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Re: Three layers in Hostas?


>I think that what Vaughn meant when he said central layer ( or 
>central tissue) is the one between LI and LIII in the meristem. I 
>don't know what the "core" means unless it means L III tissue of
>the plant. But this is Joe's term. Let's ask him.  Who knows???..I 
>have been wrong before. What do you say Joe? Did I interprete this 

I don't see where Vaughn gives a clear answer to the question of 
whether or not hostas have two or three layers.  The "core" is the 
inner most tissue.  In a two lwyered plant it would be the L2 layer 
and in a three layered plant it would be the L3.  It may not be 
absolutely corect to refer to the "core" as a layer because it doesn't 
have any organized structure like the L1 and L2 in a three layered 
plant.  It is more of a cone, a 3-D structure while the L1 and L2 in a 
three layered plant are more of a plane (flat), being only one cell 
thick at the apex.  The L2 of a two latered plant and the L3 of a 
three layered plant is not a single cell layer, but rather a mass of 
cell where there is no apical, dominant cell(s) as in the L1 or L2 
layers of a two layered plant.

Ben could easily provide us with an answer by doing a microscopic 
examination of a hosta apex.

Joe Halinar

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