Linked Life Data

15237606

Source:http://linkedlifedata.com/resource/pubmed/id/15237606

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
2004-7-7
pubmed:abstractText
The volatile organic compounds (VOCs) in four standing cultures of axenic benthic cyanobacteria (Calothrix and Plectonema) were studied by GC/MS analysis. To verify the biogenic origin of the VOCs, 13C-labelling experiments were performed, and the differences in labelling were used to differentiate between biogenic and non-biogenic sources. Strongly labelled biogenic compounds were derived from the shikimate (cresol, skatole), isoprenoid (beta-cyclocitral, beta-ionone, geosmin) and fatty acid pathways (5Z-heptadecene, 3-octanone, 1-hexanol). New odour compounds derived from microorgansims were beta-cyclogeraniol, dihydro-beta-ionone and 2-hydroxy-2,6,6-trimethylcyclohexanone. The latter compound had already been found in lake water, but could not be assigned to a particular organism. Straight chain aldehydes (octanal, nonanal, decanal), cyclohexanone, cyclohexanol and limonene were unlabelled beyond their natural isotope ratio. Therefore, the biogenic origin of these compounds is doubtful despite their occurrence in axenic cultures. The observation that limonene was a racemate supports this view. The precursors and reactions that lead to the formation of these non-biogenic compounds are unknown and it may be that they are formed by the analytical procedures rather than then being present in the culture medium.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0273-1223
pubmed:author
pubmed:issnType
Print
pubmed:volume
49
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
47-54
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Volatile organic compound (VOC) analysis and sources of limonene, cyclohexanone and straight chain aldehydes in axenic cultures of Calothrix and Plectonema.
pubmed:affiliation
Institute of Plant Biology, Limnological Station, Seestr. 187, CH-8802 Kilchberg, Switzerland. hoeckel@limnol.unizh.ch
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't