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《Acta Botanica Boreali-occidentalia Sinica》 2002-01
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A study on the characters of content of inorganic ions in salt-stressed Suaeda salsa

ZHANG Hai-yan (Department of Biology,Shanxi Teacher's University,Linfen,Shanxi 041004,China)  
The potted plants of Suaeda salsa were respectively treated with different concentration of NaCl solutions.Inorganic ions content,selectivity of K over Na of old leaves,young leaves and roots were measured and compared.Na + and Cl - content of leaves and roots increased with the increasing NaCl concentrations,and had similar accumulating tendency,Na +,Cl - and the total ions content in roots were evidently lower than that in leaves under salt treatments,and a characteristic adaptability to salt environment that a large number of ions (e.g.Na +,Cl -) were preferentially accumulated in leaves was suggested.K + and Ca 2+ contents in NaCl-treated leaves were lower than controls,but with increasing salt concentration the contents remained relatively stable,while K + contents,K/Na ratios and selectivity of K over Na in roots were higher than in leaves and thus K + deficiency in shoots under salt stress could be compensated.NO - 3 absorption was enhanced by low salt concentration (100 mmol/L NaCl).Furthermore,osmotic potential in leaves dropped while osmotic adjustment ability increased with increasing NaCl concentration.Osmotic potential of young leaves was lower than old leaves,however osmotic adjustment ability of them were similar.
【CateGory Index】: Q945.78
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