| 摘要 |
PURPOSE:A plant growth regulator, containing [+]-hexylitaconic acid, dihydro derivative thereof and lower alkyl monoester thereof as an active constituent, and capable of remarkably promoting the root elongation of a plant, e.g. rice plant or lettuce. CONSTITUTION:A plant growth regulator containing one or more compounds selected from the group consisting of [+]-hexylitaconic acid obtained from Aspergillus niger K-88 strain, and expressed by formula I, a dihydro derivative thereof expressed by formula II and lower alkyl monoester thereof, e.g. monomethyl ester derivative expressed by formula III, as an active constituent. The root promoting effect of [+]-hexylitaconic acid, dihydro derivative and monomethyl ester derivative thereof in various concentrations on root elongation of lettuce is shown in the figure.
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