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3n, 4n, 8n. What do they mean?

This is a discussion on 3n, 4n, 8n. What do they mean? within the New Growers: Ask the Senior Members forums, part of the New Growers category; This is very interesting. I have never heard of treating plants with colchicine. I'm only ...

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  1. #11
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    This is very interesting. I have never heard of treating plants with colchicine. I'm only familiar with it as a treatment for gout, though I guess it would work to inhibit mitosis (It's a microtubule inhibitor. Microtubules sort of act as the railroad that carts things, including DNA, around a cell). Anyone know how this is done? Do you just add it to the water? I am intrigued.

  2. #12
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    Colchicine can be applied as a cream to the growing part of the plant. Or additionally, the seeds may be soaked in the solution before sowing them. These are crude methods and what may be used in non-laboratory conditions. Truly speaking, to induce polyploidy, one needs to 1st culture the cells on culture media. these cells may be plated on a media which contains colchicine and then sub-culutred onto a regular growing medium after allowing the cells to divide once or so. Each stage must be monitored with microscopy.

    Alternatively, somatic cells of the parent plants may be fused by a process called SOMATIC CELL HYBRIDIZATION to induce polyploidy. This is much more complex a procedure.

    As far as Colchicine goes, as pointed out by BKirk783, it acts as a microtubular inhibitor. It is actually an alkaloid derived from plants. It can be used in treatment of cancer as the cancer cells are more active due to rapid multiplication - it thus stops the multiplicating cells and induces a static change in the cancer cells allowing them to be phagocytosed or eaten away by the body's immune system. However, due to availability of better, less toxic drugs, it isn't used for the purpose as higher doses are required. It is however used in gout in humans in lower doses. Other use includes cytogenetics which is what we've been discussing so far. Besides colchicine, another alkaloid called vincristine and vinblastine, both Vinca alkaloids are also used in cytogenetics.

  3. #13
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    Wow. What a Thread! Can't believe i stayed away so long !! HI ALL..

  4. #14
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    Jeeze guys, thanks! This thread has explained triploidy and polyploidy very well.....

  5. #15
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    Quote Originally Posted by navyderek View Post
    Jeeze guys, thanks! This thread has explained triploidy and polyploidy very well.....
    And then some. Thank you guys!

    Cheers,
    BD

  6. #16
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    Wow! I'm impressed! So much for me watching the TV series Mutant X! LOL!

  7. #17
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    Information overload but very impressive. I've wondered but never had the time to check. Thanks, Guys.

  8. #18
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    Awesome explanations. Thanks Laurent and Kailash

  9. #19
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    yes, very interesting explanation, thanks.

    then, the 4n or 8n are like mutantes?

  10. #20
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    Yes, they are like 'mutants' in plain words.
    Am glad that I could be of some help and could share this knowledge with everyone.

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