Feedback Submission from Plant Ontology Live Site

[Peter Stevens]

>Pericycle should indeed be part of the stele.  The pith is also part 
>of the stele as defined here, and anyway would have to include 
>sclerenchyma...


P.



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>refer_to_url: http://www.plantontology.org/index.html
>
>comments: I teach a plant anatomy course at the University of Rhode 
>Island and I have struggled with presenting antomical terms 
>heirarachically for many years. I believe PO will be an excellent 
>resource and I plan on having my students use it extensively.
>
>Over the last few week I have been working to make the terminology I 
>use in class consistent with PO and have encountered a few 
>difficulties.
>
>1.  The term "pericycle" (PO:0006203) is defined as "part of the 
>tissue of the stele", yet it is listed as a child of the stem 
>cortex. But, the cortex EXCLUDES the stele, being defined as 
>occuring BETWEEN the vascular system (i.e. the stele) and epidermis.
>
>2.  The "cortex" (PO:0005708) includes the tissues "endodermis" and 
>"hypodermis", but not "parenchyma", "collenchyma", "sclerenchyma", 
>which are listed as separate tissue. This is related to the next 
>point.
>
>3.  In most texts, the cortex (and also the pith) are not considered 
>"TISSUES", but are described as "regions". Although the terms 
>"cortex" and "pith" are useful and widely used, they do not fit well 
>into a classification. Perhaps these terms should become obsolete as 
>has "ground tissue". If "cortical parenchyma" and "pith parenchyma" 
>are added as types of parenchyma, then all tissues of pith and 
>cortex (both stem and root) will be accounted for.
>
>Thank you for your efforts,
>Alison Roberts
>
>name: Alison Roberts
>
>email: aroberts at uri.edu
>
>organization: University of Rhode Island
>
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