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Brassinolide and Homobrassinolide Promotion of Lamina Inclination of Rice Seedlings |
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| Authors: | Wada Kojiro; Marumo Shingo; Ikekawa Nobuo; Morisaki Masuo; Mori Kenji |
| Institution: | 1Department of Agricultural Chemistry, Nagoya University Nagoya 464, Japan 2Laboratory of Chemistry for Natural Products, Tokyo Institute of Technology Nagatsuta, Midori-ku, Yokohama 227, Japan 3Department of Agricultural Chemistry, The University of Tokyo Yayoi 1-1-1, Bunkyo-ku, Tokyo 113, Japan |
| Abstract: | Brassinolide, a new plant growth-promoting steroid lactone,and its synthetic analog, homobrassinolide, showed strong activityin stimulating the lamina inclination of rice plants at verylow concentrations of 0.0005 and 0.005 µg/ml, respectively,whereas IAA showed only a weak effect on the lamina inclinationat 50 µg/ml. Thus, the lamina inclination test is usefulas a highly sensitive bioassay for brassinolide and relatedcompounds. (Received November 26, 1980; Accepted December 22, 1980) |
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