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. 2010 Oct;41(4):946-55.
doi: 10.1590/S1517-838220100004000013. Epub 2010 Dec 1.

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

Shazia Afrasayab  1 , Muhammad Faisal, Shahida Hasnain
Affiliations

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

Shazia Afrasayab et al. Braz J Microbiol. 2010 Oct.

Abstract

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.

Keywords: Auxin; Plasmid; Rhizobacteria; Salinity; Transformation; Triticum aestivum.

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Figures

Figure 1
Figure 1
Effect of inoculation of salt tolerant bacteria (parent strains and their transformants) on moisture content (%) of T. aestivum seedlings under NaCl stress
Figure 2
Figure 2
Effect of inoculation of salt tolerant bacteria (parent strains and their transformants) on Na/K ratio of T. aestivum seedlings under NaCl stress.
See this image and copyright information in PMC

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