title: Leaf-opening Substance in the Nyctinastic Plant, Albizzia julibrissin Durazz.
abstract: 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.
authors.affiliation: a Department of Chemistry, Faculty of Science and Technology, Keio University.
authors.forename: M
authors.initials: M
authors.lastname: Ueda
authors.affiliation: a Department of Chemistry, Faculty of Science and Technology, Keio University.
authors.forename: Y
authors.initials: Y
authors.lastname: Sawai
authors.affiliation: a Department of Chemistry, Faculty of Science and Technology, Keio University.
authors.forename: Y
authors.initials: Y
authors.lastname: Shibazaki
authors.affiliation: a Department of Chemistry, Faculty of Science and Technology, Keio University.
authors.forename: C
authors.initials: C
authors.lastname: Tashiro
authors.affiliation: a Department of Chemistry, Faculty of Science and Technology, Keio University.
authors.forename: T
authors.initials: T
authors.lastname: Ohnuki
authors.affiliation: a Department of Chemistry, Faculty of Science and Technology, Keio University.
authors.forename: S
authors.initials: S
authors.lastname: Yamamura
keywords: Albizzia julibrissin Durazz; biological clock; cis-p-coumaroylagmatine; leaf-opening substance; nyctinasty