Wheat Thioredoxin (TaTrxh1) Associates With RD19-Like Cysteine Protease TaCP1 to Defend Against Stripe Rust Fungus Through Modulation of Programmed Cell Death
文献类型： 外文期刊
作者： Shi, Beibei 1 ; Zhao, Xinbei 1 ; Li, Min 1 ; Dong, Zihui 1 ; Yang, Qichao 1 ; Wang, Yang 1 ; Gao, Haifeng 4 ; Day, Brad 5 ;
作者机构： 1.Northwest A&F Univ, State Key Lab Crop Stress Biol Arid Areas, Yangling 712100, Shaanxi, Peoples R China
2.Northwest A&F Univ, Coll Plant Protect, Yangling 712100, Shaanxi, Peoples R China
3.Henan Acad Agr Sci, Inst Plant Protect, Key Lab IPM Pests Crop Southern North China, Minist Agr,Key Lab Crop Pest Control Henan, Zhengzhou 450002, Henan, Peoples R China
4.Xinjiang Acad Agr Sci, Inst Plant Protect, Key Lab Integrated Pest Management Crop Northwest, Minist Agr & Rural Affairs, Urumqi 830091, Xinjiang, Peoples R China
5.Michigan State Univ, Dept Plant Soil & Microbial Sci, E Lansing, MI 48824 USA
6.Michigan State Univ, Plant Resilience Inst, E Lansing, MI 48824 USA
关键词： thioredoxin; cysteine protease; wheat stripe rust; programmed cell death; salicylic acid
期刊名称：MOLECULAR PLANT-MICROBE INTERACTIONS （ 影响因子：3.696； 五年影响因子：4.282 ）
ISSN： 0894-0282
年卷期： 2021 年 34 卷 4 期
页码：
收录情况： SCI
摘要： Thioredoxins (Trxs) function within the antioxidant network through modulation of one or more redox reactions involved in oxidative-stress signaling. Given their function in regulating cellular redox, Trx proteins also fulfill key roles in plant immune signaling. Here, TaTrxh1, encoding a subgroup h member of the Trx family, was identified and cloned in wheat (Triticum aestivum), which was rapidly induced by Puccinia stritformis f. sp. tritici invasion and salicylic acid (SA) treatment. Overexpression of TaTrxh1 in tobacco (Nicotiana benthamiana) induced programmed cell death. Silencing of TaTrxh1 in wheat enhanced susceptibility to P. striifomzis f. sp. tritici in different aspects, including reactive oxygen species accumulation and pathogen-responsive or -related gene expression. Herein, we observed that the cellular concentration of SA was significantly reduced in TaTrxh1-silenced plants, indicating that TaTrxh1 possibly regulates wheat resistance to stripe rust through a SA-associated defense signaling pathway. Using a yeast two-hybrid screen to identify TaTrxh1-interacting partners, we further show that interaction with TaCP1 (a RD19-like cysteine protease) and subsequent silencing of TaCP1 reduced wheat resistance to P stritformis f. sp. tritici. hi total, the data presented herein demonstrate that TaTrxh1 enhances wheat resistance against P. stritformis f. sp. tritici via SA-dependent resistance signaling and that TaTrxh1 interaction with TaCP1 is required for wheat resistance to stripe rust.
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