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
