telomeres

Manuel Simon ma at ABC.univie.ac.at
Thu May 19 11:02:20 EST 1994


In article <9405190315.AA24155 at pclsp2> vinz at PCLSP2.KUICR.KYOTO-U.AC.JP (Vincenzo Nardi-Dei) writes:
>From: vinz at PCLSP2.KUICR.KYOTO-U.AC.JP (Vincenzo Nardi-Dei)
>Subject: Re: telomeres
>Date: 18 May 1994 20:12:47 -0700


>Also I am remembering, when I was child, my father used to cut a branch 
>from a tree, put it in the ground and it grew again to become a new tree.
>From this second tree he could cut an other branch, put in the ground
>and so on endlessly. So, do plants have telomeric regulation systems?
>And if they have not, how do they in normal conditions do not develop
>cancer, but cells grow in a differentiated way, generating organs,
>stopping their growth at certain moments and, apoptosysly, leaves 
>fall?

Vinc,
I also remember some scenes, where we digged branches in our garden, but 
in fact, they never grew out! Highly specialized cells are necessary for 
*infinite* replication. You are right: most of the cells of a plant having 
undergone differentiation to specialized functions will not suffice the 
requirements for reproduction.

Manuel 





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