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2023 Volume 2 Issue 5
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LI Jixiu, ZHU Xiaowei, WANG Ye, et al. The Effects of 0.53% Daphnetin EC on Inducing Tobacco Resistance to Tobacco Bacterial Wilt[J]. PLANT HEALTH AND MEDICINE, 2023, (5): 33-40. doi: 10.13718/j.cnki.zwyx.2023.05.004
Citation: LI Jixiu, ZHU Xiaowei, WANG Ye, et al. The Effects of 0.53% Daphnetin EC on Inducing Tobacco Resistance to Tobacco Bacterial Wilt[J]. PLANT HEALTH AND MEDICINE, 2023, (5): 33-40. doi: 10.13718/j.cnki.zwyx.2023.05.004
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The Effects of 0.53% Daphnetin EC on Inducing Tobacco Resistance to Tobacco Bacterial Wilt

  • 1. School of Plant Protection, Southwest University, Chongqing 400715, China;

  • 2. Chongqing Company of China Tobacco Corporation, Chongqing 400023, China

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  • Received Date: 30/06/2023

  • MSC: S435.1

  • In order to explore the role of daphnetin as a potential new plant elicitor, and clarify control effect of daphnetin on tobacco bacterial wilt, several experiments such as pot experiment, enzyme activity determination and field experiment were performed in this assay. The results showed that daphnetin could effectively reduce the occurrence of tobacco bacterial wilt compared with other plant defense elicitors. The efficiency of induced resistance by daphnetin was still up to 71.66% after 10 days of inoculation with Ralstonia solanacearum. Daphnetin can significantly increase the activities of superoxide dismutase, catalase and polyphenol oxidase in tobacco leaves, and the enzyme activities reached to the maximum value at 10 min, 12 h and 24 h, at 169.02 U/g, 145.42 U/g and 111.51 U/g, respectively. Field experiment showed that daphnetin promoted tobacco growth, and during outbreak period of bacterial wilt disease, daphnetin significant induced systemic resistance of tobacco with a control efficiency of 44.33%. These results showed that daphnetin can be considered as a plant-derived resistance inducer for controlling tobacco bacterial wilt, which could provide theoretical support for the green prevention and control of plant disease.
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The Effects of 0.53% Daphnetin EC on Inducing Tobacco Resistance to Tobacco Bacterial Wilt

  • Received Date: 30/06/2023

Abstract: In order to explore the role of daphnetin as a potential new plant elicitor, and clarify control effect of daphnetin on tobacco bacterial wilt, several experiments such as pot experiment, enzyme activity determination and field experiment were performed in this assay. The results showed that daphnetin could effectively reduce the occurrence of tobacco bacterial wilt compared with other plant defense elicitors. The efficiency of induced resistance by daphnetin was still up to 71.66% after 10 days of inoculation with Ralstonia solanacearum. Daphnetin can significantly increase the activities of superoxide dismutase, catalase and polyphenol oxidase in tobacco leaves, and the enzyme activities reached to the maximum value at 10 min, 12 h and 24 h, at 169.02 U/g, 145.42 U/g and 111.51 U/g, respectively. Field experiment showed that daphnetin promoted tobacco growth, and during outbreak period of bacterial wilt disease, daphnetin significant induced systemic resistance of tobacco with a control efficiency of 44.33%. These results showed that daphnetin can be considered as a plant-derived resistance inducer for controlling tobacco bacterial wilt, which could provide theoretical support for the green prevention and control of plant disease.

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