Abstract:
:The abundance and diversity of chemotactic heterotrophic bacteria associated with Arctic cyanobacteria was determined. The viable numbers ranged between 10(4) and 10(6) cell g(-1) cyanobacterial biomass. A total of 112 morphotypes, representing 22 phylotypes based on their 16S rRNA sequence similarity were isolated from the samples. All the phylotypes were Gram-negative with affiliation to the proteobacterial and bacteroidetes divisions. Among the 22 phylotypes, 14 were chemotactic to glucose. Majority of the phylotypes were psychrotolerant showing growth up to 30 °C. Representatives of Alphaproteobacteria, the genus Flavobacterium and the gammaproteobacterial Alcanivorax sp, were psychrophilic with growth at or below 18 °C. A significant percentage of phylotypes were pigmented (~68 %), rich in unsaturated membrane fatty acids and tolerated pH values and NaCl concentrations between 5.0-8.0 and 0.15-1.0 M, respectively. The percentages of phylotypes producing extracellular cold-active enzymes at 4 °C were amylase (18.18 %), lipase and urease (45.45 %), caseinase (59.09 %) and gelatinase (31.8 %).
journal_name
Curr Microbioljournal_title
Current microbiologyauthors
Prasad S,Pratibha MS,Manasa P,Buddhi S,Begum Z,Shivaji Sdoi
10.1007/s00284-012-0243-zsubject
Has Abstractpub_date
2013-01-01 00:00:00pages
64-71issue
1eissn
0343-8651issn
1432-0991journal_volume
66pub_type
杂志文章abstract::Nine domestic wine samples collected from a Japanese winery were examined for the presence of fumonisin B1 (FB1), fumonisin B2 (FB2), and fumonisin B3 (FB3), as well as ochratoxin A (OTA) and ochratoxin B (OTB). Wine samples spiked with 13C-labeled internal standards (13C34-FB1 and 13C20-OTA) were diluted with phospha...
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journal_title:Current microbiology
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