Fluorescence studies on nyctinasty using fluorescence labeled cis-p-coumaroylagmatine, a leaf-opening substance of Albizzia plants: existence of genus-specific receptor for leaf-movement factor
摘要:
We developed fluorescent probes (1 and 2) based on the structure of cis-p-coumaroylagmatine (3), a leaf-opening Substance of Albizzia julibrissim Durazz. These probes were effective for the leaf-opening of A. julibrissin, and specifically bind to the motor cell of this plant. Moreover, binding of the fluorescent probe was specific to the plant motor cell contained in the plants belonging to the Albizzia genus. These results showed that the binding of a probe compound with a motor cell is specific to the plant genus and suggested that the genus-specific receptor molecule Cor the leaf movement factor on a motor cell Would be involved in nyctinasty. (C) 2003 Elsevier Science Ltd. All rights reserved.
Double Fluorescence-labeling Study on Genus<i>Albizzia</i>Using a Set of Fluorecence-labeled Leaf-movement Factors to Identify the Spatial Distribution of Their Receptors
We synthesized rhodamine-labeled leaf-opening factor of genus Albizzia. We carried out double fluorescence-labeling study on genus Albizzia using rhodamine-labeled leaf-opening factor and fluorescein-labeled leaf-closing factor. This study showed that both probes bound the same motor cell. These results indicated that each motor cell had both receptors for leaf-opening and leaf-closing factors.
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.
Fluorescence studies on nyctinasty using fluorescence labeled cis-p-coumaroylagmatine, a leaf-opening substance of Albizzia plants: existence of genus-specific receptor for leaf-movement factor
We developed fluorescent probes (1 and 2) based on the structure of cis-p-coumaroylagmatine (3), a leaf-opening Substance of Albizzia julibrissim Durazz. These probes were effective for the leaf-opening of A. julibrissin, and specifically bind to the motor cell of this plant. Moreover, binding of the fluorescent probe was specific to the plant motor cell contained in the plants belonging to the Albizzia genus. These results showed that the binding of a probe compound with a motor cell is specific to the plant genus and suggested that the genus-specific receptor molecule Cor the leaf movement factor on a motor cell Would be involved in nyctinasty. (C) 2003 Elsevier Science Ltd. All rights reserved.