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

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  • Zhengying Luo

    (College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming 650201, China
    Yunnan Key Laboratory of Sugarcane Genetic Improvement, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Kaiyuan 661699, 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)

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 .

Suggested Citation

  • Zhengying Luo & Xin Hu & Zhuandi Wu & Xinlong Liu & Caiwen Wu & Qianchun Zeng, 2022. "Identification and Expression Profiling of TGA Transcription Factor Genes in Sugarcane Reveals the Roles in Response to Sporisorium scitamineum Infection," Agriculture, MDPI, vol. 12(10), pages 1-15, October.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:10:p:1644-:d:936626
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    1. Shivesh Kumar & Raul Zavaliev & Qinglin Wu & Ye Zhou & Jie Cheng & Lucas Dillard & Jordan Powers & John Withers & Jinshi Zhao & Ziqiang Guan & Mario J. Borgnia & Alberto Bartesaghi & Xinnian Dong & Pe, 2022. "Structural basis of NPR1 in activating plant immunity," Nature, Nature, vol. 605(7910), pages 561-566, May.
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