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Add a synonyms to PO:0001015 : K second mitotic division stage
-tricellular pollen development stage
-pollen at tricellular stage
K second mitotic division stage (PO:0001015):
Stage of microgametophyte development during which the generative cell undergoes mitotic division to form two male gametes, the sperm cells.
A pollen development stage (PO:0001007) during which the generative cell (PO:0020097) undergoes mitotic division to form two male gametes, the pollen sperm cells (PO:0025121).
Added two new synonyms, as requested:
- tricellular stage (broad)
- tricellular pollen development stage (exact)
The third synonym (pollen at tricellular stage) describes a plant structure at this stage, so it is not appropriate here.
Revised comment: In taxa with mature two-celled pollen (PO:0025281), the second mitotic division takes place after pollen germination (GO:0009846), in germinating pollen tube cell (PO:0025195).
The whole pollen development stage class requires work, as some of these terms (such as this one) describe processes, rather than stages, but we will add the synonyms for now and do further revisions for the next release.
This term overlaps with: generative cell mitosis (GO:0055047): The process in which the generative cell divides by mitosis to form two haploid cells. These will subsequently differentiate into sperm cells.
Also, generative cell (PO:0020097) is currently under revision in the PO as well: https://sourceforge.net/tracker/index.php?func=detail&aid=3525242&group_id=76834&atid=835555.
I am not so sure about adding "tricellular stage" as a synonym here. embryos would have a tricellular stage as would many other structures.
re: tricellular stage as a broad synonym.
DWS' point is valid, that is why I made it a broad synonym, but perhaps it should tricellular pollen stage.
changed broad synonym 'tricellular stage' to exact synonym 'tricellular pollen stage'
We Discussed at POC call 12-4-12 (http://wiki.plantontology.org/index.php/POC_Conf._Call_12-4-12) and decided to be more specific was better.
Added comment: This term overlaps with: generative cell mitosis (GO:0055047): The process in which the generative cell divides by mitosis to form two haploid cells. These will subsequently differentiate into sperm cells.
I am closing this for now till we have time to work on the pollen development stages further.
Accepted and closing this item