Research output: Contribution to journal › Article › peer-review
A WIDESPREAD CHLOROPHYLL TRANSFORMATION PATHWAY IN THE AQUATIC ENVIRONMENT. / ECKARDT, C B ; PEARCE, G E S ; KEELY, B J ; KOWALEWSKA, G ; JAFFE, R ; MAXWELL, J R .
In: Organic Geochemistry, Vol. 19, No. 1-3, 12.1992, p. 217-227.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - A WIDESPREAD CHLOROPHYLL TRANSFORMATION PATHWAY IN THE AQUATIC ENVIRONMENT
AU - ECKARDT, C B
AU - PEARCE, G E S
AU - KEELY, B J
AU - KOWALEWSKA, G
AU - JAFFE, R
AU - MAXWELL, J R
PY - 1992/12
Y1 - 1992/12
N2 - Combined liquid chromatography mass spectrometry studies of the pigment distributions of a variety of lake and marine sediments from different depositional settings reveal the presence of steryl chlorin esters as significant components of the chlorin assemblages. The components are water column transformation products of phytoplankton chlorophyll a, and it is suggested that they form through an enzymatic esterification or transesterification process during senescence or decay. Remarkably, the steroidal alcohols are esterified mainly to a common nucleus, pyrophaeophorbide a. The transformation pathway involved appears to be a ubiquitous one in marine and lacustrine environments, and the components represent a significant sedimentary ''sink'' for the chlorophyll biosynthesised in the euphotic zone. Future water column studies of the changes in photosynthetic pigments in phytoplankton blooms and of pigment fluxes should take into account the likely presence of steryl chlorin esters.
AB - Combined liquid chromatography mass spectrometry studies of the pigment distributions of a variety of lake and marine sediments from different depositional settings reveal the presence of steryl chlorin esters as significant components of the chlorin assemblages. The components are water column transformation products of phytoplankton chlorophyll a, and it is suggested that they form through an enzymatic esterification or transesterification process during senescence or decay. Remarkably, the steroidal alcohols are esterified mainly to a common nucleus, pyrophaeophorbide a. The transformation pathway involved appears to be a ubiquitous one in marine and lacustrine environments, and the components represent a significant sedimentary ''sink'' for the chlorophyll biosynthesised in the euphotic zone. Future water column studies of the changes in photosynthetic pigments in phytoplankton blooms and of pigment fluxes should take into account the likely presence of steryl chlorin esters.
KW - STERYL CHLORIN ESTERS
KW - LIQUID CHROMATOGRAPHY MASS SPECTROMETRY OF CHLORINS
KW - CHLOROPHYLL TRANSFORMATIONS
KW - LC-MS
KW - CHROMATOGRAPHY MASS-SPECTROMETRY
KW - BLACK-SEA
KW - SOUTHERN-OCEAN
KW - LAKE
KW - MARINE
KW - PRESERVATION
KW - DEGRADATION
KW - DIAGENESIS
KW - SEDIMENTS
KW - PRODUCTS
M3 - Article
VL - 19
SP - 217
EP - 227
JO - Organic Geochemistry
JF - Organic Geochemistry
SN - 0146-6380
IS - 1-3
ER -