archegonium initial cell (PO:0025510): An initial cell (PO:0004011) that is part of the archegonium megagametophyte (PO:0025282), and which divides asymmetrically to form an archegonium central cell (PO:0025509) and a smaller archegonium neck canal cell (PO:0030035).

    added relations:
    * archegonium initial cell (PO:0025510) part_of archegonium megagametophyte (PO:0025282)
    * archegonium central cell (PO:0025509) develops_from archegonium initial cell (PO:0025510)
    * archegonium neck canal cell (PO:0030035) develops_from archegonium initial cell (PO:0025510)

    Reference rudall paper: PMID_17041880 Rudall 2006

     
  • Laurel Cooper

    Laurel Cooper - 2012-12-08
    • labels: 843836 --> Request: Existing term-related
    • priority: 5 --> 7
    • assigned_to: rwalls --> cooperl09
     
  • Laurel Cooper

    Laurel Cooper - 2012-12-12

    These were reviewed at the POC call 12-11-12.

    One Question:

    Does the archegonium always exist as part of the archegonium megagametophyte, and does the archegonium megagametophyte always have as part an archegomnium?

    What about in bryophytes and pteridophytes?

     
  • Ramona Walls

    Ramona Walls - 2012-12-13

    Not all archegonia are part of an archegonium megagametophyte (which is a gametophyte, and therefor is a whole plant that only produces egg cells). Many (most?) pteridophytes produce both archegonia and antheridia.

    Archegonium megagametophyte always has an archegonium as part [PO def.: A megagametophyte (PO:0025279) that has as parts one or more archegonia (PO:0025126)]. That relation is already in the PO.

     
  • Laurel Cooper

    Laurel Cooper - 2012-12-20

    archegonium initial cell (PO:0025510)
    Propose revised def'n:
    An initial cell (PO:0004011) that divides asymmetrically to form an archegonium central cell (PO:0025509) and a smaller archegonium neck canal cell (PO:0030035).

    We should not include the phrase" is part of the archegonium megagametophyte (PO:0025282)" since archegonia are not always part of a archegonium megagametophyte.

     
  • Dennis Stevenson

    There is no archegonium central cell except for usage sometimes for gymnosperms. That cell is the ventral canal cell, which is what we should use with central cell as an synonym.

    Also, " archegonium megagametophyte" is not quite right. It should be 'megagametophyte archegonium."

     
  • Laurel Cooper

    Laurel Cooper - 2012-12-21

    re: According to Rudall (2006), in some gymnosperms such as Ephedra, the archegonium central cell (PO:0025509) divides asymmetrically to form a smaller ventral canal cell (PO:0025524) and a larger archegonium egg cell (PO:0025122). So they cannot be synonymns.

    Added comment that it occurs in gymnosperms, not in all plants.

     

Log in to post a comment.

Get latest updates about Open Source Projects, Conferences and News.

Sign up for the SourceForge newsletter:

JavaScript is required for this form.





No, thanks