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Trichoderma harzianum T-22 induces systemic resistance in tomato infected by Cucumber mosaic virus.

机译:哈茨木霉T-22在黄瓜花叶病毒感染的番茄中诱导系统抗性。

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摘要

Understanding the induction of plant defenses against viruses using biocontrol\udagents is essential for developing new strategies against these pathogens, given the\udineffectiveness of chemical treatments. The ability of Trichoderma harzianum, strain\udT-22 (T22) to control Cucumber mosaic virus (CMV) in Solanum lycopersicum var.\udcerasiforme plants and the changes in the physiology of tomato treated/infected with\udT22/CMV were examined. Plant growth-promoting effects, photosynthetic performance,\udreactive oxygen species scavenging enzymes, and phytohormones were investigated.\udT22 improved tomato growth in terms of plant height and improved photosynthesis, total\udchlorophyll content and plant gas exchange. In contrast, CMV induced a negative effect\udon dry matter accumulation and inhibited the photosynthetic capacity. The analysis\udof plant hormones demonstrated that treating with T22 before or simultaneously to\udCMV infection, led to a systemic resistance by jasmonic acid/ethylene and salicylic\udacid signaling pathways. Conversely, systemic resistance was abscissic acid-dependent\udwhen T22 treatment was administered after the CMV infection. In conclusion, the data\udreported here indicate that the T22-based strategy may be the most effective measure\udagainst CMV.
机译:考虑到化学处理的有效性,了解使用生物防治\药物来诱导植物防御病毒对于开发针对这些病原体的新策略至关重要。研究了哈茨木霉,\ udT-22(T22)菌株对茄形番茄\ udcerasiforme植物中黄瓜花叶病毒(CMV)的控制能力以及用\ udT22 / CMV处理/感染的番茄的生理变化。研究了植物的促生长作用,光合性能,\无活性氧清除酶和植物激素。\ udT22在株高方面改善了番茄的生长,并改善了光合作用,总\ udphyl含量和植物气体交换。相比之下,CMV会引起负面影响\乌冬面干物质积累并抑制光合能力。对植物激素的分析显示,在感染udCMV之前或同时用T22进行处理,会导致茉莉酸/乙烯和水杨酸/ udacid信号通路产生全身性耐药。相反,当在CMV感染后进行T22治疗时,全身抵抗是依赖于脱落酸的。总之,此处未报告的数据表明,基于T22的策略可能是最有效的措施,也可能是对抗CMV的方法。

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