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Adequate potassium application enhances salt tolerance of moderate-halophyte Sophora alopecuroides

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  • D.D. Wei

    (State Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, Shandong, P.R. China
    State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, P.R. China)

  • D. Cheng

    (State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, P.R. China
    University of Chinese Academy of Sciences, Beijing, P.R. China)

  • W.B. Liu

    (Huimin Biological Technology Co., Ltd of Inner Mongolia, Alashan, P.R. China)

  • T. Liu

    (Huimin Biological Technology Co., Ltd of Inner Mongolia, Alashan, P.R. China)

  • X.H. Yang

    (State Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, Shandong, P.R. China)

  • Y.H. Zheng

    (State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, P.R. China)

Abstract

A sand-culture experiment was carried out to investigate the effects of exogenous K2CO3 on salt resistance of moderate-halophyte Sophora alopecuroides. Thirty-day-old seedlings of S. alopecuroides were treated by two levels of salinity (0 and 200 mmol/L NaCl) in combination with four levels of K2CO3 (0, 5, 10 and 15 mmol/L). Gas exchange, chlorophyll content, K+/Na+ ratio, relative electrical conductivity (REC) and antioxidant enzymes activities were monitored after 15-day treatments. The results showed that adequate K+ application effectively counteracted the adverse effects of salinity, in which gas exchange, K+/Na+ ratio and chlorophyll content significantly increased, while REC and antioxidant enzymes activities considerably decreased. The results suggest that adequate potassium application may effectively enhance plant photosynthetic capacity and reduce the oxidative stress in the salinity-stressed S. alopecuroides.

Suggested Citation

  • D.D. Wei & D. Cheng & W.B. Liu & T. Liu & X.H. Yang & Y.H. Zheng, 2015. "Adequate potassium application enhances salt tolerance of moderate-halophyte Sophora alopecuroides," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 61(8), pages 364-370.
    • Handle: RePEc:caa:jnlpse:v:61:y:2015:i:8:id:232-2015-pse
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    References listed on IDEAS

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    1. Grewal, Harsharn Singh, 2010. "Water uptake, water use efficiency, plant growth and ionic balance of wheat, barley, canola and chickpea plants on a sodic vertosol with variable subsoil NaCl salinity," Agricultural Water Management, Elsevier, vol. 97(1), pages 148-156, January.
    2. G.Q. Wu & L.N. Zhang & Y.Y. Wang, 2012. "Response of growth and antioxidant enzymes to osmotic stress in two different wheat (Triticum aestivum L.) cultivars seedlings," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 58(12), pages 534-539.
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