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| Vinegar residue biochar regulates the systemic resistance of tomato under Fusarium oxysporum stress |
| Received:August 05, 2021 |
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| KeyWord:tomato Fusarium wilt;Fusarium oxysporum;biochar;systemic resistance |
| Author Name | Affiliation | E-mail | | PEI Guangpeng | School of Resource and Environment, Shanxi Agricultural University, Taigu 030801, China
School of Environment Science and Resources, Shanxi University, Taiyuan 030006, China | | | LI Yuxin | School of Environment Science and Resources, Shanxi University, Taiyuan 030006, China | | | ZHU Yuen | School of Environment Science and Resources, Shanxi University, Taiyuan 030006, China | | | LIU Wei | Science & Technology Information and Strategy Research Center of Shanxi, Taiyuan 030024, China | | | LI Hua | School of Environment Science and Resources, Shanxi University, Taiyuan 030006, China | lihua@sxu.edu.cn |
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| Abstract: |
| To explore the effects and possible mechanisms associated with biochar-elicited suppression of soil-borne diseases and improved plant performance, pot experiments were used to explore the ability of biochar to induce systemic resistance in tomato against Fusarium wilt caused by a soil-borne pathogen, Fusarium oxysporum f. sp. lycopersici Snyder and Hansen. Results showed that biochar application significantly reduced tomato disease severity. The photosynthetic pigments and malondialdehyde content of tomato leaves were significantly decreased and increased, respectively under F. oxysporum stress, and the application of biochar significantly reduced the changes in photosynthetic pigments and malondialdehyde content. The activity of peroxidase in tomato significantly reduced, whereas the activity of "detoxification enzymes"(including catalase, superoxide dismutase, glutathione reductase, and glutathione S-transferase) significantly increased during the biochar treatment. The content of oxidized glutathione in tomato was significantly increased under F. oxysporum stress. The application of biochar(3%) significantly reduced the content of oxidized glutathione but significantly increased the content of reduced glutathione, indicating that the biochar could enhance the removal efficiency of active oxygen in tomato. In addition, application of biochar could enhance the priming effect and ability of tomato system against F. oxysporum invasion, which is mainly dependent on the pathway mediated by jasmonic acid and ethylene. Specifically, with the treatment of biochar, the relative expression of salicylic acid-related genes(PR1a, MPK2, and NPR1) was down-regulated, while the relative expressions of jasmonic acid-related genes (DEF1, JAZ1, and JAZ3) and ethylene-related genes(ACO1 and ACS) were up-regulated. The above results indicate that the application of biochar can enhance the resistance ability of tomato system to defend against F. oxysporum stress. |
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