Open AccessPotassium-induced plant resistance against soybean cyst nematode via root exudation of phenolic acids and plant pathogen-related genes
Author(s) -
Xiang Gao,
Shuxiang Zhang,
Xia Zhao,
Qingmin Wu
Publication year - 2018
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0200903
Subject(s) - heterodera , soybean cyst nematode , phenylalanine ammonia lyase , plant disease resistance , cinnamic acid , polyphenol oxidase , biology , salicylic acid , agronomy , nematode , chemistry , phenylalanine , horticulture , botany , biochemistry , gene , cultivar , enzyme , amino acid , peroxidase , ecology
Soybean cyst nematode (SCN) is a severe soil borne disease. The control of this disease is still a worldwide problem in agriculture. In this study, we found that application of potassium (K) fertilizer could decrease the occurrence of SCN at two field sites. Furthermore, the application of K could suppress Heterodera glycines with the activation of Phenylalanine Ammonia Lyase ( PAL) and Polyphenol Oxidase ( PPO) expression via pot experiments in a greenhouse. The release of cinnamic, ferulic and salicylic acids was significantly enhanced by K application of 3 mM, and each of three acids can dramatically constrain Heterodera glycines in vitro. This research indicated that K induce multiple mechanisms to improve the resistance of soybean against SCN and provide a new strategy to control SCN in fields with nutrient application.