Potassium-induced plant resistance against soybean cyst nematode via root exudation of phenolic acids and plant pathogen-related genes | Zendy

Xiang Gao | Zendy; Shuxiang Zhang | Zendy; Xiujuan Zhao | Zendy; Qihua Wu | Zendy

Open Access

Potassium-induced plant resistance against soybean cyst nematode via root exudation of phenolic acids and plant pathogen-related genes

Author(s) -

Xiang Gao,

Shuxiang Zhang,

Xiujuan Zhao,

Qihua 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 , cinnamic acid , polyphenol oxidase , biology , plant disease resistance , salicylic acid , agronomy , nematode , phenylalanine , chemistry , botany , biochemistry , enzyme , cultivar , gene , 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.

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