烟草
生物
效应器
卵菌
细胞生物学
先天免疫系统
富含亮氨酸重复
免疫受体
免疫系统
遗传学
基因
激酶
作者
Haibin Jiang,Yeqiang Xia,Sicong Zhang,Zhichao Zhang,Hui Feng,Qi Zhang,Xi Chen,Jingfan Xiao,Sen Yang,Mengzhu Zeng,Zhaodan Chen,Hai-Bing Ouyang,Xiuli He,Guangzheng Sun,Jin‐Bin Wu,Suomeng Dong,Wenwu Ye,Zhenchuan Ma,Yan Wang,Yuanchao Wang
摘要
Summary The role of cysteine‐rich secretory proteins, antigen 5, and pathogenesis‐related 1 (CAP) superfamily proteins in the innate immune responses of mammals is well characterized. However, the biological function of CAP superfamily proteins in plant–microbe interactions is poorly understood. We used proteomics and transcriptome analyses to dissect the apoplastic effectors secreted by the oomycete Phytophthora sojae during early infection of soybean leaves. By transiently expressing these effectors in Nicotiana benthamiana , we identified PsCAP1, a novel type of secreted CAP protein that triggers immune responses in multiple solanaceous plants including N. benthamiana . This secreted CAP protein is conserved among oomycetes, and multiple PsCAP1 homologs can be recognized by N. benthamiana . PsCAP1‐triggered immune responses depend on the N‐terminal immunogenic fragment (aa 27–151). Pretreatment of N. benthamiana with PsCAP1 or the immunogenic fragment increases plant resistance against Phytophthora . The recognition of PsCAP1 and different homologs requires the leucine‐rich repeat receptor‐like protein RCAP1, which associates with two central receptor‐like kinases BRI1‐associated receptor kinase 1 (BAK1) and suppressor of BIR1‐1 (SOBIR1) in planta . These findings suggest that the CAP‐type apoplastic effectors act as an important player in plant–microbe interactions that can be perceived by plant membrane‐localized receptor to activate plant resistance.
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