Identification and Expression Profiling of TGA Transcription Factor Genes in Sugarcane Reveals the Roles in Response to Sporisorium scitamineum Infection

Zhengying Luo, Xin Hu, Zhuandi Wu, Xinlong Liu, Caiwen Wu () and Qianchun Zeng ()
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Zhengying Luo: College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming 650201, China
Xin Hu: Yunnan Key Laboratory of Sugarcane Genetic Improvement, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Kaiyuan 661699, China
Zhuandi Wu: Yunnan Key Laboratory of Sugarcane Genetic Improvement, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Kaiyuan 661699, China
Xinlong Liu: Yunnan Key Laboratory of Sugarcane Genetic Improvement, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Kaiyuan 661699, China
Caiwen Wu: Yunnan Key Laboratory of Sugarcane Genetic Improvement, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Kaiyuan 661699, China
Qianchun Zeng: College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming 650201, China

Agriculture, 2022, vol. 12, issue 10, 1-15

Abstract: TGA transcription factor (TF) family genes play a major role in the regulation of plant growth and development as well as in the defense against pathogen attack. Little is known about the TGA family genes and their functions in sugarcane. Here, a total of 16 TGA members were identified in the sugarcane genome by bioinformatic approaches. All members exhibited similar conserved motifs and contained a bZIP domain and a DOG1 domain, except for ShTGA15/16 . Phylogenetic analysis demonstrated that 16 ShTGA family genes could be divided into eight clades, and evolved differently from Arabidopsis TGAs . All ShTGA family genes suffered a purifying selection during evolution. A wide range of cis-regulatory elements were found in the promoter of ShTGA genes including hormone regulatory elements, adversity response elements, light responsive elements, and growth and development regulatory elements. Most ShTGA expressions were increased in bud growth and developmental processes except for ShTGA10 /11 . It is worth noting that the expression of ShTGA13 was decreased after sugarcane was infected with Sporisorium scitamineum , and it was highly expressed in the resistant variety compared to the susceptible variety. Adding IAA, GA 3 and SA restored the expression of ShTGA13 , suggesting an association with plant hormone regulatory pathways. Our study provides a framework for further functional studies of important ShTGA genes in development and stress response, and uncovered a previously unrecognized role of ShTGA13 in regulating resistance against S. scitamineum .

Keywords: sugarcane; TGA transcription factor; gene expression; evolutionary analysis; Sporisorium scitamineum (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
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