archesporial cell Need feedback

[Pankaj Jaiswal]

refer to
http://www.plantontology.org/amigo/go.cgi?action=query&view=query&session_id=7037b1149707476&query=archesporial+cell&search_constraint=terms


Hi

Can you suggest the best usage of the name 'archesporial cell' and its
definition. I am doing the ontology updates now and will be able to add
them this week.

It appear that the term 'archesporial cell' is used as a precursor for
both the microsporocyte and megasporocyte. Whereas in PO the term
'archesporial cell' appears as a synonym for 'megasporocyte'. THE USE OF
THIS SYNONYM IS INAPPRORIATE.

On the other hand the same term (from synonym as above) is used in
describing a developmental stage of the anther development. This is
inconsistent with its usage as synonym in anatomy section.

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WE NEED TWO TERMS FOR 'archesporial cell' representing its location in
either the ANTHER and OVULE. These will be children of 'cell'

SUGGEST new term names??

Delete the synonym from 'megasporocyte'.

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For further reading
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=retrieve&db=pubmed&list_uids=10465788&dopt=Abstract

In arabidopsis anther of wild-type flowers, hypodermal cells at the four
corners of the anther expand radially and differentiate into
archesporial cells at stage 2 of anther development in stage 7 flowers
(Fig. 1C; Sanders et al. 1999). Archesporial cells undergo periclinal
divisions, giving rise to an inner primary sporogenous cell (PSC) layer
and an outer primary parietal cell (PPC) layer at stage 3 anthers (Fig.
1D).

In Arabidopsis stage 10-11 flowers, an archesporial cell forms from a
single hypodermal cell at the top of the ovule primordium, becoming more
prominent than neighboring cells because of its slightly larger size,
denser cytoplasm, and more conspicuous nucleus (Fig. 2A). In some
flowering plants, the archesporial cell of the ovule undergoes a
periclinal division, and subsequently the inner cell differentiates into
the megasporocyte. However, in the majority of flowering plants
including Arabidopsis, the archesporial cell elongates and polarizes
longitudinally, and directly differentiates into the megasporocyte or
megaspore mother cell (MMC) with obvious change in cell shape from near
rectangular to teardrop (Figs. 2B and 7B, below; Willemse 1981;
Grossniklaus and Schneitz 1998)