The effects of high-tannin leaf litter from transgenic poplars on microbial communities in microcosm soils

Winder, Richard S.; Lamarche, Josyanne; Constabel, C. Peter; Hamelin, Richard

doi:10.3389/fmicb.2013.00290

Cited by 34 publications

(25 citation statements)

References 75 publications

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“…This explanation is consistent with the relatively high fungal biomass and low bacterial biomass measured in soils under P. cuspidatum. High concentrations of tannins may also favour fungi over bacteria in soil (Winder et al 2013). Although this study was not able to test for change in bacterial community composition, introduced plants can cause such changes (Yannarell et al 2011;Silva et al 2013), and P. cuspidatum is reported to alter the activity of soil denitrifying bacteria (Dassonville et al 2011;Bardon et al 2014).…”

Section: O N T R a S T B E T W E E N L I T T E R A N D S O I L C H mentioning

confidence: 85%

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Plant–soil interactions regulate the identity of soil carbon in invaded ecosystems: implication for legacy effects

et al. 2015

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Summary Introduced, invasive plants can alter local soil chemistry and microbial communities, but the underlying mechanisms and extent of these changes are largely unknown. Based on characteristics associated with invasiveness in plants, it was hypothesized that introduced species that produce large amounts of litter with distinctive secondary compounds can a) alter the chemistry of both extractable and bulk carbon in the soil, b) shift microbial communities towards microbes better able to metabolize the compounds in the litter and c) cause soil carbon chemistry and microbial communities to shift to relatively uniform, novel states at multiple sites. Composition of phenolics in senescent tissues (leaves and roots) of Polygonum cuspidatum was compared to the composition of extractable phenolics and non‐extractable bulk organic carbon in soils under and adjacent to large, long‐established stands of P. cuspidatum at four sites in the eastern U.S. Rates of degradation of phenolics, activities of enzymes associated with the breakdown of phenolics and shifts in microbial community composition were also measured at the sites. Soils under P. cuspidatum stands contained twice as much phenolics as adjacent soils, but the composition of phenolics differed greatly between soils under stands and senescent tissues of P. cuspidatum. Flavonoids and proanthocyanidins constituted >90% of the identified phenolics in P. cuspidatum tissues, whereas monophenolic compounds accounted for >90% of the phenolics in soils under stands. Soils under and adjacent to stands also exhibited distinctive compositions of relatively persistent bulk organic carbon; composition differed less between soils under stands at different sites than between soils under and adjacent to stands at the same site. Soils under P. cuspidatum had 2·8 times greater abundance of fungi than soils adjacent to stands, and fungal markers showed clear separation of soils under and adjacent to P. cuspidatum. However, the potential activity of enzymes that degrade polyphenols was lower in soils under stands. Exogenously applied, chemically complex polyphenols persisted in both P. cuspidatum‐invaded and adjacent non‐invaded soils, whereas less complex compounds rapidly disappeared from both soils. Synthesis. Results suggest that interactions between plant inputs, abiotic reactions and biotic transformations may create and maintain new states in invaded soils that are chemically and biologically less diverse. In the case of polyphenol‐rich, fast‐growing invasive species, these interactions may alter the composition of bulk soil organic matter that has relatively slower turnover rates, resulting in legacy effects. Restoration could thus require, not just removal of the species, but also post‐removal interventions such as soil amendments.

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Section: O N T R a S T B E T W E E N L I T T E R A N D S O I L C H mentioning

confidence: 85%

“…High concentrations of tannins may also favour fungi over bacteria in soil (Winder et al . ). Although this study was not able to test for change in bacterial community composition, introduced plants can cause such changes (Yannarell et al .…”

