The decrease in auxin polar transport down the lupin hypocotyl could produce the indole-3-acetic Acid distribution responsible for the elongation growth pattern.

Abstract

The variation of indole-3-acetic acid (IAA) transport along Lupinus albus L. hypocotyls was studied using decapitated seedlings and excised sections. To confirm that the mobile species was IAA and not IAA metabolites, dual isotope-labeled IAAs, [5-(3)H]IAA + [1-(14)C]IAA, were used. After apical application to decapitated seedlings, the longitudinal… (More)

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