Lignin biogeochemistry: from modern processes to Quaternary archives

Jex, Catherine N.; Pate, Gary H.; Blyth, Alison J.; Spencer, Robert G. M.; Hernes, Peter J.; Khan, Stuart J.; Baker, Andy

doi:10.1016/j.quascirev.2013.12.028

Cited by 118 publications

(107 citation statements)

References 124 publications

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“…3de), which indicates that polysaccharides are also degraded during long-548 term anaerobic decay, while lignin is not mineralised anaerobically (Jex et al, 2014). The 549 plants (Table 1) (Fig.…”

Section: Lignin and Polysaccharides 530mentioning

confidence: 97%

“…<1% of the total 287 quantified pyrolysis products) can be considered as statistically independent, a large number of 288 pyrolysis products have to be quantified to reach this independence. An alternative to the 289 quantification of large data sets is the use of ratios; frequently applied examples from lignin 290 geochemistry include syringyl to guaiacyl and acid to aldehyde ratios (Jex et al, 2014). In 291 relation to analytical pyrolysis, the advantage of using ratios is that quantification is simple and 292 data sets can be compared.…”

Section: Carbon and Nitrogen 229mentioning

confidence: 99%

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Preferential degradation of polyphenols from Sphagnum – 4-Isopropenylphenol as a proxy for past hydrological conditions in Sphagnum-dominated peat

Schellekens

Bindler

Cortizas

et al. 2015

Geochimica et Cosmochimica Acta

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Section: Lignin and Polysaccharides 530mentioning

confidence: 97%

Section: Carbon and Nitrogen 229mentioning

confidence: 99%

Preferential degradation of polyphenols from Sphagnum – 4-Isopropenylphenol as a proxy for past hydrological conditions in Sphagnum-dominated peat

Schellekens

Bindler

Cortizas

et al. 2015

Geochimica et Cosmochimica Acta

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“…When considered together, S:V and C:V ratios indicate plant tissue origin (Hedges and Mann 1979;Goñi et al 1998), while the state of oxidative degradation is indicated by the ratio of acid to aldehyde phenols in both the vanillyl [(Ad/Al) V ] and syringyl [(Ad/Al) S ] groups (Jex et al 2014).…”

Section: Laboratory Analysesmentioning

confidence: 99%

Photodegraded dissolved organic matter from peak freshet river discharge as a substrate for bacterial production in a lake-rich great Arctic delta

Gareis

Lesack

2018

Arctic Science

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Lake-rich Arctic river deltas are recharged with terrigenous dissolved organic matter (DOM) during the yearly peak water period corresponding with the solstice (24 h day −1 solar irradiance). Bacteria-free DOM collected during peak Mackenzie River discharge was exposed to sunlight for up to 14 days in June 2010. As solar exposure increased, carbon and lignin concentrations declined (10% and 42%, respectively, after 14 days), as did DOM absorptivity (62% after 14 days), aromaticity, and molecular weight. Photochemical changes were on par with those normally observed in Mackenzie Delta lakes over the entire open-water season. When irradiated freshet DOM was provided as a substrate, no significant differences were observed in community-level metabolism among five bacterial communities from representative delta habitats. However, bacterial abundance was significantly greater when nonirradiated (0 day) rather than irradiated DOM (7 or 14 days) was provided, while cell-specific metabolic measures revealed that per-cell bacterial production and growth efficiency were significantly greater when communities were provided irradiated substrate. This complex response to rapid DOM photodegradation may result from the production of inhibitory reactive oxygen species (ROS), along with shifts in bacterial community composition to species that are better able to tolerate ROS, or metabolize the labile photodegraded DOM.Key words: circumpolar river delta, photodegradation, dissolved organic matter, bacterial metabolism, Mackenzie River.Résumé : Les deltas arctiques riches en lacs sont rechargés en matière organique dissoute (MOD) terrigène pendant la période annuelle de crue maximale correspondant au solstice (irradiance solaire 24 h jour −1 ). De la MOD sans bactéries collectée durant la pointe de crue du fleuve Mackenzie a été exposée à la lumière du soleil pendant 14 jours en juin 2010. À mesure que l'exposition solaire se prolongeait, les concentrations de carbone et lignine diminuaient (10 % et 42 % respectivement, après 14 jours), tout comme le pouvoir d'absorption de la MOD (62 % après 14 jours), son aromaticité et son poids moléculaire. Les changements photochimiques correspondaient à ceux normalement observés dans les lacs du delta du Mackenzie sur l'ensemble de la saison des eaux libres. Lorsque de la MOD de crue irradiée fut utilisée comme substrat, aucune différence significative n'a été observée quant au métabolisme au niveau de la communauté en comparant cinq communautés bactériennes issues d'habitats représentatifs du delta. Néanmoins, l'abondance de bactéries était considérablement plus grande lorsque de la For personal use only.MOD non irradiée (0 jour) a été fournie au lieu de la MOD irradiée (7 ou 14 jours), tandis que les mesures de l'activité métabolique spécifique aux cellules ont révélé que la production bactérienne par cellule et le rendement de croissance étaient considér-ablement plus élevés lorsque les communautés avaient accès au substrat irradié. Cette réaction complexe à la photodégradation...

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“…As ligninas são polifenóis bioquímicos de plantas vasculares presentes em ambientes terrestres, cuja oxidação desse material vegetal produz uma série de fenóis simples com padrões de substituição característicos (Hedges et al 1984;Ghaffar et al 2014;Jex et al 2014). A quantidade de lignina varia de 15 a 40% na parede celular das plantas, e tem papel importante no transporte de água, na proteção contra ataque biológico e atua na rigidez e resistência da parede celular (Ghaffar et al 2014;Jex et al 2014).…”

Section: Substâncias Húmicas De Solounclassified

“…A quantidade de lignina varia de 15 a 40% na parede celular das plantas, e tem papel importante no transporte de água, na proteção contra ataque biológico e atua na rigidez e resistência da parede celular (Ghaffar et al 2014;Jex et al 2014).…”

Section: Substâncias Húmicas De Solounclassified

Gênesis de espodossolos amazônicos: um estudo sobre a estrutura e a mobilidade da matéria orgânica

Tadini¹

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Lignin biogeochemistry: from modern processes to Quaternary archives

Cited by 118 publications

References 124 publications

Preferential degradation of polyphenols from Sphagnum – 4-Isopropenylphenol as a proxy for past hydrological conditions in Sphagnum-dominated peat

Preferential degradation of polyphenols from Sphagnum – 4-Isopropenylphenol as a proxy for past hydrological conditions in Sphagnum-dominated peat

Photodegraded dissolved organic matter from peak freshet river discharge as a substrate for bacterial production in a lake-rich great Arctic delta

Gênesis de espodossolos amazônicos: um estudo sobre a estrutura e a mobilidade da matéria orgânica

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