672341-24-1Relevant academic research and scientific papers
Leaf-opening Substance in the Nyctinastic Plant, Albizzia julibrissin Durazz
Ueda, Minoru,Sawai, Yoshiyuki,Shibazaki, Yuichiro,Tashiro, Chitose,Ohnuki, Takashi,Yamamura, Shosuke
, p. 2133 - 2137 (1998)
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.
Fluorescence studies on nyctinasty which suggest the existence of genus-specific receptors for leaf-movement factor.
Nagano, Hideharu,Kato, Eisuke,Yamamura, Shosuke,Ueda, Minoru
, p. 3186 - 3192 (2007/10/03)
Periodic leaf-movement of legumes is called nyctinasty and has been known since the age of Alexander the Great. We found that nyctinasty is controlled by a periodic change of the internal concentration of leaf-opening and leaf-closing substances in the plant body. Now, we have developed novel fluorescent probes (1) based on the structure of cis-p-coumaroylagmatine (3), which was isolated as a leaf-opening substance of Albizzia juribrissin Durazz. Binding experiments using probe 1 showed that Albizza plants have receptors for a leaf-opening substance in their motor cells. By using probes 1 we then found that genus-specific receptors are involved in nyctinasty.
