Wheat straw biochar amendment suppresses tomato bacterial wilt caused by Ralstonia solanacearum:Potential effects of rhizosphere organic acids and amino acids
Wheat straw biochar amendment suppresses tomato bacterial wilt caused by Ralstonia solanacearum:Potential effects of rhizosphere organic acids and amino acids
复制标题
麦秆生物炭改良剂抑制青枯菌引起的番茄青枯病：根际有机酸和氨基酸的潜在影响
DOI：
10.1016/s2095-3119(20)63455-4
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发表时间：
2021
影响因子：
4.8
通讯作者：
Cai Kunzheng
中科院分区：
文献类型：
--
作者：
Tian Jihui;Rao Shuang;Gao Yang;Lu Yang;Cai Kunzheng
生物炭对番茄青枯病的抑制作用是基于寄主植物、根际微生物和土壤微环境的复杂相互作用。本研究旨在评价生物炭改良剂对番茄青枯病的防治效果，并探讨生物炭改良剂对番茄青枯病根际化合物组成、病原菌和番茄生长的影响。结果表明，生物炭改良剂在降低番茄青枯病发病率的同时，还能促进植物生长。生物炭正效应可能与微生物活性增强和根际有机酸和氨基酸组成的变化有关生物炭诱导根际柠檬酸和赖氨酸增加，但水杨酸减少，从而提高了微生物活性，使根际不适合青枯病菌的生长。此外，通过刺激微生物活动使更多可利用的营养物质或由生物炭提供的营养物质可以提高植物活力，潜在地增强番茄对病害的抗性。我们的研究结果强调，生物炭控制番茄青枯病的能力可能与根际有机酸和氨基酸组成的变化有关，然而，还需要在田间条件下进一步研究以验证这些‘生物炭效应’。
Complex interactions based on host plant,rhizosphere microorganisms and soil microenvironment are presumed to be responsible for the suppressive properties of biochar against soil-borne diseases,although the underlying mechanisms are not well understood.This study is designed to evaluate the efficacy of biochar amendment for controlling tomato bacterial wilt caused by Ralstonia solanacearum,and to explore the interactions between biochar-induced changes in rhizosphere compound composition,the pathogen and tomato growth.The results showed that biochar amendment decreased disease incidence by 61–78% and simultaneously improved plant growth.The positive ‘biochar effect' could be associated with enhanced microbial activity and alterations in the rhizosphere organic acid and amino acid composition.Specifically,elevated rhizosphere citric acid and lysine,but reduced salicylic acid,were induced by biochar which improved microbial activity and rendered the rhizosphere unsuitable for the development of R.solanacearum.In addition,nutrients which were either made more available by the stimulated microbial activity or supplied by the biochar could improve plant vigor and potentially enhance tomato resistance to diseases.Our findings highlight that biochar's ability to control tomato bacterial wilt could be associated with the alteration of the rhizosphere organic acid and amino acid composition,however,further research is required to verify these ‘biochar effects' in field conditions.