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Prof. Surajit Das, Neelam Mangwani, Supriya Kumari, S. K. Shukla and T. S. Rao, Department of Life Science, Phenotypic switching in biofilm-forming marine bacterium Paenibacillus lautus NE3B01.

B
iofilm forming marine bacterium Paenibacillus lautus NE3B01 formed a swarming type of colony pattern and revealed the existence of two phenotypicaly distinct cells (i.e. cocci and rods). Biofilm growth studies (crystal violet assay) with the isolate showed
significant biofilm formation by 6 h and the detachment phase was observed after 18 h. The CSLM study showed that P. lautus formed a biofilm with a average thickness of 14.8 ± 2.6 µm; a high roughness coefficient (0.379 ± 0.103) and surface to bio-volume ratio (4.59±1.12 µm2/ µm3) indicating a highly uneven topography of the biofilm. The current findings suggest that P. lautus has two vegetative phenotypes and can switch over from motile rods to nonmotile cocci and vice-versa. The work is supported by Department of Biotechnology, Government of India. More in Current Microbiology (2014) 68: 648-656. DOI 10.1007/s00284-014-0525-8. (List of Research)

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