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The Brassicaceae-specific secreted peptides, STMPs, function in plant growth and pathogen defense

文献类型： 外文期刊

作者： Yu, Zipeng 1 ; Xu, Yang 1 ; Zhu, Lifei 1 ; Zhang, Lei 1 ; Liu, Lin 1 ; Zhang, Di 1 ; Li, Dandan 1 ; Wu, Changai 1 ; Huang, J 1 ;

作者机构： 1.Shandong Agr Univ, State Key Lab Crop Biol, Tai An 271018, Shandong, Peoples R China

2.Shandong Acad Agr Sci, Shandong Peanut Res Inst, Qingdao 266100, Shandong, Peoples R China

期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 影响因子：7.061； 五年影响因子：6.002 ）

ISSN： 1672-9072

年卷期：

页码：

收录情况： SCI

摘要： Low molecular weight secreted peptides have recently been shown to affect multiple aspects of plant growth, development, and defense responses. Here, we performed stepwise BLAST filtering to identify unannotated peptides from the Arabidopsis thaliana protein database and uncovered a novel secreted peptide family, secreted transmembrane peptides (STMPs). These low molecular weight peptides, which consist of an N-terminal signal peptide and a transmembrane domain, were primarily localized to extracellular compartments but were also detected in the endomembrane system of the secretory pathway, including the endoplasmic reticulum and Golgi. Comprehensive bioinformatics analysis identified 10 STMP family members that are specific to the Brassicaceae family. Brassicaceae plants showed dramatically inhibited root growth upon exposure to chemically synthesized STMP1 and STMP2. Arabidopsis overexpressing STMP1, 2, 4, 6, or 10 exhibited severely arrested growth, suggesting that STMPs are involved in regulating plant growth and development. In addition, in vitro bioassays demonstrated that STMP1, STMP2, and STMP10 have antibacterial effects against Pseudomonas syringae pv. tomato DC3000, Ralstonia solanacearum, Bacillus subtilis, and Agrobacterium tumefaciens, demonstrating that STMPs are antimicrobial peptides. These findings suggest that STMP family members play important roles in various developmental events and pathogen defense responses in Brassicaceae plants.

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