Occurrence of new bacteriochlorophyll d forms in natural populations of green photosynthetic sulfur bacteria

Abstract The presence of unusual bacteriochlorophyll (BChl) d forms in natural populations of green photosynthetic sulfur bacteria is reported. These new pigment forms share spectral properties with the standard BChl d previously described in green sulfur bacteria, i.e. absorption maxima at 429 nm a...

Full description

Saved in:
Bibliographic Details
Published in:FEMS microbiology ecology 1998-08, Vol.26 (4), p.257-267
Main Authors: Borrego, Carles M, Garcia-Gil, Jesus, Cristina, Xavier P., Vila, Xavier, Abella, Carles A.
Format: Article
Language:English
Subjects:
Alcohols
Animal, plant and microbial ecology
Bacteria
Bacteriochlorophyll
Bacteriochlorophyll d
Bacteriology
Biological and medical sciences
Chlorochromatium aggregatum
Chloronema
Chloronema sp
Chromatography
Consortia
Ecology
Esterification
Fundamental and applied biological sciences. Psychology
Green sulfur bacteria
High performance liquid chromatography
Homology
Light adaptation
Liquid chromatography
Microbial ecology
Microbiology
Morphology, structure, chemical composition
Natural populations
Organic chemistry
Pelodictyon clathratiforme
Photosynthesis
Pigments
Populations
Sulfur
Sulfur bacteria
Various environments (extraatmospheric space, air, water)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Abstract The presence of unusual bacteriochlorophyll (BChl) d forms in natural populations of green photosynthetic sulfur bacteria is reported. These new pigment forms share spectral properties with the standard BChl d previously described in green sulfur bacteria, i.e. absorption maxima at 429 nm and 656 nm at the Soret and Qy bands, respectively, but greatly differ in the HPLC analysis. Two types of natural BChl d were found: type I, observed in populations of Pelodictyon clathratiforme and the green consortium ‘Chlorochromatium aggregatum’, was composed of three main homologs unevenly distributed along the chromatographic run. BChl d type II was only observed in photosynthetic communities dominated by Chloronema spp., and eluted as a cluster of seven homologs characterized by their high apolarity. The distinct chromatographic behavior suggests differences in the chemical structures of these pigments, which are suspected to be located at the C-17 position of the macrocycle by esterification of alcohols longer than farnesyl. The possible origin of these new pigment forms as well as their potential role in light adaptation in natural habitats is discussed.
ISSN:0168-6496
1574-6941
DOI:10.1111/j.1574-6941.1998.tb00510.x