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TaCAP1 Interacts with TaLHCB1s and Positively Regulates Wheat Resistance Against Stripe Rust

文献类型： 外文期刊

作者： Shi, Beibei 1 ; Lian, Qinggui 3 ; Gao, Haifeng 4 ; Wang, Yang 1 ; Ma, Qing 1 ;

作者机构： 1.Northwest A&F Univ, Coll Plant Protect, State Key Lab Crop Stress Biol Arid Areas, Yangling 712100, Shaanxi, Peoples R China

2.Yanan Univ, Coll Life Sci, Shaanxi Key Lab Chinese Jujube, Yanan 716000, Shaanxi, Peoples R China

3.Shihezi Univ, Coll Agr, Shihezi 832003, Xinjiang, Peoples R China

4.Xinjiang Acad Agr Sci, Inst Plant Protect, Key Lab Integrated Pest Management Crop Northweste, Minist Agr & Rural Affairs, Urumqi 830091, Xinjiang, Peoples R China

关键词： cyclase-associated protein 1; light-harvesting complex II proteins; Puccinia striiformis f. sp. tritici; wheat

期刊名称：PHYTOPATHOLOGY （ 影响因子：2.6； 五年影响因子：3.3 ）

ISSN： 0031-949X

年卷期： 2024 年 114 卷 7 期

页码：

收录情况： SCI

摘要： Actin filaments and their associated actin-binding proteins play key roles in plant innate immune signaling. CAP1, or cyclase-associated protein 1, is an important regulatory factor of the actin cytoskeleton-associated signaling network and was hypothesized here to be involved in resistance against wheat stripe rust because TaCAP1 expression was upregulated in response to Puccinia striiformis f. sp. tritici (Pst). Downregulation of TaCAP1 expression led to decreased resistance against Pst, in contrast to increased resistance upon TaCAP1 overexpressing, as demonstrated by the changes of phenotypes and hyphal growth. We found increased expression of pathogenesis-responsive or relative related genes and disease grade changed in TaCAP1 overexpressing plants. Our results also showed TaCAP1-regulated host resistance to Pst by inducing the production and accumulation of reactive oxygen species and mediating the salicylic acid signaling pathway. Additionally, TaCAP1 interacted with chlorophyll a/b-binding proteins TaLHCB1.3 and TaLHCB1.4, also known as the light-harvesting chlorophyll-protein complex II subunit B, which belong to the light-harvesting complex II protein family. Silencing of two TaLHCB1 genes showed higher susceptibility to Pst, which reduced wheat resistance against Pst. Therefore, the data presented herein further illuminate our understanding that TaCAP1 interacts with TaLHCB1s and functions as a positive regulator of wheat resistance against stripe rust.

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