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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472
EISSN: 1735-2630
Vol. 11, No. 2, 2014, pp. 469-476
Bioline Code: st14047
Full paper language: English
Document type: Research Article
Document available free of charge

International Journal of Environment Science and Technology, Vol. 11, No. 2, 2014, pp. 469-476

 en Interactions between algicidal bacteria and the cyanobacterium Microcystis aeruginosa: lytic characteristics and physiological responses in the cyanobacteria
Shao, J.; Jiang, Y.; Wang, Z.; Peng, l.; Luo, S.; Gu, J & Li, R

Abstract

Application of algicidal bacteria is a promising and environmentally friendly way to control cyanobacterial blooms. Lytic effects of the algicidal bacteria on Microcystis aeruginosa check for this species in other resources have been observed, but the interactions between algicidal bacteria and the cyanobacteria are still elusive. An algicidal bacterium Bacillus check for this species in other resources sp. B50 isolated from Lake Donghu showed a highly lytic efficiency on M. aeruginosa NIES-843 through heat-resistant extracellular substances from strain B50. The cell density of strain B50 could be maintained at high levels during the lytic process in bacteria–Microcystis system with inoculation densities of 1.9 x 106 and 1.9 x 107 cfu/mL, resulting in the death of M. aeruginosa NIES-843. However, the population dynamics of strain B50 was a bell-shaped curve at low inoculation densities and no lytic effect could be observed. Results of physiological responses suggested that the lytic efficiency may be mediated through inhibition of metabolism and production of reactive oxygen species.

Keywords
Bacillus sp.; Gene expressions; Lytic characteristics; Microcystis aeruginosa; Oxidative stress; Photosynthesis inhibition

 
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