Data Report: Characterization of distributions of photosynthetic pigments in sapropel from Holes 966D and 969C

Gall, V. Cariou-Le; Rosell-Mele, A.; Maxwell, James R.

doi:10.2973/odp.proc.sr.160.055.1998

Proceedings of the Ocean Drilling Program, 160 Scientific Results 1998

DOI: 10.2973/odp.proc.sr.160.055.1998

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Data Report: Characterization of distributions of photosynthetic pigments in sapropel from Holes 966D and 969C

V. Cariou-Le Gall¹,

A. Rosell-Mele²,

James R. Maxwell³

Abstract: The distribution of chlorins and carotenoids in 22 sapropel samples from Ocean Drilling Program Leg 160, Holes 966D and 969C, have been examined by combined liquid chromatography-mass spectrometry under atmospheric pressure ionization conditions. Up to 42 components were detected over the range of samples (including chlorophyllone a, pyrophaeophorbides, pyrophaeophytins, steryl chlorin esters a and b, as well as carotenes). The samples showed two basic types of pigment distribution, with no obvious relationshi… Show more

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Cited by 3 publications

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Abundance of a chlorophyll a precursor and the oxidation product hydroxychlorophyll a during seasonal phytoplankton community progression in the Western English Channel

Steele

Tarran

Widdicombe

et al. 2015

Progress in Oceanography

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Article history: Available online xxxx a b s t r a c tThis study presents the first in-situ measurements of the chlorophyll a oxidation product, hydroxychlorophyll a as well as the chlorophyll a precursor, chlorophyll a P276 conducted over an annual cycle. Chlorophyll a oxidation products, such as hydroxychlorophyll a may be associated with the decline of algal populations and can act as an initial step in the degradation of chlorophyll a into products which can be found in the geochemical record, important for studying past climate change events. Here, hydroxychlorophyll a and chlorophyll a P276 were measured at the long-term monitoring station L4, Western Channel Observatory (UK, www.westernchannelobservatory.org) over an annual cycle (2012). Weekly measurements of phytoplankton species composition and abundance enabled detailed analysis of possible sources of hydroxychlorophyll a. Dinoflagellates, 2 diatom species, the prymnesiophyte Phaeocystis spp. and the coccolithophorid Emiliania huxleyi were all associated with hydroxychlorophyll a occurrence. However, during alternate peaks in abundance of the diatoms, no association with hydroxychlorophyll a occurred, indicating that the oxidation of chlorophyll a was dependant not only on species but also on additional factors such as the mode of mortality, growth limiting factor (i.e. nutrient concentration) or phenotypic plasticity. Surface sediment samples contained 10 times more hydroxychlorophyll a (relative to chlorophyll a) than pelagic particulate samples, indicating that more chlorophyll a oxidation occurred during sedimentation or at the sediment-water interface, than in the pelagic environment. In addition, chlorophyll a P276 correlated with chl-a concentration, thus supporting its assignment as a chl-a precursor.

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Abundance of a chlorophyll a precursor and the oxidation product hydroxychlorophyll a during seasonal phytoplankton community progression in the Western English Channel

Steele

Tarran

Widdicombe

et al. 2015

Progress in Oceanography

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show abstract

On the sedimentary occurrence of chlorophyllone a

2003

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The 13 2 ,17 3 -cyclopheophorbide a enol (CPP) is shown to convert mainly to a $1:1 mixture of (13 2 R=S) chlorophyllones a (Chlone), when chromatographed over silica gel or alumina supports. 15 1 -hydroxychlorophyllonelactone a and some other chlorophyll a related compounds are also tentatively identified as minor transformation products of CPP. This raises the possibility that the chlorophyllones reported in recent sediments may be analytical artifacts from CPP. However, data for the surface sediments from Lake Motte as well as literature data for other contemporary sediments show that, (i) they are not artifacts, (ii) considering that CPP is the intermediate compound in the formation of chlorophyllones from chlorophyll a, the hydroxylation of CPP in the sedimentary environment involves an enzymatic process leading preferentially to 13 2 S chlorophyllone a.

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Steryl esters of pyrophaeophorbide b : a sedimentary sink for chlorophyll b

Talbot

Head

Harris

et al. 1999

Organic Geochemistry

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Data Report: Characterization of distributions of photosynthetic pigments in sapropel from Holes 966D and 969C

Cited by 3 publications

References 1 publication

Abundance of a chlorophyll a precursor and the oxidation product hydroxychlorophyll a during seasonal phytoplankton community progression in the Western English Channel

Abundance of a chlorophyll a precursor and the oxidation product hydroxychlorophyll a during seasonal phytoplankton community progression in the Western English Channel

On the sedimentary occurrence of chlorophyllone a

Steryl esters of pyrophaeophorbide b : a sedimentary sink for chlorophyll b

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