Chemical studies on plant leaf movement controlled by a biological clock
M. Ueda, T. Sugimoto, Y. Sawai, T. Ohnuki, and S. Yamamura
Laboratory of Natural Products, Department of Chemistry,
Faculty of Science and Technology, Keio University, Hiyoshi, Yokohama
223-8522, Japan
Abstract: Most leguminous plants close their leaves
in the evening, as if to sleep, and open them early in the morning according
to the circadian rhythm controlled by a biological clock. Extensive
studies on nyctinastic plants led to the isolation of a variety of leaf-closing
and -opening substances. And we found that the biological clock regulates
the balance of concentration between leaf-opening and -closing substances
in the plant body during the day.
*Pure Appl.Chem. 75,
141�419 (2003). An issue of reviews and research papers based on
lectures presented at the 23rd IUPAC International Symposium on the
Chemistry of Natural Products, Florence, Italy, 28 July � 2 August 2002.
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