Influence of lead on auxin-induced cell elongation

Influence of lead on auxin-induced cell elongation

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The influence of lead chloride on plant tissue growth is described.Lead reduced elongation of etiolated wheat coleoptile segments, green pea epicotyl fragments and etiolated and green sunflower hypocotyls.Green tissues were Bike Parts - Wheels more susceptible to lead than etiolated ones.PbCl2 in a 10-4 M concentration significantly reduced plastic and elastic extensibility of the wheat coleoptile cell walls and diminished the hydration of Earl Grey Tea sunflower hypocotyl segments.

Auxin (indolyl-3-acetic acid - IAA) applied in concentration optimal for growth of the particular tissues partly attenuated the inhibitory action of lead on elongation, plastic and elastic extensibility and water absorption.Auxin applied in supraoptimal concentrations did not abolish the inhibitory action of lead on tissue growth.