hydrotropism

Shirley J Rodaway rodawas at basf-corp.com
Wed Jan 24 15:23:47 EST 2001


It is no great secret that nothing can grow without the turgor provided by
water, and that when removal of water by evaporation at a potential growth site
occurs more rapidly than the water is replaced inside the cells (to provide the
turgor forces) then growth will not occur.   This can make it look as if root
growth is actively toward water, when the case is really that growth potential
is actively halted if the there is inadequate water or water vapor to support
it.   Since root growth zones are not well protected against water loss, they
are particularly vulnerable.

Simplistic perhaps, but in a nut shell.



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