Comparative study of wild and transformed salt tolerant bacterial strains on Triticum aestivum growth under salt stress

Brazilian Journal of Microbiology

Shazia Afrasayab¹  Muhammad Faisal¹  Shahida Hasnain¹ 

[1] ,University of the Punjab Department of Microbiology & Molecular Genetics ,Pakistan

关键词: Triticum aestivum;    Plasmid;    Rhizobacteria;    Salinity;    Auxin;    Transformation;   

DOI  :  10.1590/S1517-83822010000400013

来源: SciELO

【 摘 要 】

Eleven salt tolerant bacteria isolated from different sources (soil, plants) and their transformed strains were used to study their influence on Triticum aestivum var. Inqlab-91 growth under salt (100 mM NaCl) stress. Salt stress caused reduction in germination (19.4%), seedling growth (46%) and fresh weight (39%) in non-inoculated plants. In general, both wild and transformed strains stimulated germination, seedling growth and fresh weight in salt free and salt stressed conditions. At 100 mM NaCl, Staphylococcus xylosus ST-1 caused 25% increments in seedling length over respective control. Soluble protein content significantly enhanced (49%) under salt stress as compared to salt free control. At 100 mM NaCl parental strain PT-5 resulted about 32% enhancement in protein content over respective control treatment. Salt stress induced the promotion of auxin content in seedlings. Overall, Bacillus subtilis HAa2 and transformed E. coli-SP-7-T, caused 33% and 30% increases in auxin content, respectively, were recorded under salt stress in comparison to control.

【 授权许可】

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