Plant Growth Retardant B-995: A Possible Mode of Action

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Science  11 Jun 1965:
Vol. 148, Issue 3676, pp. 1469-1471
DOI: 10.1126/science.148.3676.1469


Inhibition of shoot elongation in dwarf and tall peas by the 1,1-dimethylhydrazide of succinic acid (B-995) was correlated with the inhibition of the oxidation of tryptamine-2-C14 to indoleacetaldehyde-2-C14 in homogenates prepared from epicotyls of young plants treated with B-995. The growth-retarding action of B-995 is attributed to the formation of 1,1-dimethylhydrazine in vivo. This hydrazine strongly inhibited tryptamine oxidation by pea epicotyl homogenates.