2019
Under drought conditions NaCl improves the nutritional status of the xerophyte Zygophyllum xanthoxylum but not of the glycophyte Arabidopsis thaliana
Publication
Publication
Journal of Plant Nutrition and Soil Science
Zygophyllum xanthoxylum is a salt-accumulating xerophytic species with excellent adaptability to adverse environments. Previous studies demonstrated that Z. xanthoxylum absorbs a great quantity of Na + as an osmoregulatory substance under arid conditions. To investigate the nutritional status of Z. xanthoxylum in comparison with a typical glycophyte, Arabidopsis thaliana, seedlings were exposed to NaCl (50 mM for Z. xanthoxylum and 5 mM for A. thaliana), osmotic stress (–0.5 MPa), and osmotic stress combined with the NaCl treatment. Compared to the control, NaCl treatment or osmotic stress significantly increased Na + concentration in leaves and roots of Z. xanthoxylum, but not of A. thaliana. Under osmotic stress, the addition of NaCl significantly increased Na + concentration in leaves and roots of Z. xanthoxylum, resulting in improved biomass and tissue water content. However, such changes were not observed in A. thaliana. Compared to the control, K + concentrations in leaves and roots remained unchanged in Z. xanthoxylum when exposed to osmotic stress, with or without additional 50 mM NaCl. In contrast, significant reductions in shoot K + concentrations of A. thaliana were observed under osmotic stress alone or when combined with 5 mM NaCl. Moreover, NaCl alone or when combined with osmotic stress enhanced the accumulation of N, P, Fe, Si, Ca 2+ , and Mg 2+ in Z. xanthoxylum, but did not cause such nutritional changes in A. thaliana. Compared to the glycophyte A. thaliana, Z. xanthoxylum could accumulate Na + and maintain the stability of nutritional status at a relatively constant level to cope with drought stress.
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doi.org/10.1002/jpln.201800472 | |
Journal of Plant Nutrition and Soil Science | |
Organisation | Department of Biology |
Wang, W.-Y. (Wen-Ying), Chai, W.-W. (Wei-Wei), Zhao, C.-Y. (Chang-Yu), Rowland, O, Wang, B.-S. (Bao-Shan), Song, X. (Xin), … Wang, S.-M. (Suo-Min). (2019). Under drought conditions NaCl improves the nutritional status of the xerophyte Zygophyllum xanthoxylum but not of the glycophyte Arabidopsis thaliana. Journal of Plant Nutrition and Soil Science. doi:10.1002/jpln.201800472
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