Section: Discussionmentioning

confidence: 97%

Plant–soil interactions regulate the identity of soil carbon in invaded ecosystems: implication for legacy effects

et al. 2015

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“…The property of accumulating iron and aluminum in tea and tea plantation soils (Ruan et al, 2003), and the higher concentration of phosphorus in tea leaf litter (2.04-2.09 mg/g) than in forest leaf litter, indirectly confirmed the combination of polyphenols and phosphorus. In addition, the stimulation of polyphenols on microbial activity is not well known (Schmidt et al, 2013;Winder et al, 2013). Further investigation is required to determine the genuine function of polyphenols in tea leaf decomposition and the interaction between them and other factors.…”

Section: Role Of Polyphenol In the Short-term Decomposition Of Tea Lementioning

confidence: 99%

Tea polyphenols dominate the short-term tea (Camellia sinensis) leaf litter decomposition

Fan

Cuiping³

et al. 2017

J. Zhejiang Univ. Sci. B

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Polyphenols are one of the most important secondary metabolites, and affect the decomposition of litter and soil organic matter. This study aims to monitor the mass loss rate of tea leaf litter and nutrient release pattern, and investigate the role of tea polyphenols played in this process. High-performance liquid chromatography (HPLC) and classical litter bag method were used to simulate the decomposition process of tea leaf litter and track the changes occurring in major polyphenols over eight months. The release patterns of nitrogen, potassium, calcium, and magnesium were also determined. The decomposition pattern of tea leaf litter could be described by a two-phase decomposition model, and the polyphenol/N ratio effectively regulated the degradation process. Most of the catechins decreased dramatically within two months; gallic acid (GA), catechin gallate (CG), and gallocatechin (GC) were faintly detected, while others were outside the detection limits by the end of the experiment. These results demonstrated that tea polyphenols transformed quickly and catechins had an effect on the individual conversion rate. The nutrient release pattern was different from other plants which might be due to the existence of tea polyphenols.

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“…The composition of secondary carbon compounds, e.g., tannins, which regulate microbial N-cycling [40], water deficit or excess, controlling the intensity of gaseous N-losses due to denitrification, should be taken into account. The impact of soil type, i.e., the composition of the microbial community decomposing aspen litter may also affect nitrogen and other nutrients' availability during the decomposition process and are to be investigated in the course of future studies.…”

Section: Discussionmentioning

confidence: 99%

Decomposition of Leaves, Stems and Roots of Transgenic Aspen with the Xyloglucanase (sp-Xeg) Gene under Laboratory Microcosm Conditions

et al. 2016

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Abstract:The genetic transformation of trees by wood modification genes for the improvement of forest plantations results in shifts in plant litter quality. These alterations in plant chemistry lead to changes in decomposition rates, thus affecting the carbon and nitrogen cycling in ecosystems and nutrient availability for plants. To assess the environmental impacts of transgenic trees, we studied the decomposition of plant litter from aspen plants (Populus tremula L.) transformed with the xyloglucanase gene from Penicillium canescens. Mass, carbon and nitrogen losses in the leaves, stems and roots of greenhouse-grown plants were evaluated during incubation in laboratory microcosms. After 12 months of the decomposition experiment, leaves, stems, and roots lost on average 51%, 46%, and 37% of initial mass, respectively. Decomposition of the transgenic stems was not different from wild-type aspen, but we observed significant differences for the leaves (only at the end of the experiment) and the roots (at the early stage). These differences may be related to the nitrogen content and the C/N ratio in the initial samples. Since the litter decomposability determines the availability of nutrients, such alterations should be taken into consideration when cultivating transgenic trees.

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The effects of high-tannin leaf litter from transgenic poplars on microbial communities in microcosm soils

Cited by 34 publications

References 75 publications

Plant–soil interactions regulate the identity of soil carbon in invaded ecosystems: implication for legacy effects

Plant–soil interactions regulate the identity of soil carbon in invaded ecosystems: implication for legacy effects

Tea polyphenols dominate the short-term tea (Camellia sinensis) leaf litter decomposition

Decomposition of Leaves, Stems and Roots of Transgenic Aspen with the Xyloglucanase (sp-Xeg) Gene under Laboratory Microcosm Conditions

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