Chinese Bulletin of Botany ›› 2023, Vol. 58 ›› Issue (5): 770-782.DOI: 10.11983/CBB22263

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Research Advances in Biological Functions of GH3 Gene Family in Plants

Yuan Yuan1, Enhebayaer1,*(), Qi Yanhua1,2,*()   

  1. 1. College of Life Sciences and Technology, Inner Mongolia Normal University, Hohhot 010022, China
    2. Inner Mongolia Key Laboratory of Herbage & Endemic Crop Biotechnology, Key Laboratory of Herbage & Endemic Crop Biology of Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot 010000, China

Abstract: The amide-synthase encoded by the auxin early response gene GH3 in plants could catalyze the combination of auxin, jasmonic acid and benzoic acid derivatives with amino acids respectively to form the corresponding amino acid complex. Under the high auxin concentration in plants, GH3 protein catalyzes the combination of auxin and amino acid, which acts as the auxin sink in plants. Under the low auxin concentration, the auxin-amino acid complex is hydrolyzed to auxin by proteolytic enzymes and re-participates in the auxin signaling pathway, thus regulating the dynamic balance of auxin levels in plants. When plants are subjected to biological or abiotic stress, GH3 protein catalyzes jasmonic acid and salicylic acid to bind to amino acids and participate in plant stress response. In this study, we summarized the research progress of GH3 gene in dicotyledonous model plant Arabidopsis thaliana, monocotyledonous model plant rice, and the other plants from the aspects of GH3 protein structure, GH3 gene family classification and its function, and provided some references for further study of GH3 gene family in plants.

Key words: GH3 gene, auxin, jasmonic acid, salicylic acid, stress response