Isolation and identification of plant growth inhibitors as candidate(s) for allelopathic substance(s), from aqueous leachate from mesquite (Prosopis juliflora (Sw.) DC.) leaves |
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Authors: | Hiroshi Nakano Yoshiharu Fujii Kosumi Yamada Seiji Kosemura Shosuke Yamamura Koji Hasegawa Takahisa Suzuki |
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Affiliation: | (1) Doctoral Program in Agricultural Sciences, University of Tsukuba, 305-8572 Tsukuba, Japan (;(2) National Institute of Agro-Environmental Sciences, 305-8604 Tsukuba, Japan;(3) Institute of Applied Biochemistry, University of Tsukuba, 305-8572 Tsukuba, Japan;(4) Department of Chemistry, Faculty of Science and Technology, Keio University, 223-0061 Hiyoshi, Japan |
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Abstract: | As candidate(s) for allelopathic substance(s), two plant growthinhibitors were isolated from aqueous leachate of leaves of mesquite, whichshowa strong allelopathy, and which were identified as syringin and(–)-lariciresinol by their spectral analyses. Syringin inhibited root andshoot growth of lettuce seedlings at concentrations greater than 0.8M, and root and shoot growth of barnyard grass seedlings atconcentrations greater than 2.7 and 26.9 M, respectively. Onthe other hand, (–)-lariciresinol inhibited root and shoot growth oflettuce seedlings at concentrations greater than 2.8 and 0.8M,and root and shoot growth of barnyard grass seedling at concentrations greaterthan 0.8 and 2.8 M, respectively. The contents of syringin and(–)-lariciresinol in the rhizosphere soil of mesquite were 0.34 and 0.38g/g soil, respectively. These results indicate that syringinand (–)-lariciresinol are allelopathic substance(s), and may play rolesinthe allelopathy of mesquite. |
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Keywords: | Allelopathic substance Allelopathy Growth-inhibitory substance (– )-Lariciresinol Leaf exudate Mesquite Prosopis juliflora Syringin |
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