POC Conf. Call 2-28-12

POC meeting, Webex Conference Call; Date: Tuesday Feb 28th, 2012 10am (PST)

In attendance:

POC members:

Absent:

Collaborators: none

Any changes or corrections (additions/deletions, etc) needed in the minutes from the POC_Conf._Call_2-21-12?

Back to POC Meetings Minutes

vascular cells and related cell types

Continued from last week's discussion:

Current parent: axial cell

axial cell

axial cell (PO:0000081): A vascular cell derived from the fusiform cambial initial and oriented with its longest diameter parallel with the main axis of stem or root. [source: ISBN:0471245208] Comment: These cells make up the axial system, also known as vertical or longitudinal system.

The term axial cell, and the current definition, describe a particular type of vascular cells found in wood. This is not appropriate as the parent for xylem and phloem cells. Also, the term axial cell is not widely used. "Axial system" is widely used to describe the vascular tissue in wood (in contrast to the radial system).

Suggest that we obsolete this term, replace with new terms for axial system and radial system (see Items for future meetings#other wood terms)

New proposed hierarchy (children of plant cell):

plant cell

>sieve element (new term)

>>sieve tube member (syn.: sieve tube element)

>>sieve cell (new term)

>tracheary element

>>tracheid

>>vessel member

>ground tissue cell (PO:0025030)

>>sclerenchyma cell (PO:0000077)

>>>sclerid (new term)

>>>fiber cell (new term)

>>>>phloem fiber cell

>>>>xylem fiber cell