Bioscience, Biotechnology and Biochemistry p. 2133 - 2137 (1998)
Update date:2022-09-26
Topics:
Ueda, Minoru
Sawai, Yoshiyuki
Shibazaki, Yuichiro
Tashiro, Chitose
Ohnuki, Takashi
Yamamura, Shosuke
cis-p-Coumaroylagmatine (1) was isolated from Albizzia julibrissin Durazz, a nyctinastic plant, as a leaf-opening substance. The compound was quite effective for opening the plant leaves at 5 × 10-6 M at night, but was not effective for other nyctinastic plants. The bioactive fraction with leaf-closing activity was also separated from the plant extract. Although the leaf-opening activity of the plant extract changed between the day and night, the content of 1 was almost constant through a 24-h day. These results suggest that the change in content of an unknown leaf-closing factor induced balance between the two leaf-movement factors through a 24-h day.
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