Low Temperature Enhances Plant Immunity via Salicylic Acid Pathway Genes That Are Repressed by Ethylene
文献类型： 外文期刊
作者： Li, Zhan 1 ; Liu, Huimin 3 ; Ding, Zehong 4 ; Yan, Jiapei 2 ; Yu, Huiyun 2 ; Pan, Ronghui 1 ; Hu, Jin 1 ; Guan, Yajing 1 ; H 1 ;
作者机构： 1.Zhejiang Univ, Coll Agr & Biotechnol, Seed Sci Ctr, Inst Crop Sci, Hangzhou 310058, Peoples R China
2.Cornell Univ, Plant Biol Sect, Sch Integrat Plant Sci, Ithaca, NY 14853 USA
3.Nanjing Agr Univ, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Peoples R China
4.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Key Lab Biol & Genet Resources Trop Crops, Haikou 571101, Hainan, Peoples R China
期刊名称：PLANT PHYSIOLOGY （ 影响因子：8.34； 五年影响因子：8.972 ）
ISSN： 0032-0889
年卷期： 2020 年 182 卷 1 期
页码：
收录情况： SCI
摘要： Temperature has a large impact on plant immune responses. Earlier studies identified intracellular immune receptor nucleotide-binding leucine-rich repeat (NLR) genes and salicylic acid (SA) as targets of high-temperature inhibition of plant immunity. Here, we report that moderately low temperature enhances immunity to the bacterial pathogen Pseudomonas syringae in Arabidopsis (Arabidopsis thaliana). This enhancement is dependent on SA signaling and is accompanied by up-regulation of multiple SA biosynthesis and signaling genes at lower temperature. SA signaling is repressed by jasmonic acid and ethylene at both normal and low temperatures. The inhibition of SA biosynthesis by ethylene, while mainly through ISOCHORISMATE SYNTHASE1/SALICYLIC ACID-INDUCTION DEFICIENT2 (ICS1/SID2) at normal temperature, is through ENHANCED DISEASE SUSCEPTIBILITY5 (EDS5)/SID1, ICS2, and ICS1/SID2 at lower temperature. The repression by ethylene is mediated by a direct regulation of the ethylene response transcription factor ETHYLENE INSENSITIVE3 (EIN3) on multiple SA biosynthesis and signaling genes. Thus, low temperature enhances the SA pathway to promote immunity and at the same time uses ethylene to repress multiple SA regulators to achieve fine-tuned immune responses.
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