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<p>The <i>TCP</i> family members encode plant-specific transcription factors forming bHLH structure binding to the promoter region of various genes involved in abscisic acid signaling essential for stomatal closure during drought stress conditions. Sugarcane is an economically valuable crop that serves as a main source of raw materials for food and biofuel industries. In this study, a genome-wide analysis of the <i>TCP</i> gene family in the sugarcane genome was conducted, identifying 57 <i>ShTCP</i> genes. These genes are evenly distributed across the chromosomes in the <i>Saccharum</i> hybrid genome and classified into two classes, Class I and Class II, based on their amino acid composition. Structural organization of <i>ShTCPs</i> revealed that among 57 <i>ShTCP</i>s, 55 <i>ShTCP</i> members are without intron and the remaining 2 <i>ShTCPs</i> namely <i>ShTCP27</i> and <i>ShTCP18</i> contain introns in the coding region. Phylogenetic tree analysis of <i>TCP</i>s with other monocot species revealed that the <i>TCP</i> family segregates into two subfamilies: Class I (TCP-P) and Class II (TCP-C). Collinearity analysis of <i>ShTCP</i> genes identified 16 pairs of duplicated chromosomes within the <i>Saccharum</i> complex, which represents segmental duplication. Expression profiling of 5 <i>ShTCP</i> (<i>TCP1</i>, <i>TCP7</i>, <i>TCP14</i>, <i>TCP19</i>, and <i>TCP27</i>) genes in <i>Saccharum</i> hybrid cultivar and it’s wild relative <i>Erianthus arundinaceus</i> under water deficit conditions revealed that <i>E. arundinaceus</i> showed elevated expression levels in leaf tissues. Among various stresses affecting sugarcane production, water deficit stress is the most significant constraint thus efforts to utilize the <i>TCP</i> gene could serve as a potential candidate towards the development of drought-tolerant varieties.</p>

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Isolation, Genome-Wide Identification and Expression Profiling of CYC/TB1 Like Transcription Factor from Saccharum Complex Under Water Deficit Stress Condition

  • 期刊论文

  • 发表日期：

    2025年1月30日

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  • S. R. Harish Chandar,
  • Subramanian Mahalakshmi,
  • Murugavelu Girija Sangari,
  • Janarthanan Aparna,
  • Palanisamy Shanmugapriya,
  • Ramanathan Valarmathi,
  • Chinnaswamy Appunu

摘要

The TCP family members encode plant-specific transcription factors forming bHLH structure binding to the promoter region of various genes involved in abscisic acid signaling essential for stomatal closure during drought stress conditions. Sugarcane is an economically valuable crop that serves as a main source of raw materials for food and biofuel industries. In this study, a genome-wide analysis of the TCP gene family in the sugarcane genome was conducted, identifying 57 ShTCP genes. These genes are evenly distributed across the chromosomes in the Saccharum hybrid genome and classified into two classes, Class I and Class II, based on their amino acid composition. Structural organization of ShTCPs revealed that among 57 ShTCPs, 55 ShTCP members are without intron and the remaining 2 ShTCPs namely ShTCP27 and ShTCP18 contain introns in the coding region. Phylogenetic tree analysis of TCPs with other monocot species revealed that the TCP family segregates into two subfamilies: Class I (TCP-P) and Class II (TCP-C). Collinearity analysis of ShTCP genes identified 16 pairs of duplicated chromosomes within the Saccharum complex, which represents segmental duplication. Expression profiling of 5 ShTCP (TCP1, TCP7, TCP14, TCP19, and TCP27) genes in Saccharum hybrid cultivar and it’s wild relative Erianthus arundinaceus under water deficit conditions revealed that E. arundinaceus showed elevated expression levels in leaf tissues. Among various stresses affecting sugarcane production, water deficit stress is the most significant constraint thus efforts to utilize the TCP gene could serve as a potential candidate towards the development of drought-tolerant varieties.