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| Responses of Physiological Traits of Salicornia european to NaCl Treatment |
| Zhang Meiru1,2, Ma Jinbiao1, Yao Yin'an1, Zhang Xuan1,2, Xiao Xinlong1,2 |
1. Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Uramqi 830011, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract Salicornia europaea was treated with different NaCl (0,10,200,500,800 mmol·L-1) for 11 days. The fresh weight (FW), dry weight (DW), ion contents, relative conductivity, total dissolved solids (TDS) content, the main antioxidant enzyme (SOD, POD,CAT) activities, and membrane lipid peroxide (MDA) were measured. Our results showed that the plant FW and DW peaked in 200 mmol·L-1 NaCl treatment, accompanying with lowest values in relative electronic conductivity (EC), MDA and antioxidant enzyme (SOD, POD,CAT) activities, which indicated that this moderate NaCl concentration promote the growth of S. europaea. And the plant growth, FW and DW were reduced by higher or lower than 200 mmol·L-1 NaCl treatment. The high level of NaCl (500 and 800 mmol·L-1) treatments partly damaged plasma membrane and enzyme system, as showed by enhancement of MDA and EC values and by the reduction of antioxidant enzyme (SOD and CAT) activities. On the other hand, Na+ and K+ were mainly accumulated to shoot to adjust osmotic potential under salt stress, and Na+ content was much more than potassium. With increasing salinity, Na+ content increased while K+ content decreased in shoots and roots to regulate cellular ion balance. Hence, sodium may play more important role than potassium in regulating and tolerating salt stress.
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Received: 04 February 2013
Published: 20 March 2014
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Corresponding Authors:
姚银安（Email：yaoya@ms.xjb.ac.cn）
E-mail: yaoya@ms.xjb.ac.cn
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2014, Vol. 34 
