National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, China; Institute of Basic Medical Sciences, College of Basic Medicine, Hubei University of Medicine, Hubei, China.
National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, China.
Plant Sci. 2021 Jan;302:110724. doi: 10.1016/j.plantsci.2020.110724. Epub 2020 Oct 17.
Living in natural environment, plants often suffer from various biotic and abiotic stresses. Phosphate deficiency is a common factor affecting crop production in field, while pathogen invasion is another serious problem. Here we report that Pi-deficient cotton plants exhibit enhanced resistance to Verticillium dahliae. Transcriptomic and histochemical analysis revealed that cotton phenylpropanoid pathway was activated under phosphate deficiency, including lignin and flavonoid biosynthesis. Metabolomic data showed that Pi-deficient cotton accumulates many flavonoids metabolites and displays obvious anti-fungi activity in terms of methanolic extract. Additionally, JA biosynthesis was activated under phosphate deficiency and the Pi-deficiency induced disease resistance was significantly attenuated in GhAOS knock down plants. Taken together, our study demonstrated that phosphate deficiency enhanced cotton resistance to V. dahliae through activating phenylpropanoid pathway and JA biosynthesis, providing new insights into how phosphate deficiency affects plant disease resistance.
生活在自然环境中，植物经常遭受各种生物和非生物胁迫。磷缺乏是影响田间作物生产的一个常见因素，而病原体入侵是另一个严重的问题。在这里，我们报告说，缺磷棉花植株对黄萎病菌表现出增强的抗性。转录组和组织化学分析表明，棉花苯丙烷途径在缺磷条件下被激活，包括木质素和类黄酮的生物合成。代谢组学数据显示，缺磷棉花积累了许多类黄酮代谢物，并在甲醇提取物方面表现出明显的抗真菌活性。此外，在缺磷条件下 JA 生物合成被激活，GhAOS 敲低植株中缺磷诱导的抗病性显著减弱。总之，我们的研究表明，缺磷通过激活苯丙烷途径和 JA 生物合成增强了棉花对黄萎病菌的抗性，为研究缺磷如何影响植物抗病性提供了新的见解。
