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An effector protein of the wheat stripe rust fungus targets chloroplasts and suppresses chloroplast function

Author

Listed:
  • Qiang Xu

    (Northwest A&F University)

  • Chunlei Tang

    (Northwest A&F University)

  • Xiaodong Wang

    (Northwest A&F University)

  • Shutian Sun

    (Northwest A&F University)

  • Jinren Zhao

    (Northwest A&F University)

  • Zhensheng Kang

    (Northwest A&F University)

  • Xiaojie Wang

    (Northwest A&F University)

Abstract

Chloroplasts are important for photosynthesis and for plant immunity against microbial pathogens. Here we identify a haustorium-specific protein (Pst_12806) from the wheat stripe rust fungus, Puccinia striiformis f. sp. tritici (Pst), that is translocated into chloroplasts and affects chloroplast function. Transient expression of Pst_12806 inhibits BAX-induced cell death in tobacco plants and reduces Pseudomonas-induced hypersensitive response in wheat. It suppresses plant basal immunity by reducing callose deposition and the expression of defense-related genes. Pst_12806 is upregulated during infection, and its knockdown (by host-induced gene silencing) reduces Pst growth and development, likely due to increased ROS accumulation. Pst_12806 interacts with the C-terminal Rieske domain of the wheat TaISP protein (a putative component of the cytochrome b6-f complex). Expression of Pst_12806 in plants reduces electron transport rate, photosynthesis, and production of chloroplast-derived ROS. Silencing TaISP by virus-induced gene silencing in a susceptible wheat cultivar reduces fungal growth and uredinium development, suggesting an increase in resistance against Pst infection.

Suggested Citation

  • Qiang Xu & Chunlei Tang & Xiaodong Wang & Shutian Sun & Jinren Zhao & Zhensheng Kang & Xiaojie Wang, 2019. "An effector protein of the wheat stripe rust fungus targets chloroplasts and suppresses chloroplast function," Nature Communications, Nature, vol. 10(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-13487-6
    DOI: 10.1038/s41467-019-13487-6
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    Cited by:

    1. Mengmeng Li & Zige Yang & Cheng Chang, 2022. "Susceptibility Is New Resistance: Wheat Susceptibility Genes and Exploitation in Resistance Breeding," Agriculture, MDPI, vol. 12(9), pages 1-13, September.
    2. Rongrong Zhang & Yu Wu & Xiangru Qu & Wenjuan Yang & Qin Wu & Lin Huang & Qiantao Jiang & Jian Ma & Yazhou Zhang & Pengfei Qi & Guoyue Chen & Yunfeng Jiang & Youliang Zheng & Xiaojie Wang & Yuming Wei, 2024. "The RING-finger ubiquitin E3 ligase TaPIR1 targets TaHRP1 for degradation to suppress chloroplast function," Nature Communications, Nature, vol. 15(1), pages 1-17, December.

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