Soil microbe Bacillus subtilis (GB03) induces biomass accumulation and salt tolerance with lower sodium accumulation in wheat
Jin-Lin Zhang A B E , Mina Aziz B , Yan Qiao C , Qing-Qiang Han A , Jing Li A , Yin-Quan Wang D , Xin Shen B , Suo-Min Wang A and Paul W. Paré B E
+ Author Affiliations
- Author Affiliations
A State Key Laboratory of Grassland Agro-Ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, P. R. China.
B Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061, USA.
C College of Agronomy, Gansu Agricultural University, Lanzhou 730070, P. R. China.
D Department of Chinese Medicine, Gansu University of Traditional Chinese Medicine, Lanzhou 730000, P. R. China.
E Corresponding authors. Emails: jlzhang@lzu.edu.cn; paul.pare@ttu.edu
Crop and Pasture Science 65(5) 423-427 https://doi.org/10.1071/CP13456
Submitted: 19 December 2013 Accepted: 14 April 2014 Published: 16 June 2014
Abstract
Bacillus subtilis strain GB03 has been shown to confer salt tolerance in Arabidopsis thaliana. In this study, the potential for GB03 to promote biomass accumulation and increase salt tolerance was investigated in wheat (Triticum aestivum). Soil-grown wheat seedlings were assayed for dry-weight increase. Endogenous Na+ and K+ contents were determined in plants with or without soil inoculation with GB03 along with 0, 25 or 100 mm NaCl solution added to the soil. We demonstrated that the introduction of GB03 in the soil triggered wheat biomass accumulation. Furthermore, GB03 improved salt tolerance as measured by increased tissue mass, lower Na+ accumulation and improved K+/Na+ ratio when GB03-inoculated plants were grown under elevated salt conditions. This study provides insight for the application of selected bacteria to monocot crops to combat saline toxicity.
Additional keywords: Bacillus subtilis (GB03), biomass accumulation, salt tolerance, sodium accumulation, wheat.
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