Aqueous solution, 10 mM, of cyclohexanecarboxylic, cyclohexylacetic, cyclohexylpropionic, cyclohexylbutyric acids (all components of naphthenic acid); cis-1,2-, and trans-1,4-cyclohexyldicarboxylic acids; 3-cyclohexene-1-carboxylic and cyclohexylsulfamic acids; and cyclohexyl mercaptan were applied to 14-day-old bush bean plants, Phaseolus vulgaris L. cv. Top Crop. Only cyclohexanecarboxylic and cyclohexylacetic acid resulted in a statistically significant (P = 0.05) increase in pod production

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... er plant in all experiments. The stimulation by the first four monocarboxylic acids decreased as the number of methylene groups in the side chain increased from 0 to 3. The effective compounds possessed an H-saturated 6-carbon ring with a single carboxyl group attached directly to the ring or separated from it by no more than one methylene group. 2Abbreviations: CHC: cyclohexanecarboxylic acid, Cdi1ICOOH; CHAc: cyclohexylacetic acid, CJIauCH2COOH; CHP: cyclohexylpropionic acid, CRH1,(CH2)2COOH; CHB: cyclohexylbutyric acid, C6Hll(CH2)3COOH; cis-CHDC: cis-1,2-cyclohexyldicarboxylic acid, C6H,o(COOH)2; trans-CHDC: trans-1,4-cyclohexyldicarboxylic acid, C6Hio(COOH)2; CHM: cyclohexyl mercaptan (cyclohexanethiol), CaH11SH; CHS: cyclohexylsulfamic acid, CGHnNHSO3H; CHeC: 3cyclohexene-1-carboxylic acid, C6H9COOH. 656 www.plantphysiol.org on July 22, 2018 -Published by Downloaded from