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Effect of salt stress on growth and osmotic regulation in Thellungiella and Arabidopsis callus

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Abstract

The response of Thellungiella (Thellungiella holophila) and Arabidopsis (Arabidopsis thaliana) callus to salt stress was investigated. The relative growth rate of Arabidopsis calli decreased with increased levels of NaCl. However, the relative growth rate of Thellungiella calli increased with higher levels of NaCl, reaching maximal growth at 100 mM NaCl, but then subsequently declined. A similar pattern of accumulation of proline, glycine betaine, and total flavonoid was observed; whereas, accumulation of treholase continued to increase with increasing NaCl levels in both Thellungiella and Arabidopsis calli. Overall, with increasing NaCl levels, accumulation of glycine betaine, total flavonoid, and treholase was higher in Thellungiella than in Arabidopsis calli; while, proline and sucrose contents were higher in Arabidopsis than in Thellungiella calli. These results indicated that compatible solutes were involved in the response of plant calli to salt stress, and that the halophyte Thellungiella and glycophyte Arabidopsis selected different compatible solutes to adapt to salt stress environments.

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Acknowledgments

This work was supported by the National Science Foundation of China (30770343, 40825001) and the One Hundred Talent Project (O827751001) of CAS.

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Correspondence to X. Zhao.

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X. Zhao and H. J. Tan have contributed equally to the paper.

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Zhao, X., Tan, H.J., Liu, Y.B. et al. Effect of salt stress on growth and osmotic regulation in Thellungiella and Arabidopsis callus. Plant Cell Tiss Organ Cult 98, 97–103 (2009). https://doi.org/10.1007/s11240-009-9542-x

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  • DOI: https://doi.org/10.1007/s11240-009-9542-x

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