Askari, H.

Nakhoda, B.

Rajabi, F.

Torabi, S.

Vazan, S.

English

Wageningen UR (University & Research Centre): Publication System

1 
 
Effect of salinity on Na+ and K+  compartmentation in salt tolerant and 
sensitive wheat genotypes 
Vazan S.1, Rajabi F.1 , Askari H.2 , Nakhoda B.3, Torabi S.4 
1Department of Agronomy, Karaj Branch , Islamic Azad University, karaj, Iran 
2Biotechnology Department, New Technologies and Energy Engineering Faculty, Shahid Beheshti University, 
G.C., Tehran, Iran 
3Systems Biology Department,Agricultural Biotechnology Research Institute of Iran, Seed and Plant 
Improvement Campus 
4Department of Biotechnology, Science and research Branch, Islamic Azad University, Tehran, Iran 
 
ABSTRACT  
In order to investigation of Na+ compartmentation in different wheat tissues under salinity stress, 20 different 
wheat genotypes including salt tolerant, semi-tolerant and sensitive ones was studied in the greenhouse 
condition. A factorial experiment was carried out as based on completely randomized design (CRD) in three 
replicates in normal and salinity conditions with 12 dS m-1 electrical conductivity (EC). Soil was salinized with 
calculated amount of NaCl salt to develop level of salinity (12 dSm-1) while control has the same EC as that of 
original soil. 20 pure wheat genotypes were selected from 100 genotypes during the same experimental method 
and condition.  Higher K+/ Na+ ratio and more dry weight were two criterions for selecting of tolerant 
genotypes. Na+ and K+ content was measured in the root, internodes, flag leaf and its sheath blade to assess the 
mechanism of salt exclusion. The results showed that Na+ accumulated in the root and leaf sheath of tolerant 
genotypes and this mechanism prevented to transfer Na+ to leaf blade. Whereas, K+ could be transferred to leaf 
blade more than Na+. These results were vice versa in sensitive genotypes. Leaf sheath was detected as a storage 
tissue that prevented to transfer of Na+ to leaf blade and this mechanism involved in improving of salt tolerance. 
Moreover, significant negative correlation between Na+ and K+ content was announced in most tissues due to 
transfer of K+ to above ground tissues and excluded Na+ in tolerant genotypes. 
 
Keywords: Ions, K+/ Na+ ratio, NaCl, wheat tissue   
  
 


Effect of salinity on Na+ and K+ compartmentation in salt tolerant and sensitive wheat genotypes

https://library.wur.nl/ojs/index.php/AE2012/article/download/12443/11945

Effect of salinity on Na+ and K+ compartmentation in salt tolerant and sensitive wheat genotypes

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