auxin/cytokinin

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auxin/cytokinin

Post  ylk001 on Mon Jan 28, 2008 11:52 pm

I know that auxin stimulates stem elongation,
but i'm confused on its function in cell differentiation along with cytokinin
on page 796 of the textbook,it says
if cytokinin levels are raised, shoot buds develop from the callus and if auxin levels are raised, roots form
can you explain this for me?

ylk001

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Re: auxin/cytokinin

Post  TA Dana on Tue Jan 29, 2008 12:20 am

The book was referring to ratio levels of both auxin and cytokinin that when the concentration of auxin is higher than the concentration of cytokinin, there would be root development. But if the concentration of cytokinin was higher than auxin, then there would be leaf development.

BUT, I don't think Dr. Wasserman went into all that details. Just know that auxin promote rooting, inhibits lateral growth where as cytokinin promotes cell division and these two hormones are antagonists of each other.

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