Natural 2-Amino-3-Methylhexanoic Acid as Plant Elicitor Inducing Resistance against Temperature Stress and Pathogen Attack

International Journal of Molecular Sciences

Ruiqi Zhang¹  Xiaorong Tao²  Hazem M. Kalaji³  Bernal E. Valverde⁴  He Wang⁴  Yanjing Guo⁴  Jing Wang⁴  Sheng Qiang⁴  Shiguo Chen⁴  Yaxin Zhang⁴  Jingjing Li⁴  Rui Li⁴  Qian Yang⁴  Lan Wang⁴ 

[1] College of Agronomy, JCIC-MCP, National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China;Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China;Department of Plant Physiology, Institute of Biology, Warsaw University of Life Sciences SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland;Weed Research Laboratory, College of Life Science, Nanjing Agricultural University, Nanjing 210095, China;

关键词: agricultural production;    natural product;    plant resistance inducer;    biopesticide;    biotic and abiotic stress;   

DOI  :  10.3390/ijms23105715

来源: DOAJ

【 摘 要 】

2-Amino-3-methylhexanoic acid (AMHA) was synthetized as a non-natural amino acid more than 70 years ago; however, its possible function as an inducer of plant resistance has not been reported. Plant resistance inducers, also known as plant elicitors, are becoming a novel and important development direction in crop protection and pest management. We found that free AMHA accumulated in the mycelia but not in fermentation broths of four fungal species, Magnaporthe oryzae and three Alternaria spp. We unequivocally confirmed that AMHA is a naturally occurring endogenous (2S, 3S)-α-amino acid, based on isolation, purification and structural analyses. Further experiments demonstrated that AMHA has potent activity-enhancing resistance against extreme temperature stresses in several plant species. It is also highly active against fungal, bacterial and viral diseases by inducing plant resistance. AMHA pretreatment strongly protected wheat against powdery mildew, Arabidopsis against Pseudomonas syringae DC3000 and tobacco against Tomato spotted wilt virus. AMHA exhibits a great potential to become a unique natural elicitor protecting plants against biotic and abiotic stresses.

【 授权许可】

Unknown