potassium - calcium Ca 2+ component of middle lamella of...

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potassium K + involved in osmosis, ionic balance, opening and closing of stomata; activator of enzymes; necessary for starch formation weak, spindly stems and roots; older leaves especially affected—mottled with dead spots along margins and dead tips; roots more susceptible to disease
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Unformatted text preview: calcium Ca 2+ component of middle lamella of cell walls; enzyme cofactor; involved in membrane permeability; component of calmodulin (regulator of membrane and enzyme activities) root and shoot tips die; young leaves and shoots most affected, die back at tips and margins first...
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This note was uploaded on 11/14/2011 for the course BIO 1421 taught by Professor Farr during the Fall '08 term at Texas State.

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