Auxin-gibberellin relationships in their effects on hypocotyl elongation of light-grown cucumber seedlings V. Reversal of N, N'-dicyclohexylcarbodiimide-induced inhibition of section growth by some adenine nucleotides and gibberellin A3

DCCD, an inhibitor of membrane-bound ATPases, markedly inhibitedboth the endogenous and IAA-induced growth of cucumber hypocotylsections. The inhibition was negated by the simultaneous applicationof ADP, ATP and 3',5'-cyclic AMP. The effect of these nucleotideswas similar to that of GA₃. Adenine, adenosine, AMP, 2',3'-cyclicAMP, CTP, GTP, ITP and UTP were all ineffective. (Received April 26, 1976; )