Department of Plant Pathology and Weed Research, Agricultural Research Organization, Volcani Institute, 68 Hamakabim Rd., Rishon LeZion 7534509, Israel.
Agricultural Research Organization, Gilat Research Center, D.N. Negev 2, Bet Dagan 85280, Israel.
Phytopathology. 2022 Nov;112(11):2360-2371. doi: 10.1094/PHYTO-02-22-0052-R. Epub 2022 Nov 22.
Nutrient elements play essential roles in plant growth, development, and reproduction. Balanced nutrition is critical for plant health and the ability to withstand biotic stress. Treatment with essential elements has been shown to induce disease resistance in certain cases. Understanding the functional mechanisms underlying plant immune responses to nutritional elements has the potential to provide new insights into crop improvement. In the present study, we investigated the effect of various elements-potassium (K), calcium (Ca), magnesium (Mg), and sodium (Na)-in promoting resistance against the necrotrophic fungus and the hemibiotrophic bacterium in tomato. We demonstrate that spray treatment of essential elements was sufficient to activate immune responses, inducing defense gene expression, cellular leakage, reactive oxygen species, and ethylene production. We report that different defense signaling pathways are required for induction of immunity in response to different elements. Our results suggest that genetic mechanisms that are modulated by nutrient elements can be exploited in agricultural practices to promote disease resistance.
营养元素在植物的生长、发育和繁殖中起着至关重要的作用。均衡的营养对于植物的健康和抵御生物胁迫的能力至关重要。在某些情况下，施用必需元素已被证明可以诱导抗病性。了解植物对营养元素的免疫反应的功能机制有潜力为作物改良提供新的见解。在本研究中，我们研究了各种元素——钾（K）、钙（Ca）、镁（Mg）和钠（Na）——在促进番茄抵抗坏死真菌 和半生物性细菌 的作用。我们证明，必需元素的喷雾处理足以激活免疫反应，诱导防御基因表达、细胞渗漏、活性氧和乙烯的产生。我们报告说，不同的防御信号通路需要不同的元素来诱导免疫。我们的结果表明，受营养元素调节的遗传机制可以在农业实践中被利用来促进抗病性。
