On the Mechanism of Action of Growth Regulators | Zendy

Robert Muir | Zendy; Corwin Hansch | Zendy

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On the Mechanism of Action of Growth Regulators

Author(s) -

Robert Muir,

Corwin Hansch

Publication year - 1953

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.28.2.218

Subject(s) - phenylacetic acid , coleoptile , benzoic acid , elongation , chemistry , avena , stereochemistry , ring (chemistry) , side chain , substrate (aquarium) , biochemistry , biology , botany , organic chemistry , ecology , materials science , metallurgy , ultimate tensile strength , polymer

Investigations of the effects of various analogues of indoleacetic acid, phenoxyacetic acid, phenylacetic acid and benzoic acid on the elongation of sections of Avena coleoptiles (7, 8, 16, 17) have led to the conclusion that plant growth-regulators react by a nucleophilic substitution at a position on the ring ortho to the carboxyl group or the side chain carrying this group and with the carboxyl group itself. The evidence at hand indicates tna? a cysteinyl unit of a protein is the most likely substrate for the two-point ortho reaction as illustrated below with 2,4-dichlorophenoxyacetic acid.

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