Plant-growth inhibitory activity of heliannuol derivatives |
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Authors: | Doi Fuminao Ohara Taiga Ogamino Takahisa Sugai Takeshi Higashinakasu Keiko Yamada Kosumi Shigemori Hideyuki Hasegawa Koji Nishiyama Shigeru |
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Institution: | Department of Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522, Japan. |
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Abstract: | In addition to (+)-, (-)- and (+/-)-heliannuol E, growth-inhibitory activities of five synthetic chromans and four tetrahydrobenzob]oxepins were examined against oat and cress. All heliannuol E isomers exhibited similar biological activities against cress, whereas when tested against oat roots, the unnatural optical isomer (+) showed no inhibitory activity. Four brominated chromans and two tetrahydrobenzob]oxepin derivatives also showed apparent inhibition against both cress and oat. |
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Keywords: | Helianthus annuus L Compositae Heliannuol Plant-growth inhibition Allelochemicals |
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