Plant-derived lipids play a crucial role in forest soil carbon accumulation

Dai, Guohua; Zhu, Shanshan; Cai, Yue; E, Zhu; Jia, Yufu; Ji, Chengjun; Tang, Zhiyao; Fang, Jingyun; Feng, Xiaojuan

doi:10.1016/j.soilbio.2022.108645

Cited by 33 publications

(16 citation statements)

References 64 publications

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“…Figure 3c) was significantly lower than in paddy soils (28%-39%) (Chen et al, 2021;Xia et al, 2019), forest soils (34%-60%) (Shao et al, 2017) and grassland soils (34%-53%) (Ma et al, 2018;Yang et al, 2022), implying that the formation of SOC coastal wetland differs from terrestrial ecosystems (Dai et al, 2022). It should be noted that these extrapolations (based on amino sugars) come with limitations as they only consider the contribution of microbial cell debris to the soil, ignoring the substantial contribution of extracellular microbial products, such as enzymes and metabolites, to SOC (Whalen et al, 2022).…”

Section: Contributions Of Plant-based and Microbial-derived Component...mentioning

confidence: 85%

“…To compare with previous findings in other ecosystems, we conducted additional calculations to determine the contribution of the plant and microbial component to SOC using the methodologies employed in those studies (Figure S8). The results showed that the contribution of microbial‐derived C to SOC in mangroves (16%–26%; Figure 3c) was significantly lower than in paddy soils (28%–39%) (Chen et al., 2021; Xia et al., 2019), forest soils (34%–60%) (Shao et al., 2017) and grassland soils (34%–53%) (Ma et al., 2018; Yang et al., 2022), implying that the formation of SOC coastal wetland differs from terrestrial ecosystems (Dai et al., 2022). It should be noted that these extrapolations (based on amino sugars) come with limitations as they only consider the contribution of microbial cell debris to the soil, ignoring the substantial contribution of extracellular microbial products, such as enzymes and metabolites, to SOC (Whalen et al., 2022).…”

Section: Discussionmentioning

confidence: 98%

“…Plant‐derived lignin phenols have been extensively used to evaluate the degree of lignin decomposition (Otto & Simpson, 2006). For example, the reduction in S/V and C/V ratios indicated that microbial transformation had reached an advanced stage (Dai et al., 2022; Zhu et al., 2019). In this study, no clear patterns were found in the soil profile with mangrove restoration (Figures S5 and S6).…”

Section: Discussionmentioning

confidence: 99%

“…As the primary energy source for microbes, the input of plant C can be converted into microbial necromass through microbial processing and assimilation (Dai et al., 2022). The mineral matrix of the soil can protect the microbial necromass from decomposition, making it more robust than plant‐based substances (Angst et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

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Contributions of plant‐ and microbial‐derived residuals to mangrove soil carbon stocks: Implications for blue carbon sequestration

Qin,

He,

Sanders

et al. 2024

Functional Ecology

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Coastal blue carbon ecosystems, particularly mangroves, are becoming increasingly recognised for their importance in mitigating climate change. Still, the specific patterns and drivers of plant lignin components and microbial necromass accumulation in these ecosystems are unclear. In response, we carried out a study along a 40‐year mangrove restoration chronosequence, measuring lignin phenol and amino sugar concentrations in soil profiles (0–100 cm) as indicators of plant‐based and microbial‐derived residues, respectively. Our results showed that restoration significantly increased plant lignin phenol and amino sugar concentrations, with mature mangroves having much higher concentrations than tidal flats. During restoration, the fungal necromass was greater than the bacterial necromass. The factors influencing the lignin phenols were tree biomass, total nitrogen, pH and salinity, while those influencing the formation of amino sugars were total biomass, soil C: N ratio and pH. While the amino sugars decreased, the lignin phenols increased with the content of SOC, providing evidence of the important role lignin phenol components play in the formation of SOC in mangrove. Synthesis: By separating soil carbon into plant‐based and microbial‐derived components, our results demonstrate that the carbon stock in mangrove sediments is vulnerable to disturbances and that changes from anaerobic to aerobic conditions cause significant carbon mineralisation. The precise identification of soil carbon sources in blue carbon ecosystems could aid in elucidating the mechanisms of soil carbon sequestration and their responses to environmental changes. Read the free Plain Language Summary for this article on the Journal blog.

