Abstract
Genome of the hydrocarbon-degrading bacterium Bacillus pumilus PDSLzg-1 was analyzed. A group of gene clusters and pathways associated with nitrogen fixation, plant-bacterial interactions, plant growth-promoting hormone synthesis, antibiotics, secondary metabolite, and disease resistance were identified. In addition, 0.06 mg/L of 3-indoleacrylic acid (IAA) and 2 mg/L of gibberellin (GA) were, respectively, detected in PDSLzg-1 fermentation broth by high-performance liquid chromatography (HPLC). Up-regulated expression levels of 11 key genes related to GA and IAA biosynthesis pathways were detected after the induction of 0.2% n-hexadecane. Furthermore, bioassays showed that PDSLzg-1 fermentation could significantly promote the length and biomass of the stems and roots of Triticum aestivum L., while inhibited Colletotrichum truncatum colonization. Results indicated that B. pumilus PDSLzg-1 had plant growth-promoting and antifungal functions, besides its potential applications in phyto-microbial bioremediation combinations for oil-contaminated soil.
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Acknowledgments
We thank Shan Xue for editing the figures.
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This work was supported by the China Major Science and Technology Program for Water Pollution Control and Treatment, the Standardization and Scale of Application of Rural Drinking Water Security Technology (2015ZX07402003-4).
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Hao, K., Ullah, H., Qin, X. et al. Effectiveness of Bacillus pumilus PDSLzg-1, an innovative Hydrocarbon-Degrading Bacterium conferring antifungal and plant growth-promoting function. 3 Biotech 9, 305 (2019). https://doi.org/10.1007/s13205-019-1842-1
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DOI: https://doi.org/10.1007/s13205-019-1842-1