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Journal: JOURNAL OF PLANT ENVIRONMENTAL PHYSIOLOGY | Year:1390 | Volume:6 | Issue:4 (24) | Start Page:72 | End Page:78

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Title

CYANOBACTERIUM OSCILLATORIA SP. WITH AND WITHOUT CARBON DIOXIDE CONDITIONS AND THE COMBINATION OF SALINITY AND CARBON DIOXIDE

Pages

 Start Page 72 | End Page 78

Abstract

 The aim of this research was studying of ACCLIMATION of the cyanobacterium OSCILLATORIA sp. at the combination of SALINITY and carbon dioxide concentration. After purification using subcultures, pure strain has been inoculated on liquid BGO-11 culture media. Combination of SALINITY and carbon dioxide treatments have been treated at 28oC and 1800 lux continuous irradiance. Salt treatments include culture media with 0.4, 0.5, 0.6% NaCl. Carbon dioxide treatment were non aeration, aeration, and carbon dioxide inoculation both with and without shaking which were treated in above salt condition. Survival, growth, specific growth rate, phycoerythrin, phycocyanine, and allophycocyanine contents have been evaluated beside phycobilisome efficiency. Results showed that the highest rate of growth was related to 0.5% SALINITY in non aeration and shaking conditions. At the 9th day, growth reach to same point at both 0.5 and 0.6% SALINITY. After that growth rate tend to lower at 0.6% SALINITY. At 0.5% SALINITY, growth rate seems greater at aeration condition but after that both tend to the same point at 11th day after inoculation. The content of allophycocyanine was the highest rate at this SALINITY. Using carbon dioxide enrichment, the highest growth rate was related to 0.4% SALINITY. Collectively results show that the ACCLIMATION of this strain seems possible through pigment composition change and phycobilisome efficiency. This seems an strong evidence for using this cyanobacterium in paddy-fields which include both SALINITY and carbon dioxide concentration tension as a whole.

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