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Publication Type J
Authors Wang, D. Y., H. Y. Wang, B. Han, B. Wang, A. P. Guo, D. Zheng, C. J. Liu, L. L. Chang, M. Peng and X. C. Wang
Title Sodium instead of potassium and chloride is an important macronutrient to improve leaf succulence and shoot development for halophyte Sesuvium portulacastrum
Source Plant Physiology and Biochemistry
Author Keywords Halophyte Leaf succulence Potassium ion Salt stress Sesuvium portulacastrum Sodium chloride salt tolerance salicornia-europaea mesembryanthemum-crystallinum comparative genomics salinity stress osmotic-stress growth plants arabidopsis na+
Abstract Soil salinity is contributed largely by NaCl but some halophytes such as Sesuvium portulacastrum have evolved to adapt salinity environment and demonstrate optimal development under moderate salinity. To elucidate the detail mechanisms of the great salt tolerance and determine the respective contributions of Na+, K+ and Cl- on the development of S. portulacastrum, morphological and physiological analysis were performed using plants supplied with 200 mM of different ions including cations (Na+, K+, Li+) and anions (Cl-, NO3-, Ac-) respectively. The results revealed that the salt-treated plants accumulated large amounts of sodium in both leaf and stem. There was a greater shoot growth in presence of external Na+ compared to K+ and Cl-. Na+ was found more effective than K+ and Cl- in cell expansion, leaf succulence, and shoot development. Flame emission and X-Ray microanalysis revealed the relative Na+ content was much higher than K+ and Cl- in both leaf and stem of well developed S. portulacastrum, leading to a higher Na+/K+ ratio. The effects of different ions on the development of S. portulacastrum were listed as the following: Na+ > NO3- > CK > Cl- > K+ > Ac- > Li+. These results demonstrated NaCl toxicity is attributable largely to the effect of Cl- but rarely to Na+, and thus sodium is concluded as a more important macronutrient than potassium and chloride for improving leaf succulence and shoot development of halophyte S. portulacastrum. (C) 2011 Elsevier Masson SAS. All rights reserved.
Author Address [Wang, Dongyang; Wang, Haiyan; Han, Bing; Wang, Bin; Guo, Anping; Liu, Chongjing; Chang, Lili; Peng, Ming; Wang, Xuchu] Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Haikou 571101, Hainan, Peoples R China. [Wang, Dongyang; Wang, Haiyan; Han, Bing; Wang, Bin; Liu, Chongjing; Wang, Xuchu] Hainan Univ, Haikou 570228, Hainan, Peoples R China. [Zheng, Dong] Beijing Normal Univ, Analyt & Testing Ctr, Beijing 100875, Peoples R China. Wang, XC (reprint author), Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Haikou 571101, Hainan, Peoples R China gap211@126.com xchwanghainan@163.com
ISSN 0981-9428
ISBN 0981-9428
29-Character Source Abbreviation Plant Physiol. Biochem.
Publication Date Feb
Year Published 2012
Volume 51
Beginning Page 53-62
Digital Object Identifier (DOI) 10.1016/j.plaphy.2011.10.009
Unique Article Identifier WOS:000300526000008
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