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Position: Home > Articles > Potassium sulphate induces resistance of rice against the root- knot nematode Meloidogyne graminicola Journal of Integrative Agriculture 2022,21 (11)

Potassium sulphate induces resistance of rice against the root- knot nematode Meloidogyne graminicola

作者：

Mao-Yan, Liu;De-Liang, Peng;Wen, Su;Chao, Xiang;Jin-Zhuo, Jian;Jie, Zhao;Huan, Peng;Shi-Ming, Liu;Ling-An, Kong;Liang-Ying, Dai;Wen-Kun, Huang;Jing, Liu

单位：

Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China;Xichang Univ, Sch Agr Sci, Xichang 615013, Peoples R China;Hunan Agr Univ, Coll Plant Protect, Key Lab Biol & Control Plant Dis & Insect Pests, Changsha 410128, Peoples R China

关键词：

rice;Meloidogyne graminicola;potassium sulphate;induced resistance;callose;potassium channel and transporter

摘要：

Potassium (K), an important nutrient element, can improve the stress resistance/tolerance of crops. The application of K in resisting plant-parasitic nematodes shows that the K treatment can reduce the occurrence of nematode diseases and increase crop yield. However, data on K2SO4 induced rice resistance against the root-knot nematode Meloidogyne graminicola are still lacking. In this work, K2SO4 treatment reduced galls and nematodes in rice plants and delayed the development of nematodes. Rather than affecting the attractiveness of roots to nematodes and the morphological phenotype of giant cells at feeding sites, such an effect is achieved by rapidly priming hydrogen peroxide (H2O2) accumulation and increasing callose deposition. Meanwhile, galls and nematodes in rice roots were more in the potassium channel OsAKT1 and transporter OsHAK5 gene-deficient plants than in wild-type, while the K2SO4-induced resistance showed weaker in the defective plants. In addition, during the process of nematode infection, the expression of jasmonic acid (JA)/ethylene (ET)/brassinolide (BR) signaling pathway-related genes and pathogenesis-related (PR) genes OsPR1a/OsPR1b was up-regulated in rice after K2SO4 treatment. In conclusion, K2SO4 induced rice resistance against M. graminicola. The mechanism of inducing resistance was to prime the basal defense and required the participation of the K+ channel and transporter in rice. These laid a foundation for further study on the mechanism of rice defense against nematodes and the rational use of potassium fertilizer on improving rice resistance against nematodes in the field.

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Potassium sulphate induces resistance of rice against the root- knot nematode Meloidogyne graminicola

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