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Thread: Do clone lines eventually decline?

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    Natalie's Avatar
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    Do clone lines eventually decline?

    Today I was thinking about how when cell cultures (human cell cultures, at least) grow for too long, they eventually decline and die because mitosis shortens the protective telomeres on the ends of the chromosomes to the point where the coding DNA becomes damaged and the cell cannot divide anymore. Would this happen to clone lines of Sarracenia as well? Or does this genus (and other plants adapted to reproduce vegetatively) have some sort of protection against that? What's the oldest clone of Sarracenia still currently being cultivated?

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    i dont do pots. amphirion's Avatar
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    plants in general are capable to maintain telomere lengths much longer than animal cells--hence the reason why we have plants/trees that are capable of living hundreds even thousands of years. im sure that it varies from species to species, but in the case of sarracenia, i can think of S. 'adrian slack' which came into existence back in the 1980s, but wasnt published until 2000...
    " You keep using that word. I do not think it means what you think it means." -Inigo Montoya
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    Over the years, some tissue cultured material -- particularly callus -- can develop an insensitivity to some plant growth regulators; but that is more the case with Dionaea and some other genera . . .
    “Sì perché l'autorità dell'opinione di mille nelle scienze non val per una scintilla di ragione di un solo . . ."

    -- Galileo "Biff" Galilei

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    Natalie's Avatar
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    Crazy.... Longer telomeres makes sense. Geneticists should find a way to increase the length of mammal's telomeres and see it increases their lifespan!

    BigBella, does that mean the plants have uncontrolled cell growth or that growth slows/stops? Is there something special about calluses that makes them behave that way?

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    Quote Originally Posted by Natalie View Post
    Crazy.... Longer telomeres makes sense. Geneticists should find a way to increase the length of mammal's telomeres and see it increases their lifespan!

    BigBella, does that mean the plants have uncontrolled cell growth or that growth slows/stops? Is there something special about calluses that makes them behave that way?
    Calluses are simply wads of undifferentiated tissue, which are capable, in turn, of producing whole plants -- the whole notion of totipotency; but left to their own devices (without the influence of plant growth regulators), will just continue to divide for months on end. Depending upon the species, I have had containers brimming with the stuff.

    Broadly speaking, the addition of 6-Benzylaminopurine (BAP), one of several cytokinins will induce the formation of shoots and leaves; and an auxin such as 1-Napthaleneacetic acid (NAA), will induce rooting; though there is some overlap in function . . .
    “Sì perché l'autorità dell'opinione di mille nelle scienze non val per una scintilla di ragione di un solo . . ."

    -- Galileo "Biff" Galilei

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