Isolation of Paenibacillus sp. and Assessment of its Potential for Enhancing Mineral Weathering |
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Authors: | Dianfeng Liu Bin Lian Hailiang Dong |
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Affiliation: | 1. Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Microbiology, College of Life Sciences, Nanjing Normal University , Nanjing , China;2. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences , Guiyang , China;3. Geomicrobiology Laboratory, The Geological Lab Center, China University of Geosciences , Beijing , China;4. Department of Geology , Miami University , Oxford , Ohio , USA |
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Abstract: | One mineral-solubilizing bacterial strain designated KT was isolated from a soil in Henan Province, China. The full-length 16S rRNA gene sequence showed 95.2 to 96.7% similarity to the bacteria of the genus Paenibacillus, indicating that the strain KT belonged to the genus Paenibacillus. The potential of this strain to release potassium from silicate minerals was investigated using a potassium-bearing rock as the sole source of potassium to support its growth. After inoculation for 7 days, the concentrations of water-soluble Al, Ca and Fe released from the potassium-bearing rock in active bacterial culture were higher than those from the control with autoclaved inoculum, but the concentration of water-soluble K in active bacterial culture was similar to that in the control. The concentrations of HNO3-extractable Al, Ca, Fe and K from the bacterial culture were also higher than those in the control. These results showed strain KT was able to release potassium from potassium-bearing rock. These results have important implications for extraction of potassium from rocks to support plant growth. |
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Keywords: | bioweathering potassium-bearing rock Paenibacillus potassium-solubilizing bacteria |
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