THE RELATIONSHIP OF STRUCTURE AND PLANT-GROWTH ACTIVITY OF SUBSTITUTED BENZOIC AND PHENOXYACETIC ACIDS

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Abstract
The effects of benzoic acid and 26 derivatives on the elongation of Avena coleoptile sections are reported. Only those with an electronegative atom or group capable of displacement by an electron-rich substrate in one or both ortho positions can promote elongation. A mechanism of reaction of the growth regulator with the plant substrate based upon electronic characteristics of active benzoic acids and phenoxyacetic acids is described.

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