Fw: Wheat anatomy (fwd)

[Kellogg, Elizabeth A.]

I'm not convinced of the identity between the pulvinus as the term is applied in eudicots and term applied in wheat.  I looked at a couple of the references that Pankaj sent,and don't quite see what the structure is that they are referring to as pulvinus - it looks like a part of the internode to me, but maybe it's because I can't easily see the details of the photos.  
   The apex of the ovary in all Triticeae is covered with macrohairs, and these persist in the fruit.  I guess this is what is called the brush.  I don't think I've ever heard the term "bristle" applied to those hairs.
Toby

	-----Original Message----- 
	From: owner-po-dev at brie4.cshl.org on behalf of Pankaj Jaiswal 
	Sent: Wed 12/8/2004 2:11 PM 
	To: po-dev at plantontology.org; Victoria 
	Cc: 
	Subject: Re: Fw: Wheat anatomy (fwd)
	
	



	Katica Ilic wrote:
	
	> Hi Victoria,
	>
	> I looked through your list shortly after I received it, just didn't
	> have time to reply. As I mentioned in my earlier e-mail, most of the terms
	> (39 terms exactly) are already in the PO. Remaining three terms are not in the PO,
	> and one sould be introduced, term pulvinus, to which I provided definition
	> from K Esau.
	>
	> New term: pulvinus
	>
	> Definition: An enlargement of the petiole of a leaf, or petiolule of a
	> leaflet, at its base. A structure that has a role in the movements of a
	> leaf
	> or leaflet. (def from K Esau).
	>
	> I need to see where exactly this term would go into Plant Structure
	> Ontology.
	>
	
	By your definition, it is the swollen part of the petiole. Whereas in
	cereal crops, the leaf does not have a petiole. All they have is a leaf
	sheath and leaf lamina.  However sheath can be regarded as a structural
	homolog of petiole. I guess the wheat people are calling is a different
	structure found at the base of the leaf sheath and the structure seems
	to play a role in gravitropism.. I looked at fig-1 of the following
	reference
	http://archiv.fgk.org/01/BLT/dispersion/
	
	Kaufman et al http://www.jstor.org/view/00029122/di001875/00p0367d/0 are
	calling it "Leaf sheath pulvinus".
	
	Looks like it can have the following lineage in ontology
	
	leaf
	..[p] petiole
	......[p] pulvinus (PO:new term)
	..........[i] leaf sheath pulvinus (PO:new term)
	..[p] leaf sheath
	......[i] leaf sheath pulvinus (PO:new term)
	
	
	More refs:
	http://jxb.oupjournals.org/cgi/content/full/52/358/1029
	http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11537463&dopt=Abstract
	http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8490136&dopt=Abstract
	
	
	
	> The last two are terms 'crease' and term 'beard'. I need to find out if
	> they can be synonyms of the existing terms.
	>
	
	If I am not wrong, the "beard" is a synonym for "awn".
	
	"crease is a particular type of morphological character found in grains
	of Triticeae. I suggest creating a new term.
	
	Suggested lineage in PO
	        Seed
	        ..[p]..crease
	definition: the indentation on the ventral side of the seed as found in
	the members of Triticeae
	
	
	I found one more term "brush" under "seed"
	It is often called as bristle, but in order to avoid having confusion
	between bristle leaf and bristles found on seed, my suggestion is to
	call it "seed bristle"
	
	seed bristle: fine hairs on the distal end of the seed as found in the
	members of Triticeae
	
	        Seed
	        ..[p]..seed bristle (synonym: brush)
	
	
	

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