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<p>Thaumatin is a group of proteins widely found in plants and has been shown to play a role in various stress responses. A study has identified a thaumatin-like protein called NN24 from the halophyte plant <i>Salicornia europaea</i> that conferred an extraordinary salt tolerance in yeast cells (Nakahara et al. in Frontiers in Plant Science 6: 920, 2015). We introduced and expressed a condon-optimized sequence of this <i>SeNN24</i> gene in tobacco plants and tested their responses to salt stress. We found that <i>SeNN24</i>-expressing plants showed increased salt tolerance in both leaf tissue assays and in plant growth, compared to the untransformed wild type plants. Ectopic effect of <i>SeNN24</i> expression was also observed in the activities of endogenous genes involved in improved tolerance to oxidative stress associated with high salt treatment. Overall, our studies demonstrated the potential of leveraging genes from natural halophyte plants like <i>S. europaea</i> for genetically engineering salt tolerance in crop plants that could better deal with environmental challenges.</p>

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Ectopic expression of a thaumatin-like gene from the halophyte plant Salicornia europaea enhances salt tolerance in glycophyte plants

  • 期刊论文

  • 发表日期：

    2025年5月22日

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  • Lij Wynter,
  • Alysa Suissa,
  • Mia Michnik,
  • Liah Brussolo Cremona,
  • Xiao-Lu Jin,
  • Xing-Hai Zhang

摘要

Thaumatin is a group of proteins widely found in plants and has been shown to play a role in various stress responses. A study has identified a thaumatin-like protein called NN24 from the halophyte plant Salicornia europaea that conferred an extraordinary salt tolerance in yeast cells (Nakahara et al. in Frontiers in Plant Science 6: 920, 2015). We introduced and expressed a condon-optimized sequence of this SeNN24 gene in tobacco plants and tested their responses to salt stress. We found that SeNN24-expressing plants showed increased salt tolerance in both leaf tissue assays and in plant growth, compared to the untransformed wild type plants. Ectopic effect of SeNN24 expression was also observed in the activities of endogenous genes involved in improved tolerance to oxidative stress associated with high salt treatment. Overall, our studies demonstrated the potential of leveraging genes from natural halophyte plants like S. europaea for genetically engineering salt tolerance in crop plants that could better deal with environmental challenges.