Leaf-closing substance in Leucaena leucocephala |
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| Authors: | Sohtome Yoshihiro Tokunaga Takashi Ueda Katsuhiro Yamamura Shosuke Ueda Minoru |
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| Affiliation: | Department of Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi, Yokohama, Japan. |
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| Abstract: | Potassium (2R,3R)-2,3,4-trihydroxy-2-methylbutanoate (1) was identified as a leaf-closing substance in the nyctinastic plant, Leucaena leucocephala. Compound 1 showed strong leaf-closing activity toward L. leucocephala and was not effective against other nyctinastic plants. The potassium ion was indispensable for the bioactivity of 1. Compound 1 gradually lost its bioactivity because of the exchange of the counter cation during isolation. A leaf-opening substance was also observed in the same plant. |
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