pericycle

[Katica Ilic]

Pankaj,

Pericycle should be a child of the root stele (as Peter said), as this is
the outermost layer (boundary) of root stele. It's not a part of the
cortex. The innermost layer of the root cortex is endodermis, a layer od
cells next to the pericycle.

Katica

On Tue, 31 Aug 2004, Pankaj Jaiswal wrote:

> Hi,
> Here is what I proposed in response to Alison's mail for pericycle
>
> ---PO:0009075 : plant ontology
> ----i PO:0009011 : plant structure
> -------i PO:0009003 : sporophyte
> -----------p PO:0009005 : root
> --------------p PO:0000258 : root cortex
> --------------p PO:0020124 : root stele
> -------------------p PO:0006203 : pericycle
> -------i PO:0009007 : tissue
> -----------i PO:0005708 : cortex
> --------------i PO:0000258 : root cortex
> --------------i PO:0006203 : pericycle
>
> But this is again leading us into a black hole, which we are trying to
> avoid. The term pericycle is a generic term and we need to create its
> instances such as
> -root pericycle
> -stem pericycle
> -leaf pericycle
>
> In order to make correct lineage the instantiation is required.
>
> Current definition and comments sauugest it so..
>
> # Definition:
>
>      * Part of the tissue of the stele located between the phloem and
> endodermis.
>
> # Comment:
>
>      * In seed plants it is regularly present in roots and absent in
> most stems and leaves.
>
>
>
> -Pankaj
>
>

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