C25 highly branched isoprenoid alkenes from the marine benthic diatom Pleurosigma strigosum

Grossi, Vincent; Beker, Béatriz; Geenevasen, Jan A. J.; Schouten, Stefan; Raphel, Danielle; Fontaine, Marie-France; Damsté, Jaap S. Sinninghe

doi:10.1016/j.phytochem.2004.09.002

Cited by 64 publications

(39 citation statements)

References 23 publications

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“…The identification of P. stuxbergii var. rhomboides as an IP 25 producer is also consistent with the formation of other HBIs by several Pleurosigma diatoms 20,32 , although we are unaware of any reports describing the HBI content of P. stuxbergii var. rhomboides, per se.…”

Section: Identification Of Ipsupporting

confidence: 79%

“…A diatom source has been proposed 7,16 , however, since IP 25 has been reported in Arctic sea ice biota dominated by diatoms 16,17 and similar lipids occur in some non-sea ice algae [18][19][20][21][22] . More specifically, it has been hypothesized that sea ice diatoms belonging to the Haslea genus are likely producers of IP 25 on the basis of biosynthesis of related biomarkers by such species 7,16,17,[23][24][25] .…”

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confidence: 99%

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Source identification of the Arctic sea ice proxy IP25

et al. 2014

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Analysis of the organic geochemical biomarker IP 25 in marine sediments is an established method for carrying out palaeo sea ice reconstructions for the Arctic. Such reconstructions cover timescales from decades back to the early Pleistocene, and are critical for understanding past climate conditions on Earth and for informing climate prediction models. Key attributes of IP 25 include its strict association with Arctic sea ice together with its ubiquity and stability in underlying marine sediments; however, the sources of IP 25 have remained undetermined. Here we report the identification of IP 25 in three (or four) relatively minor (o5%) sea ice diatoms isolated from mixed assemblages collected from the Canadian Arctic. In contrast, IP 25 was absent in the dominant taxa. Chemical and taxonomical investigations suggest that the IP 25 -containing taxa represent the majority of producers and are distributed pan-Arctic, thus establishing the widespread applicability of the IP 25 proxy for palaeo Arctic sea ice reconstruction.

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Section: Identification Of Ipsupporting

confidence: 79%

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confidence: 99%

Source identification of the Arctic sea ice proxy IP25

et al. 2014

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“…All-(Z)-heneicosa-3,6,9,12,15,18-hexaene and n-21:6 hydrocarbon were found as major hydrocarbons in diatoms. A series of C 25 highly branched isoprenoid (HBI) alkenes from the diatoms Haslea ostrearia, Rhizosolenia setigera, and Pleurosigma intermedium have been reported (Volkman et al, 1994;Grossi et al, 2004). Some representative HBI alkenes structures can be found in Figure 1.…”

Section: Isoprenoidsmentioning

confidence: 99%

Exploring Valuable Lipids in Diatoms

et al. 2017

Front. Mar. Sci.

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Diatoms are one major group of algae in oceans that accounts almost half of marine primary food production and have also been identified as a promising candidate for biofuel production for their high level accumulation of lipids. They have gained increasingly attention for their potential applications in pharmaceuticals, cosmetics, nutrient supplements, and biofuels. This review aims to summarize the recent advances in diatom lipid study. Chemical structures and bioactivities of different lipid classes are discussed with a focus on valuable lipids such as fatty acids, polar lipids, steroids, and oxylipins from various diatoms species. Further, current extraction and fractionation approaches are compared and recent analytical techniques and methods are also reviewed with an emphasis on lipid class composition and fatty acid profiling. Biosynthetic pathways and key catalyzing enzymes are illustrated for a better understanding of fatty acid metabolism. Past engineering attempts toward generating appropriate diatom strains for lipid production are discussed with examples using mutagenesis, environmental stimulants, and genetic modification methods. Some possible future directions and applications of diatom-derived lipids are also proposed.

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“…HBI alkenes are widely distributed in aquatic environments (Rowland and Robson, 1990;Sinninghe-Damsté et al, 2004), although they appear to originate from a relatively small number of diatomaceous algae including Haslea spp., Rhizosolenia spp., Pleurosigma spp. and Navicula spp.…”

Section: Highly Branched Isoprenoid (Hbi) Alkenesmentioning

confidence: 99%

“…and Navicula spp. Sinninghe-Damsté et al, 2004;Belt et al, 2000Belt et al, , 2001Allard et al, 2001;Grossi et al, 2004). Despite this, they have been commonly reported in marine sediments worldwide and provide some insight into the deposition of organic matter from the water column.…”

Section: Highly Branched Isoprenoid (Hbi) Alkenesmentioning

confidence: 99%

Photo- and Free Radical-Mediated Oxidation of Lipid Components During the Senescence of Phototrophic Organisms

Rontani¹

2012

Senescence

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C25 highly branched isoprenoid alkenes from the marine benthic diatom Pleurosigma strigosum

Cited by 64 publications

References 23 publications

Source identification of the Arctic sea ice proxy IP25

Source identification of the Arctic sea ice proxy IP25

Exploring Valuable Lipids in Diatoms

Photo- and Free Radical-Mediated Oxidation of Lipid Components During the Senescence of Phototrophic Organisms

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