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Section: Contributions Of Plant-based and Microbial-derived Component...mentioning

confidence: 85%

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Contributions of plant‐ and microbial‐derived residuals to mangrove soil carbon stocks: Implications for blue carbon sequestration

Qin,

He,

Sanders

et al. 2024

Functional Ecology

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“…Another example of slow‐cycled C‐rich molecules microbial by‐products are membrane lipids, which disproportionately contribute to slow‐cycled C pools in soil (Dai et al, 2022; Malik et al, 2015) due to their poor solubility and sorption to solid phases (Pei et al, 2022). Microbial lipids are markers of long‐term C accumulation in forests (Shao et al, 2019), with one study reporting a 280% increase in relative abundance of a lipid‐rich yeast, Solicoccozyma , corresponding to a 2‐fold increase in C stocks in forest soils (Sridhar et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Can we manage microbial systems to enhance carbon storage?

Mahmoudi

Wilhelm

2023

Environmental Microbiology

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Climate change is an urgent environmental issue with wide‐ranging impacts on ecosystems and society. Microbes are instrumental in maintaining the balance between carbon (C) accumulation and loss in the biosphere, actively regulating greenhouse gas fluxes from vast reservoirs of organic C stored in soils, sediments and oceans. Heterotrophic microbes exhibit varying capacities to access, degrade and metabolise organic C—leading to variations in remineralisation and turnover rates. The present challenge lies in effectively translating this accumulated knowledge into strategies that effectively steer the fate of organic C towards prolonged sequestration. In this article, we discuss three ecological scenarios that offer potential avenues for shaping C turnover rates in the environment. Specifically, we explore the promotion of slow‐cycling microbial byproducts, the facilitation of higher carbon use efficiency, and the influence of biotic interactions. The ability to harness and control these processes relies on the integration of ecological principles and management practices, combined with advances in economically viable technologies to effectively manage microbial systems in the environment.

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Turnover of non-polymeric leaf lipids in a loamy grassland soil

Warren

Butler

2023

Plant Soil

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Background Leaves constitute a large input of lipids to soil, yet comparatively little is known about the fate of leaf lipids in soil. Our aim was to explore the initial stages of degradation of leaf lipids, both the loss of intact lipid and subsequent mineralisation. We focussed on intracellular lipids – triacylglycerols implicated in storage, membrane lipids such as phospholipids and galactolipids, and pigments – because they collectively constitute more than 1% of leaf mass. Methods A mixture of U-13C lipids was extracted from leaves of wheat grown with 13CO2. The lipid mixture included the range of plant lipids soluble in organic solvent (e.g. free fatty acids, acylglycerols, pigments) but not polymeric lipids such as cutin and suberin. Mineralisation was deduced from 13CO2 efflux, while LC–MS examined degradation of intact 13C lipids. Results There was no delay before lipids were mineralised. Instead, mineralisation was significant within minutes and reached a maximum within three hours. There was rapid loss (i.e. degradation) of a broad range of intact lipids including phospholipids, galactolipids, pigments (chlorophylls), and triacylglycerols. Around two-thirds of added lipid-C was respired over the course of 15 days, with one-third of lipid-C persisting in soil. Conclusions Our study indicates that non-polymeric leaf lipids degrade quickly in soil, yet a fraction of lipid-C likely persisted in degradation products and/or microbial biomass. Persistence of lipid-C probably also reflected the presence of lipids that are more resistant to degradation (e.g. phaeophytins), and a fraction of added lipid being protected (e.g. by interaction with clays). Graphical abstract

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Plant-derived lipids play a crucial role in forest soil carbon accumulation

Cited by 33 publications

References 64 publications

Contributions of plant‐ and microbial‐derived residuals to mangrove soil carbon stocks: Implications for blue carbon sequestration

Contributions of plant‐ and microbial‐derived residuals to mangrove soil carbon stocks: Implications for blue carbon sequestration

Can we manage microbial systems to enhance carbon storage?

Turnover of non-polymeric leaf lipids in a loamy grassland soil

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