POC Conf. Call 10-25-11

POC meeting, Webex Conference Call; Date: Tuesday Oct 25th, 2011 10am (PDT)

In attendance:

POC members:

Absent:

Collaborators: none

Any changes or corrections (additions/deletions, etc) needed in the minutes from the POC Conf. Call 10-18-11?

PGDSO revisions

sub-types of whole plant development stage

vegetative, reproductive, senescent, and dormant stages

Existing terms for vegetative, reproductive, senescent and dormant stages are actually referring only to the sporophyte stage, so they will be made subtypes of sporophyte development stage, and renamed sporophyte vegetative development stage, etc. Corresponding stages will be created as subtypes of gametophyte stage.

We had an extensive discussion of what senescence is, and how to define the landmarks for the beginning and end of the senescent development stage. Some key points:

-Need different definitions for a senescent stage in a whole plant and a senescent stage in a part of a plant (like a leaf).

-Even though a plant may die from other causes before the end of normal senescence, the senescent stage of a whole plant ends with death.

proposed definition, senescent stage: A plant structure development stage that is (1) initiated by an event of cell death within the plant structure, (2) terminated in the death of the plant structure in such a way that (3) the former is connected to the latter by processes of dismantling of cell components and membranes, loss of functional chloroplasts, and an overall decline in metabolism. [source: POC:curators, BS]

This definitions can be modified for specific structures (like sporophyte, gametophyte, leaf, etc.).

proposed definition, gametophyte reproductive development stage: A gametophyte development stage that is initiated with the development of a gamete producing structure and terminated with fertilization.

Comment: Some gametophytes may dies before fertilization.

proposed definition, gametophyte vegetative development stage: A gametophyte development stage that succeeds spore germination and ends with the formation of gametangia.

Worked on new children of gametophyte reproductive development stage and gametophyte vegetative development stage. Whole plant development stages that are named after a plant structure that is not a whole plant will need to have the words "whole plant" in their name, to distinguish them from other structure development stages. For example, gametophore reproductive whole plant development stage is a whole plant development stage, while gametophore development stage is a stage in the development of an individual gametophore.

proposed definition, gametophore reproductive whole plant development stage (needs work): A gametophyte reproductive development stage in which gametophores and gametangia are being produced.

proposed definition, gametophore vegetative whole plant development stage (needs work): A gametophyte vegetative whole plant development stage during which a gametophore is being produced but no gametangia are being produced. Succeeds a protonema stage.

proposed definition, protonema whole plant development stage (PO:0030006): A gametophyte development stage during which a gametophyte undergoes filamentous growth. This succeeds spore germination and precedes a thalloid development stage (planar growth) or gametophore development stage.

Can also add new terms for thalloid reproductive whole plant development stage and thalloid vegetative whole plant development stage.

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