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<p>Nitrogen deficiency results in the yellowing of old leaves and premature senescence, ultimately leading to crop yield limitations. In this study, we overexpressed phospho<i>enol</i>pyruvate carboxykinase 2 (<i>PCK2</i>) from maize in rice (OE) and observed that OE outperformed the wild type under low nitrogen stress conditions, with relatively higher biomass and photosynthetic pigment contents compared with the wild type. Additionally, OE enhances nitrogen absorption and assimilation. Therefore, the photosynthesis is enhanced and the sensitivity to changes in carbon-nitrogen balance is reduced compared with the wide type. Overall, the over-expression of <i>ZmPCK2</i> in rice could enhance its tolerance to low nitrogen stress.</p>

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Overexpressed phosphoenolpyruvate carboxykinase 2 (PCK2) from maize in rice enhances tolerance to low nitrogen stress

  • 期刊论文

  • 发表日期：

    2025年1月3日

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  • Hui Xu,
  • Haizi Zhang,
  • Yue Xu,
  • Chengke Li,
  • Xiaowan Liu,
  • Tong Wu,
  • Linhao Zong,
  • Dexing Jiang,
  • Guoxiang Chen,
  • Zhiping Gao

摘要

Nitrogen deficiency results in the yellowing of old leaves and premature senescence, ultimately leading to crop yield limitations. In this study, we overexpressed phosphoenolpyruvate carboxykinase 2 (PCK2) from maize in rice (OE) and observed that OE outperformed the wild type under low nitrogen stress conditions, with relatively higher biomass and photosynthetic pigment contents compared with the wild type. Additionally, OE enhances nitrogen absorption and assimilation. Therefore, the photosynthesis is enhanced and the sensitivity to changes in carbon-nitrogen balance is reduced compared with the wide type. Overall, the over-expression of ZmPCK2 in rice could enhance its tolerance to low nitrogen stress.