Exogenous CaCl2 reduces salt stress in sour jujube by reducing Na+ and increasing K+, Ca2+, and Mg2+ in different plant organs

Exogenous CaCl₂ reduces salt stress in sour jujube by reducing Na⁺ and increasing K⁺, Ca²⁺, and Mg²⁺ in different plant organs

文章信息：

Jin, J., Cui, H., Lv, X., Yang, Y., Wang, Y., & Lu, X. (2016). Exogenous CaCl₂ reduces salt stress in sour jujube by reducing na+ and increasing k+, ca2+, and mg2+ in different plant organs. The Journal of Horticultural Science and Biotechnology, 92(1): 98-106.

类型：研究论文

通讯作者：鲁晓燕
DOI: http://dx.doi.org/10.1080/14620316.2016.1228435       

摘要：

In this study, we investigated the effects of 10 mM CaCl₂ on membrane permeability, malondialdehyde (MDA), reactive oxygen species (ROS), and Na⁺, K⁺, Ca²⁺, and Mg²⁺ concentrations in different organs of sour jujube grown under 150 mM NaCl stress. Our results showed 73% leaf wilting in the Na treatment. The Na treatment significantly increased leaf superoxide (O₂^.‒) production rates, hydrogen peroxide (H₂O₂) concentrations, cell membrane permeability, MDA concentrations, and Na⁺ concentrations in roots, stems, and leaves. The Na treatment significantly reduced K⁺, Ca²⁺,and Mg²⁺ concentrations in roots, but increased K+ concentrations in stems. Compared with the Na treatment, 39% of the leaves showed wilting symptoms in the Na+Ca treatment. The Na+Ca treatment significantly decreased leaf O₂.‒ production rates, H2O2 concentrations, cell membrane permeability, and MDA concentrations. Moreover, the Na+Ca treatment (1) significantly reduced Na⁺ concentrations in roots, stems, and leaves; (2) significantly increased root K⁺ concentrations; (3) significantly increased K⁺/Na⁺ ratios in roots; (4) significantly increased Ca²⁺ concentrations in stems and leaves, and Mg²⁺ concentrations in roots. In conclusion, exogenous CaCl₂ reduces NaCl stress in sour jujube by reducing Na+ concentrations and increasing K⁺, Ca²⁺, and Mg²⁺ concentrations in various plant organs.

链接：http://www.tandfonline.com/doi/abs/10.1080/14620316.2016.1228435