The origin and evolution of salicylic acid signaling and biosynthesis in plants

编号 040037903

推送时间 20230123

研究领域 森林培育 

年份 2022 

类型 期刊 

语种 英语

标题 The origin and evolution of salicylic acid signaling and biosynthesis in plants

来源期刊 Molecular plant

期 第379期

发表时间 20221206

关键词 High irradiance;  Plant evolution;  SA biosynthesis;  SA signaling;  Salicylic acid.; 

摘要 Salicylic acid (SA) plays a pivotal role in plant response to biotic and abiotic stress. Several core SA signaling regulators and key proteins in SA biosynthesis have been well charactered. However, much remains unknown about the origin, evolution, and early diversification of core elements in plant SA signaling and biosynthesis. Here, we identified ten core protein families in SA signaling and biosynthesis across green plant lineages. We found that key SA signaling receptors, the nonexpresser of pathogenesis-related proteins (NPRs), originated in the most recent common ancestor (MRCA) of land plants and formed divergent groups in the ancestor of seed plants. However, key transcription factors for SA signaling, TGACG motif-binding proteins (TGAs), originated in the MRCA of streptophytes, arguing for the stepwise evolution of core SA signaling in plants. Different from the assembling of core SA signaling in the ancestor of seed plants, SA extensively exists in green plants, including chlorophytes and streptophyte algae. However, the full isochorismate synthase (ICS)-based SA synthesis pathway was first assembled in the MRCA of land plants. We further uncovered that the ancient abnormal inflorescence meristem 1 (AIM1)-based β-oxidation is crucial for the biosynthesis of SA in Chlorophyte algae, and this biosynthesis pathway may have facilitated the adaptation of early-diverging green algae for the high light intensity environment on land. Taken together, our findings provide significant insights into the early evolution and diversification of plant SA signaling and biosynthesis pathways, and highlight the role of SA in stress tolerance during plant terrestrialization.

服务人员 孙小满

服务院士 尹伟伦

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