文献类型： 外文期刊
作者： Guo, Mengmeng 1 ; Li, Benjin 1 ; Xiang, Qin 1 ; Wang, Rongbo 1 ; Liu, Peiqing 1 ; Chen, Qinghe 1 ;
作者机构： 1.Fujian Acad Agr Sci, Fujian Key Lab Monitoring & Integrated Management, Inst Plant Protect, Fuzhou 350003, Peoples R China
2.Hainan Univ, Key Lab Green Prevent & Control Trop Plant Dis &, Minist Educ, Coll Plant Protect, Haikou 570228, Hainan, Peoples R China
关键词： Soybean; Phytophthora sojae; Phosphite; Translocation
期刊名称：PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY （ 影响因子：3.963； 五年影响因子：4.454 ）
ISSN： 0048-3575
年卷期： 2021 年 172 卷
页码：
收录情况： SCI
摘要： Although phosphite (Phi)-based fertilizers are used in large quantities in agriculture, the use of Phi-based fungicides against soybean root rot caused by Phytophthora sojae are limited. While, their low toxicity are of high ecological and economic focus. Limited attention has been paid to Phi translocation efficiency in soybeans and the efficacy of Phi as a fungicide against P. sojae. In this study, we evaluated the efficiency of Phi translocation in the Williams soybean cultivar by determining the Phi concentrations in roots, stems, and leaves using highperformance ion chromatography after the application of Phi to the roots. Phi was translocated from roots to leaves within 1 h and its concentration increased significantly in leaves within 36 h after Phi application. Results of an in vitro growth inhibition assay and an in vivo infection assay showed that Phi inhibited P. sojae. Additionally, we examined the activation of the salicylic acid (SA) and ethylene (ET) defense pathways by Phi. The expression of SA and ET pathway-related genes was upregulated in most soybean tissues after Phi application. Our results provide evidence that Phi translocation suppresses root rot caused by P. sojae in soybean.
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