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<p>Plants cope with drought stress by strengthening their survival and growth capabilities through enhancing potassium absorption and utilization. In this study, we evaluate transgenic sweetpotato plants overexpressing potassium transport <i>IbHAK5</i> responses to drought stresses. Overexpression of <i>IbHAK5</i> can improve potassium ion (K<sup>+</sup>) absorption ability under normal condition and drought stress, which may result in the increased drought stress tolerant in transgenic plants. The transgenic plants displayed higher drought stress tolerant than wild-type plants by increasing relative water content (RWC) and alleviating oxidative stress. Transcriptome analysis further identified differentially expressed genes (DEGs) encoding aquaporins and screened K<sup>+</sup> channel, peroxidase (<i>POD</i>), glutathione S-transferase (<i>GST</i>), and stress-related genes up-regulated by drought stress, which may provide valuable insights for breeding programs to improve drought stress tolerance. These findings broaden our understanding of the role of <i>IbHAK5</i> in drought stress resistance, and provide some candidate genes for sweetpotato molecular breeding.</p>

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Overexpressing IbHAK5 increases drought stress tolerance in transgenic sweetpotato

  • 期刊论文

  • 发表日期：

    2025年2月28日

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  • Rong Jin,
  • Peng Zhao,
  • Qiangqiang Zhang,
  • Ming Liu,
  • Xiaoya Zhu,
  • Jing Wang,
  • Yongchao Yu,
  • Zhonghou Tang

摘要

Plants cope with drought stress by strengthening their survival and growth capabilities through enhancing potassium absorption and utilization. In this study, we evaluate transgenic sweetpotato plants overexpressing potassium transport IbHAK5 responses to drought stresses. Overexpression of IbHAK5 can improve potassium ion (K+) absorption ability under normal condition and drought stress, which may result in the increased drought stress tolerant in transgenic plants. The transgenic plants displayed higher drought stress tolerant than wild-type plants by increasing relative water content (RWC) and alleviating oxidative stress. Transcriptome analysis further identified differentially expressed genes (DEGs) encoding aquaporins and screened K+ channel, peroxidase (POD), glutathione S-transferase (GST), and stress-related genes up-regulated by drought stress, which may provide valuable insights for breeding programs to improve drought stress tolerance. These findings broaden our understanding of the role of IbHAK5 in drought stress resistance, and provide some candidate genes for sweetpotato molecular breeding.