文献类型： 外文期刊

作者： Xiong, J. ¹ ; He, R. ¹ ; Yang, F. ¹ ; Zou, L. ² ; Yi, K. ⁵ ; Lin, H. ¹ ; Zhang, D. ¹ ;

作者机构： 1.Sichuan Univ, Coll Life Sci, Key Lab Bioresource & Ecoenvironm, Minist Educ, Chengdu 610065, Sichuan, Peoples R China

2.China West Normal Univ, Key Lab Southwest China Wildlife Resources Conser, Minist Educ, Nanchong, Sichuan, Peoples R China

3.Mianyang Normal Univ, Ecol Secur & Protect Key Lab Sichuan Prov, Mianyang, Sichuan, Peoples R China

4.Mianyang Normal Univ, Life Sci & Technol Coll, Mianyang, Sichuan, Peoples R China

5.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou, Hainan, Peoples R China

关键词： ethylene; brassinosteroids; plant immunity; Pst DC3000; Nicotiana benthamiana

期刊名称：PLANT BIOLOGY （ 影响因子：3.081； 五年影响因子：2.972 ）

ISSN： 1435-8603

年卷期： 2020 年 22 卷 2 期

页码：

收录情况： SCI

摘要： Plant immunity is regulated by a huge phytohormone regulation network. Ethylene(ET) and brassinosteroids (BRs) play critical roles in plant response to biotic stress; however, the relationship between BR and ET in plant immunity is unclear. We used chemical treatments, genetic approaches and inoculation experiments to investigate the relationship between ET and BR in plant defense against Pst DC3000 in Nicotiana benthamiana. Foliar applications of ET and BR enhanced plant resistance to Pst DC3000 inoculation, while treatment with brassinazole (BRZ, a specific BR biosynthesis inhibitor) eliminated the ET induced plant resistance to Pst DC3000. Silencing of DWARF 4(DWF4, a key BR biosynthetic gene), BRASSINOSTEROID INSENSITIVE 1 (BRI1, aBR receptor) and BRASSINOSTEROID-SIGNALING KINASE 1 (BSK1, downstream of BRI1) also neutralised the ET-induced plant resistance to Pst DC3000. ET can induce callose deposition and reactive oxygen species (ROS) accumulation to resistPst DC3000, BRZ-treated and gene-silenced were completely eliminate this response. Our results suggest BR is involved in ET-induced plant resistance, the involvement of ET in plant resistance is possibly by the induction of callose deposition and ROS accumulation, in a BR-dependent manner.