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<p><i>Aux/IAA</i> is a phytohormone growth hormone gene that plays an important role in the growth and development of quinoa. In order to fully characterize the <i>Aux/IAA</i> gene family in quinoa, bioinformatics techniques were used to identify and analyze the <i>Aux/IAA</i> gene family in quinoa. In this study, a total of 39 <i>Aux/IAA</i> gene family members were identified in quinoa, divided into two major taxa and 10 subclasses, most of which are acidic hydrophilic proteins, with most of their subcellular structures localized in the nucleus and a few in the chloroplast, cytoplasm and mitochondria. Multiple CqIAA proteins contain typical AUX/IAA structural domains and differ in protein motif composition. Gene duplication analyses suggest that most <i>CqIAA</i> genes may undergo gene loss during tandem duplication.The 2000&#xa0;bp region of the <i>CqIAA</i> gene family promoter contains a variety of light, phytohormone, and stress-responsive cis-acting elements. Transcriptome data analysis showed that the expression of some <i>CqIAA</i> genes in rhizomes was tissue-specific, among which <i>AUR62001002</i>, <i>AUR62011942, AUR62011606,</i> and other genes played important roles under low-temperature stress. The results of this study lay the foundation for further analysis of the functional characteristics of the <i>Aux/IAA</i> gene family in the growth and development of quinoa, and for the subsequent validation of their functions.</p>

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Genome-Wide Identification of the Aux/IAA Gene Family in Quinoa and Analysis of its Expression Pattern Under Low-Temperature Stress

  • 期刊论文

  • 发表日期：

    2025年8月9日

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  • Huanyao Xia,
  • Jie Yang,
  • Yuming Xie,
  • Jianlong Zhou,
  • Lurongrong Gao,
  • Lingyuan Zhang,
  • Yutao Bai,
  • Xuqin Wang,
  • Guofei Jiang,
  • Hanxue Li,
  • Hui Zhang,
  • Peng Qin

摘要

Aux/IAA is a phytohormone growth hormone gene that plays an important role in the growth and development of quinoa. In order to fully characterize the Aux/IAA gene family in quinoa, bioinformatics techniques were used to identify and analyze the Aux/IAA gene family in quinoa. In this study, a total of 39 Aux/IAA gene family members were identified in quinoa, divided into two major taxa and 10 subclasses, most of which are acidic hydrophilic proteins, with most of their subcellular structures localized in the nucleus and a few in the chloroplast, cytoplasm and mitochondria. Multiple CqIAA proteins contain typical AUX/IAA structural domains and differ in protein motif composition. Gene duplication analyses suggest that most CqIAA genes may undergo gene loss during tandem duplication.The 2000 bp region of the CqIAA gene family promoter contains a variety of light, phytohormone, and stress-responsive cis-acting elements. Transcriptome data analysis showed that the expression of some CqIAA genes in rhizomes was tissue-specific, among which AUR62001002, AUR62011942, AUR62011606, and other genes played important roles under low-temperature stress. The results of this study lay the foundation for further analysis of the functional characteristics of the Aux/IAA gene family in the growth and development of quinoa, and for the subsequent validation of their functions.