ISSN:
1432-072X
Keywords:
Key words Carotenoids
;
Diapocarotenes
;
4
;
4′-Diaponeurosporene
;
Bacteriochlorophyll g
;
Heliobacteria
;
Heliobacillus mobilis
;
Heliophilum
;
fasciatum
;
Heliobacterium chlorum
;
Heliobacterium
;
modesticaldum
;
Heliobacterium gestii
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The carotenoids of five species of heliobacteria (Heliobacillus mobilis, Heliophilum fasciatum, Heliobacterium chlorum, Heliobacterium modesticaldum, and Heliobacterium gestii) were examined by spectroscopic methods, and the C30 carotene 4,4′-diaponeurosporene was found to be the dominant pigment; heliobacteria were previously thought to contain the C40 carotenoid neurosporene. In addition, trace amounts of the C30 diapocarotenes diapolycopene, diapo-ζ-carotene, diapophytofluene, and diapophytoene were also found. Up to now, diapocarotenes have been found in only three species of chemoorganotrophic bacteria, but not in phototropic organisms. Furthermore, the esterifying alcohol of bacteriochlorophyll g from all known species of heliobacteria was determined to be farnesol (C15) instead of the usual phytol (C20). Heliobacteria may be unable to produce geranylgeranyol (C20).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s002030050499
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