The major important macronutrients for plants are phosporus (P) and potassium (K). Bio-fertilizers containing phosphate and potassium solubilizing bacteria can be used as an alternative to keep available P and K in the soil. It is important to identify phosphate- and potassium-solubilizing bacteria from weathered components of denatured rock mountain in order to develop such a bio-fertilizer. On modified Aleksandrov medium, twenty-five strains were isolated from samples of soils/weathered rocks from HaTien Mountain in KienGiang, Vietnam. Their colonies were spherical or irregular in shape, white to yellow in colour, with rod-shaped, motile cells. Phosphorus (P) and potassium are the two most critical macronutrients for plants (K). To preserve available P and K in the soil, bio-fertilizers containing phosphate and potassium solubilizing bacteria can be utilised. In order to produce such a bio-fertilizer, it is necessary to find phosphate- and potassium-solubilizing bacteria from weathered components of denatured rock mountains. Twenty-five strains were isolated from samples of soils/weathered rocks from HaTien Mountain in KienGiang, Vietnam, on modified Aleksandrov medium. Their colonies were spherical or irregularly shaped, white to yellow in colour, and had motile rod-shaped cells. TC1A strain had 99.90 percent identity with Bacillus paramycoides strain 2914 (MT611870); CH7D strain had 99.88 percent identity with Bacillus megaterium strain LCR107 (FJ976616); TD6B strain had 99.81 percent identity with Bacillus subtilis strain R0-14 (MN330151); and CH9E strain had 99.43 percent identity with Agrobacterium tumefaciens strain ICMP5856 (MW363338). The strain TC1A was chosen because of its high phosphate and potassium solubilizing capacity, as well as its future potential for application in bio-fertilizer production.
Author (S) DetailsCao Ngoc Diep
Biotechnology R&D Institute, CanTho University, Vietnam.
Bui The Vinh
CanTho Dairy Factory, Vietnam.
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