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IJBB Vol.43(6) [December 2006] >


Title: Facultative alkalophilic bacteria from mangrove soil with varying buffering capacity and H+ conductance
Authors: Kannan, P
Ignacimuthu, S
Paulraj, M Gabriel
Keywords: Facultative alkalophile
Buffering capacity
H+ conductance
Planococcus
Bacillus
Corynebacterium
Issue Date: 2006
Publisher: CSIR
Abstract: Facultative alkalophilic bacteria Planococcus sp. (EMGA-26), Bacillus sp. (EMGA-29) and Corynebacterium spp. (EMGA-33 and 130) were isolated from mangrove soil samples. Neutrophiles were predominant than alkalophiles. Buffering capacity and membrane H+ conductance were investigated for the strains grown in PPYG medium at pH 10.5 using acid pulse technique. Bacillus sp. showed higher buffering capacity than Planococcus sp. and Corynebacterium spp. Buffering capacity was two-fold higher in Corynebacterium sp. EMGA-33 than in EMGA-130. The membrane H+ conductance was high in Bacillus sp. and was directly proportional to the buffering capacity values. The Bacillus sp. (EMGA-29) had higher cell membrane adaptability in high pH environment than the Planococcus sp. and Corynebacterium spp.
Page(s): 382-385
ISSN: 0301-1208
Source:IJBB Vol.43(6) [December 2006]

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