POC Conf. Call 6-29-10

POC meeting, Webex Conference Call; Date: June 29th, 2010 10am (PDT)

In attendance:

POC members:

Absent:

Collaborators:

Acceptance of the minutes from the 6-23-10 meeting? All in favor?

Workshop page: [Corvallis Workshop June 29th and 30th, 2010]

Agenda for June 29th Conference Call:

The main goals of the meeting will be ontology development and preparation for a release, along with focused training on annotating genes and mappings.

*Curators discussion: Determine priorities for next release of PO:

1. Date of next release? July 2010? Aug 15th goal for live release

-What needs to be done before this release? -Beta release to user TAIR, NASC, Virtual Plant , Gramene, SoyBase, GeneVestigator, SGN, OryzaBase -Planttribe, Traitnet, Antenza? Panel of experts? set up review -send to announce list and PO-dev -include annotations -Update of the Plant Physiology paper -documentation of changes in the ontology, research paper

2. Is top level of Plant Structure ontology ready to go? -Review of top level terms

-Review of second level terms

-Should structures have part_of relations (to whole plant, sporophyte or gametophyte) whenever possible?

-Do we want to keep in vitro structures or send to OBI?

3. Status and goals for is_a completeness (Ramona can report)

- 136 terms without is_a parents

Based on definitions:

-73 of these terms have obvious parents (many of them some kind of portion of plant tissue)

-11 more terms could be assigned parents if new terms were created

-15 terms could be assinged parents with some consideration

-36 terms need discussion to determine parent terms (no obvious parent)

4. Should we aim to complete one branch of the ontology? For Example: leaves, in vitro terms or plant cells, specific type- axial cells for example hydroids and leptoids?

5. Changing lower-level terms to include cross products and genus-differentia definitions.

-How much can be done before release

6. Goals and timetable for the next release:

fall 2010?

bud (PO:0000055)

All of the grand-children of bud . See SF tracker item for explanation and suggestions. This issue came up while working on the terms for tuber eye.

At 6-23-10 conference call, we decided to make only 'axillary bud' and 'terminal bud' direct children of bud to eliminate the problem of dual parentage.

Added new terms: terminal reproductive bud (PO:0025071) and axillary reproductive bud (PO:0025072).

This will allow annotations of reproductive buds from non-flowering plants and 'terminal floral bud' and 'axillary floral bud' will be children of these terms Therefore, the terms 'floral bud', 'vegetative bud' and 'inflorescence bud' were obsoleted.

Tuber PO:0004543 (tuber)

On the 6-23 conference call, everyone agreed that tuber is_a stem,not a shoot.

proposed def'n: A swollen or enlarged storage stem with determinate growth.

This would encompass both subterranean and aerial tubers.

• Tuber epidermis (PO:0025046): proposed def'n: A portion of stem epidermis that is part of a tuber.

• Aerial tuber epidermis (PO:0025047): A portion of tuber epidermis that is part of an aerial tuber.

• Subterranean tuber epidermis (PO:0025048): A tuber epidermis that is part of a subterranean tuber.

Comment: The skin of young potatoes is epidermis while the skin of mature potatoes is periderm. Related syn.: potato skin

tuber epidermis

New terms to deal with tuber epidermis:

• Tuber periderm (PO:0025043): A portion of stem periderm that is part of a tuber.

• Aerial tuber periderm (PO:0025044): A portion of tuber periderm that is part of an aerial tuber.

• Subterranean tuber periderm (PO:0025045): A portion of tuber periderm that is part of a subterranean tuber. Comment: The skin of young potatoes is epidermis while the skin of mature potatoes is periderm. Narrow syn.: potato skin

Can we close these items? We will work on the definitions of stem and shoot tomorrow morning.

hypodermis and endodermis

During the POC conference call on 6-23-10, it was decided that endodermis and hypodermis should be part_of cortex, but we needed to change the definition of cortex to allow this. Barry suggested that we define the parent terms as the maximal portion of a tissue, then the child terms can be part_of.

cortex (PO:0005708): A maximal portion of ground tissue between the vascular system and the epidermis in a plant.

hypodermis (PO:0005051): A portion of ground tissue that is the outermost layer of a portion of cortex. comment:A layer or layers of cells beneath the epidermis that is distinct in appearance from adjacent tissues.

endodermis: (PO:0000252)A portion of ground tissue that is the inner most layer of a cortex and has a casparian strip in its anticlinal cell walls. Comment: Forms a sheath around the vascular system. It may have secondary walls later, part_of cortex

Other types of cortex, for instance: embryo cortex, stem cortex, and several others then must also be defined as is_a ground tissue that is part_of cortex.

Terms from last week

1. fruit (See SF Tracker: fruit)

Current def'n: The seed-bearing structure in angiosperms, formed from the ovary after flowering.

Proposed new def'n: A collective plant structure that contains a post-fertilization stage gynoecium and any other structures of the flower that mature with it. (Comment: Exceptions are cases of parthenocarpy, apomixis or other hormone-induced conditions.

Note that we may need to define parthenocarpy at some point (or put in a dbx ref for it). Dbx ref to parthenogenesis: Medical subject heading Ontology D010312

Barry suggested that we reword the second half of the definition, because the final word 'it' was ambiguous about what it was referring to, and the use of the word 'other' was unclear. We agreed that the second part of the definition about other floral structures should go into the comments section. Started to discuss whether or not the seed should be included as part of the definition (fruit contains seed), but ran out of time. To be continued next meeting.

2. Embryo (See SF Tracker: embryo)

Current def'n: A young sporophyte contained within a seed. [source: APWeb:Glossary, GR:pj]

Proposed def'n: A sporophyte in the early stages of growth and differentiation, consisting of precursor tissues for the leaves, stem (see epicotyl/hypocotyl) and root (see radicle).

We could mention the cotyledons in a comment- specific to flowering plants

(2) See Cultured embryo PO:0000010 for definition of in vitro plant embryo

(3) Adventitious embryos do not arise from zygotes -add a comment?

Relationships:

(1) has no is_a parent, is_a sporophyte, which makes it a whole plant through transitivity (2) develops_from zygote (see comment above) Usually (3) embryo contained_in archegonium (works for land plants, not charophytes (doi: 10.1111/j.1469-8137.2009.03054.x)