PAMP-responsive ATL gene StRFP1 and its orthologue NbATL60 positively regulate Phytophthora infestans resistance in potato and Nicotiana benthamiana.
PAMP-responsive ATL gene StRFP1 and its orthologue NbATL60 positively regulate Phytophthora infestans resistance in potato and Nicotiana benthamiana.
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PAMP 反应性 ATL 基因 StRFP1 及其直系同源物 NbATL60 正向调节马铃薯和本塞姆氏烟草中的致病疫霉 (Phytophthora infestans) 抗性。
DOI:
10.1016/j.plantsci.2018.01.016
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发表时间:
2018-05
期刊:
影响因子:
5.2
通讯作者:
Tian Zhendong
中科院分区:
文献类型:
--
作者:
Zhong Cheng;Ren Yajuan;Qi Yetong;Yu Xiaoling;Wu Xintong;Tian Zhendong
Ubiquitination is a post-translational modification that plays a crucial role during the regulation of plant immune signalling. The plantATLfamily consists of a large number of putative RING type ubiquitin ligases. We show that potatoATLfamily geneStRFP1and its orthologueNbATL60fromN. benthamianaboth respond toPhytophthora infestansculture filtrate (CF) and flg22 induction.StRFP1positively regulates immunity againstP. infestansin potato. Ectopic transient expression ofStRFP1or expression ofNbATL60inN. benthamianaalso enhances late blight resistance. By contrast, silencingNbATL60inN. benthamianareduces late blight resistance and leads to plant growth inhibition. Both StRFP1 and NbATL60 localize to the plasma membrane and intracellular puncta and possess E3 Ligase activityin vitro.Furthermore we demonstrate that the RING finger domain mutants of StRFP1 and NbATL60 lost E3 ligase activity and fail to suppressP. infestanscolonization inN. benthamiana, indicating that E3 ligase activity is critical for StRFP1 and NbATL60 to regulate immunity. Overexpression or RNA interference ofStRFP1in transgenic potato led to increased or decreased expression of PTI maker genes (WRKY7,WRKY8,ACRE31andPti5) respectively. Similarly silencing ofNbATL60inN. benthamianadecreases expression of these PTI marker genes. Moreover, VIGS ofNbATL60inN. benthamianadid not compromiseP. infestansPAMP INF1 or R2/Avr2, R3a/AVR3a, Rx/Cp and Pto/AvrPto triggered cell death. These results indicate that ATL genesStRFP1andNbATL60contribute to basal immunity (PTI) inSolanaceousplants.
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