Olive-Mill Wastewater Bacterial Communities Display a Cultivar Specific Profile |
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Authors: | George?Tsiamis Georgia?Tzagkaraki Athina?Chamalaki Nikolaos?Xypteras Gary?Andersen Dimitris?Vayenas Email author" target="_blank">Kostas?BourtzisEmail author |
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Institution: | (1) Environmental and Natural Resources Management, University of Ioannina, Agrinio, Greece;(2) Present address: Department of Environmental and Natural Resources Management, University of Western Greece, Agrinio, Greece;(3) Centre for Environmental Biotechnology, Lawrence Berkeley National Laboratory, Berkeley, California, USA;(4) Foundation for Research and Technology Hellas, Institute of Chemical Engineering and High Temperature Chemical Processes, Rio, Greece; |
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Abstract: | Culture-dependent and -independent approaches were employed to identify the bacterial community structure from olive-mill
wastewater produced from three olive-fruit varieties. The 233 bacterial isolates recovered were phylogenetically related to
38 members of Firmicutes, Actinobacteria, α-Proteobacteria, β-Proteobacteria, γ-Proteobacteria, and Bacteroidetes. Employing a novel microarray-based approach (PhyloChip) a high bacterial diversity was revealed consisting of 18 different
phyla with representatives from 99 different families. The bacterial diversity in olive-mill wastewater from the three olive
tree varieties was dominated by α-, β-, γ-, δ-, ε-Proteobacteria, Firmicutes, Bacteroidetes, Chloroflexi,
Cyanobacteria, and Actinobacteria. This in-depth analysis of the indigenous microbiota indicated a cultivar-specific bacterial profile. Interestingly, the
common bacterial taxa present in all three varieties examined were restricted indicating that the bacterial communities present
in the olive-mill wastewater are greatly influenced by the olive-fruit variety. |
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