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Properties of cellulolytic Streptomyces strains from saline-sodic soil and their effects on  rice growth under saline conditions

Tariq Aslam, Ao Lu, Maryam Rana, Xialing Sun, Dongbo Liu and Hong Yan

Rice (Oriza sativa) is one of the most important candidate crops that can be used to increase crop yield in the saline region of China. Cellulolytic microorganisms are considered to be the major drivers of litter decomposition in saline-sodic soils. This work presents an evaluation of the effects of cellulolytic Streptomyces strains on the growth of rice plants under saline conditions. In this study, three cellulolytic bacterial isolates were obtained from saline-sodic grassland soils and identified as Streptomyces by 16S rDNA sequence analysis. These Streptomyces isolates were found to be positive for the production of carboxymethyl cellulase, xylanase, and nitrogenase activities under normal and saline conditions. All three isolates produced indole-3-acetic acid under saline (150 mM NaCl) and non-saline conditions. Furthermore, the three Streptomyces isolates were tested for their plant growth-promoting traits in pot trials using saline-sodic soil. Inoculation of rice plants with each of these Streptomyces strains resulted in significant increases in growth performance, including fresh and dry weights, plant height, and leaf width, compared to the control rice plants. This is the first known report of cellulolytic Streptomyces strains from saline-sodic soils improving plant growth under saline conditions. Results from this study suggested that these cellulolytic Streptomyces strains could be used to increase plant growth under saline-sodic conditions

To Cite this article: Aslam, T., A. Lu, M. Rana, X. Sun, D. Liu and H. Yan. 2024. Properties of cellulolytic Streptomyces strains from saline-sodic soil and their effects on  rice growth under saline conditions. Pak. J. Bot., 56(3): DOI:  

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