Enhanced Resistance to Leaf Fall Disease Caused by in Rubber Tree Seedling by Extract.

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ID: 15709
2019
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Abstract
The brown seaweed ( C. Agardh-Sargassaceae) extract was examined for its bioelicitor properties in the rubber tree seedling ( (Willd. ex A.Juss.) Müll.Arg. - Euphorbiaceae) and its application to reduce the leaf fall disease caused by (Edwin John) Butler, 1917 (Peronosporaceae). The major purpose of this study was to apply this seaweed extract (SWE) to improve the disease resistance in rubber tree seedling compared to a chemical fungicide (1% metalaxyl). After foliar spraying of SWE solution, two antioxidant enzymes, catalase (CAT) and peroxidase (POD) and systemic acquired resistance (SAR)-triggered enzyme, β-1,3-glucanase (GLU), were analyzed. Both secondary metabolites, a phytoalexin scopoletin (Scp) and a signaling molecule salicylic acid (SA) were measured by high performance liquid chromatography (HPLC). Both SWE- and metalaxyl-treated plants had a close disease index (DI)-score which were 16.90 ± 1.93 and 15.54 ± 1.25, respectively, while the positive control sprayed with showed DI-score of 29.27 ± 1.89 which was much higher than those treated with SWE or fungicide. CAT, POD, and GLU were increased in rubber tree leaves treated with SWE solution. Furthermore, Scp and SA were significantly increased in SWE-treated leaves. Enhanced systemic acquired resistance induction, 2.09 folds of SA accumulation, was observed in the distal area comparing to the local area of SWE application. In conclusion, the positive effects of SWE elicitation from these studies revealed that SWE could be used as an alternative biocontrol agent for foliar spraying to enhance the defense responses in rubber tree seedling against .
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khompatara2019enhancedplants Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Khompatara, Khemmikar;Pettongkhao, Sittiporn;Kuyyogsuy, Arnannit;Deenamo, Nuramalee;Churngchow, Nunta;
Journal Plants (Basel, Switzerland)
Year 2019
DOI
E168
URL
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