Department of Plant Pathology and Weed Research, Plant Protection Institute, Agricultural Research Organization, Volcani Center, Rishon LeZion, Israel.
School of Plant Sciences and Food Security, Tel Aviv University, Tel Aviv, Israel.
Plant Cell Environ. 2021 Jul;44(7):2277-2289. doi: 10.1111/pce.14006. Epub 2021 Feb 15.
Plants employ systemic-induced resistance as part of their defence arsenal against pathogens. In recent years, the application of mild heating has been found to induce resistance against several pathogens. In the present study, we investigated the effect of root zone warming (RZW) in promoting tomato's resistance against the necrotrophic fungus Botrytis cinerea (Bc), the hemibiotrophic bacterium Xanthomonas campestris pv. vesicatoria (Xcv) and the biotrophic fungus Oidium neolycopersici (On). We demonstrate that RZW enhances tomato's resistance to Bc, On and Xcv through a process that is dependent on salicylic acid and ethylene. RZW induced tomato immunity, resulting in increased defence gene expression, reactive oxygen species (ROS) and ethylene output when plants were challenged, even in the absence of pathogens. Overall, the results provide novel insights into the underlying mechanisms of warming-induced immune responses against phytopathogens with different lifestyles in tomato.
植物利用系统性诱导抗性作为其防御病原体的武器库的一部分。近年来，人们发现轻度加热可以诱导植物对几种病原体产生抗性。在本研究中，我们调查了根区加热（RZW）对促进番茄抵抗坏死真菌灰葡萄孢（Bc）、半活体细菌丁香假单胞菌 pv.vesicatoria（Xcv）和活体真菌辣椒尾孢（On）的影响。我们证明，RZW 通过依赖水杨酸和乙烯的过程增强了番茄对 Bc、On 和 Xcv 的抗性。RZW 诱导番茄免疫，当植物受到挑战时，即使没有病原体，也会导致防御基因表达、活性氧（ROS）和乙烯的产生增加。总的来说，这些结果为番茄中不同生活方式的植物病原体诱导免疫反应的潜在机制提供了新的见解。
