Abstract
Movement ofMimosa pudica L. pulvinules was investigated by using excised ones which were placed on a moist filter paper. The pulvinules excised in the morning opened at the addition of IAA (10−7 M to 10−4M) in the dark. The lag period for the onset of the opening was about 15 min. Na-acetate buffer (pH 4) also induced the opening of pulvinules in the dark, and the buffer-induced opening was inhibited by the uncouplers of oxidative phosphorylation. Na-MES and Na-citrate buffers (pH 4) did not induce the opening.
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