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- W2380758314 abstract "Methyl jasmonate is a signaling molecule that is mediated through air between plants. It plays important role in activating self-defensive system and induces secondary metabolites production in plants. One of the most important defensive systems in allelopathic rice varieties against associated weeds is to produce and release allelochemicals. Therefore, inducible effects by methyl jasmonate on rice allelochemicals production were investigated under both laboratory and field conditions. The results demonstrated that rice allelochemicals (m-arabinose-pentadecanyl-resorcinol, m-arabinose- pentadecenyl-8-resorcinol, 7-xylose-luteolin, 3-glucose-hydroxmaic acid and 3-glucose -7-methoxy-hydroxamic acid) productions were elicited by exogenously applied methyl jasmonate in rice leaves. This inducible effect was dose-dependent and inducible period-dependent. The application of 0.4mmol/L methyl jasmonate effectively induced to synthesize significant amounts of allelochemicals in allelopathic rice plants in the laboratory and field. The levels of allelochemicals increased rapidly in methyl jasmonate-elicited rice leaves and reached maximum values in 48h after treatments. Furthermore, the inducible response to allelochemical production depended on different rice varieties. Allelopathic rice varieties, PI312777 and Fenghuazhan, could be induced to synthesize a large amount of allelochemicals by methyl jasmonate at different concentrations. However, allelochemicals amounts of non-allelopathic Huajingxian were slightly increased and could not reach the levels to express its allelopathic potential. In addtion, the inducible effects by methyl jasmonate on rice allelochemicals also were time-dependent and could not be maintained for a long period. As a result, rice allelochemical production began 12h after treatment with methyl jasmonate and required 48h for obtaining a maximum accumulation, and then allelochemical amounts were gradually reduced. The results showed that the accumulation of rice allelochemicals in response to exogenous methyl jasmonate was dynamic, and the allelochemical production in rice plant could be triggered by exogenously applied methyl jasmonate. This finding suggests that allelochemical elicitation by exogenously applied methyl jasmonate is worthwhile in future study for the understanding of allelopathic rice variety against associated weeds." @default.
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- W2380758314 date "2004-01-01" @default.
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- W2380758314 title "Inducible effects of methyl jasmonate on allelochemicals from rice" @default.
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