PBS3: a versatile player in and beyond salicylic acid biosynthesis in Arabidopsis

编号 040037105

推送时间 20221128

研究领域 森林培育 

年份 2022 

类型 期刊 

语种 英语

标题 PBS3: a versatile player in and beyond salicylic acid biosynthesis in Arabidopsis

来源期刊 The New phytologist

期 第371期

发表时间 20221020

关键词 Arabidopsis;  PBS3;  salicylic acid;  plant immunity;  abiotic stress;  flowering
time; 

摘要 AVRPPHB SUSCEPTIBLE 3 (PBS3) belongs to the GH3 family of acyl acid amido synthetases, which conjugates amino acids to diverse acyl acid substrates. Recent studies demonstrate that PBS3 in Arabidopsis plays a key role in the biosynthesis of plant defense hormone salicylic acid (SA) by catalyzing the conjugation of glutamate to isochorismate to form isochorismate-9-glutamate, which is then used to produce SA through spontaneous decay or ENHANCED PSEUDOMONAS SUSCEPTIBILITY (EPS1) catalysis. Consistent with its function as an essential enzyme for SA biosynthesis, PBS3 is well known to be a positive regulator of plant immunity in Arabidopsis. PBS3 is also involved in the trade-off between abiotic and biotic stress responses in Arabidopsis by suppressing the inhibitory effect of abscisic acid (ABA) on SA-mediated plant immunity. Besides stress responses, PBS3 also plays a role in plant development. Under long-day conditions, PBS3 influences Arabidopsis flowering time by regulating the expression of flowering regulators FLOWERING LOCUS C (FLC) and FLOWERING LOCUS T (FT). Taken together, PBS3 functions in the signaling network of plant development and responses to biotic and/or abiotic stresses, but the molecular mechanisms underlying its diverse roles remain obscure.

服务人员 孙小满

服务院士 尹伟伦

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