New terms in PO

[Felipe Zapata]

Cauline leaf:
 From the definition it looks like it refers to a regular leaf. Only it  
has a particular name because "is before flowering" and "lacks a  
petiole".  Lacking a petiole shouldn't pose a problem as not all the  
parts of leaf have to be present (we still follow the sometimes part of  
rule, right?). So a leaf may or may not have petiole.  In regards to  
"before flowering" I wonder if this event makes a "regular leaf" (in  
terms of anatomy and structure) a different type of leaf. I don't think  
so.  This is more like a...developmental stage term?

Rosette leaf:
Once again, from the definition, it looks like it refers to a regular  
(normal) leaf growing in certain arrangement, not to a different type  
of leaf.  If the internodes between leaves elongate or not, that's a  
different issue.  Some plants grow characteristically as rosette plants  
(e.g. plants in the high peaks), nonetheless the leaves are "normal  
leaves".  If rosette leaf is introduced to POC, why not alternate leaf?  
opposite leaf?

Hypocothyl hook:
I am not what it refers to, but if it is indispensable...

F

On Sep 2, 2004, at 8:47 PM, Katica Ilic wrote:

> Hi all,
>
> We have a user's request to introduce the following terms in PO:
>
> Cauline leaf
> Rosette leaf
> Hypocotyl hook
>
>
> Cauline leaf and rosette leaf are both present in TAIR (with several
> annotations for both)
>
> Term name: Cauline leaf
> ID: TAIR:0000090 (currently 5 genes associated with this term, 5
> annotations)
> Def: Stem leaf, produced before the transition to flowering, lacking a
> petiole.
>
> Term name: Rosette leaf
> ID: TAIR:0000089 (currently 11 genes associated with this term, 11
> annotations)
> Def: Leaf that is part of phyllotactic spiral with little internode
> elongation between successive leaves. In Arabidopsis, vegetative
> development is characterized by the production of the rosette leaves.
>
> Both terms could be children of 'leaf' or 'simple leaf' (instance
> of).
> These are the existing terms in PO (under phyllome node), and to my
> knowledge, synonymy may not work here:
>
>   PO:0009025 : leaf
>   PO:0006340 : adult leaf
>   PO:0020103 : flag leaf
>   PO:0020043 : compound leaf
>   PO:0006338 : embryonic leaf
>   PO:0006339 : juvenile leaf
>   PO:0020042 : simple leaf
>
>
> I myself am not very sure about the third proposed term, hypocotyl
> hook; it's referring to the region of the seedling in early seedling
> development, but this is not dev stage term.
>
> There are few publications (often ethylene response genes) in which the
> authors are referring to 'hypocotyl hook'. Here are some:
>
> http://dev.biologists.org/cgi/reprint/126/16/3661
> http://www.blackwell-synergy.com/links/doi/10.1046/j.1365 
> -313x.1999.00607.x/full/
>
> What do you think about introducing these three terms?
>
> Pankaj, this node is currently assigned to you.
>
> Katica
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