Systemic root-shoot signaling drives jasmonate-based root defense against nematodes

Research output: Contribution to journalArticlepeer-review

Authors

  • Guoting Wang
  • Chaoyi Hu
  • Jie Zhou
  • Ya Liu
  • Jiaxing Cai
  • Caizhe Pan
  • Yu Wang
  • Xiaodan Wu
  • Kai Shi
  • Xiaojian Xia
  • Yanhong Zhou
  • Jingquan Yu

Colleges, School and Institutes

External organisations

  • Zhejiang University
  • Agricultural Ministry of China
  • Hainan University

Abstract

Shoot-root communication is crucial for plant adaptation to environmental changes. However, the extensive crosstalk between shoots and roots that controls the synthesis of jasmonates (JAs), in order to enhance defense responses against rhizosphere herbivores, remains poorly understood. Here, we report that the root-knot nematode (RKN) Meloidogyne incognita induces the systemic transmission of electrical and reactive oxygen species (ROS) signals from attacked tomato roots to the leaves, leading to an increased accumulation of JAs in the leaves. Grafting of 1.0-cm stem sections from mutants lacking GLUTAMATE RECEPTOR-LIKE 3.5 or the mutants deficient in RESPIRATORY BURST OXIDASE HOMOLOG 1 abolished the RKN-induced electrical signals and associated ROS and JA accumulation in the upper stems and leaves with attenuated resistance to RKN. Furthermore, the absence of systemic transmission of electrical and ROS signals compromised the activation of mitogen-activated protein kinases (MPKs) 1/2 in leaves. Silencing MPK1 or MPK2 abolished RKN-induced accumulation of JAs and associated resistance. These findings reveal a systemic signaling loop that integrates electrical, ROS, and JA signals to enhance the resistance in distal organs via root-shoot-root communication.

Details

Original languageEnglish
Pages (from-to)3430-3438.e4
JournalCurrent Biology
Volume29
Issue number20
Early online date3 Oct 2019
Publication statusPublished - 21 Oct 2019

Keywords

  • electrical signaling, glutamate receptor, grafting, jasmonate, long distance signals, mitogen-activated protein kinases, nematode, reactive oxygen species, resistance, respiratory burst oxidase