Increased plant productivity and decreased microbial respiratory C loss by plant growth-promoting rhizobacteria under elevated CO2

Nie, Ming; Bell, Colin W.; Wallenstein, Matthew D.; Pendall, Elise

doi:10.1038/srep09212

Cited by 67 publications

(46 citation statements)

References 53 publications

(87 reference statements)

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“…Together with the negative responses of SR following the fires, our results suggest that increases in ER post-fire were mainly the result of strong positive responses of aboveground plant respiration (R agb ) that were related to the accumulation of (Luo & Zhou, 2006). Because of the initial large plant productivity following fire treatment, plant growth respiration was probably large (Nie, Bell, Wallenstein, & Pendall, 2015). This contention is supported by the positive correlation between gross plant productivity and R agb .…”

Section: Factors Affecting the Responses Of Ecosystem Respiration Amentioning

confidence: 89%

“…Changes in R agb can be affected by plant growth and maintenance respiration (Luo & Zhou, ). Because of the initial large plant productivity following fire treatment, plant growth respiration was probably large (Nie, Bell, Wallenstein, & Pendall, ). This contention is supported by the positive correlation between gross plant productivity and R agb .…”

Section: Discussionmentioning

confidence: 99%

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Contrasting responses after fires of the source components of soil respiration and ecosystem respiration

Chen

Zhang

Luo

et al. 2019

European J Soil Science

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Wildfire is an important ecological disturbance that can have cascading effects on ecosystem carbon (C) fluxes. Ecosystem respiration (ER) and soil respiration (SR) account for two of the largest terrestrial C fluxes to the atmosphere, and they play critical roles in regulating C–climate feedbacks. Here, the responses of ER, SR and their source components to experimental burning in a meadow grassland on the Tibetan Plateau were investigated. Fire treatment increased ER by 9% but decreased SR by 15%. The contrasting post‐fire responses of SR and ER can be explained by the behaviour of their source components; that is, fire increased aboveground plant respiration (Ragb) by 37%, but decreased heterotrophic respiration (HR) by 21%. Increases in ER and Ragb were mainly related to enhanced plant productivity, whereas smaller SR and HR were associated with reductions in microbial biomass and soil moisture. Accounting for the responses of ER, SR and their intrinsic components has advanced our understanding of how fire affects ecosystem C fluxes. Highlights Fire treatment increased ecosystem respiration (ER) and aboveground plant respiration. Fire treatment decreased soil respiration (SR) and heterotrophic respiration (HR). Increases in ER and aboveground plant respiration were related to plant productivity. Reductions in SR and HR were caused by the suppressed microbial activity.

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Section: Factors Affecting the Responses Of Ecosystem Respiration Amentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Contrasting responses after fires of the source components of soil respiration and ecosystem respiration

Chen

Zhang

Luo

et al. 2019

European J Soil Science

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“…The potential of PGPRs for improving terrestrial carbon storage through increasing plant productivity and decreasing microbial respiratory carbon loss under rising atmospheric CO 2 condition has been described (Nie et al, 2015). Thus, it is possible that elevated atmospheric CO 2 levels under future climate scenarios will increase the dominance of PGPRs.…”

Section: Elevated Co 2 Levelsmentioning

confidence: 99%

Rhizosphere engineering: Enhancing sustainable plant ecosystem productivity

White²,

et al. 2017

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The rhizosphere is arguably the most complex microbial habitat on earth, comprising an integrated network of plant roots, soil and a diverse microbial consortium of bacteria, archaea, viruses, and microeukaryotes. Understanding, predicting and controlling the structure and function of the rhizosphere will allow us to harness plantmicrobe interactions and other rhizosphere activities as a means to increase or restore plant ecosystem productivity, improve plant responses to a wide range of environmental perturbations, and mitigate effects of climate change by designing ecosystems for longterm soil carbon storage. Here, we review critical knowledge gaps in rhizosphere 2 science, and how mechanistic understanding of rhizosphere interactions can be leveraged in rhizosphere engineering efforts with the goal of maintaining sustainable plant ecosystem services for food and bioenergy production in an ever changing global climate.

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“…In addition, N deposition levels are higher on average in the native range of T. sebifera (Liu et al, 2013) than those in the invasive range (Thomas et al, 2010). Alteration of plant root morphology and production as well as stimulation of soil microbial community by elevated CO 2 and N deposition have been reported (Lipson et al, 2014;Dawes et al, 2015;Liu et al, 2015;Nie et al, 2015). Therefore, CO 2 and N could impact litter quality, growth and mass allocation, which might further regulate the litter decomposition process associated with C and nutrient release.…”

Section: Effectmentioning

confidence: 99%

Interactive effects of elevated CO2 and nitrogen deposition accelerate litter decomposition cycles of invasive tree (Triadica sebifera)

Zhang

Zou

Siemann

2017

Forest Ecology and Management

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a b s t r a c tLitter decomposition is an important component of forest nutrient recycling potentially impacted by elevated CO 2 , nitrogen (N) deposition, and biological invasions. Each can affect decomposition indirectly via changes in litter quantity, litter quality, and soils, which may increase or offset direct effects of elevated CO 2 on decomposition. To date, no study has examined how elevated CO 2 and N deposition interact to determine exotic plant litter cycling or the importance of variation among native and invasive populations of exotic plants for these effects.In this study, we examine elevated CO 2 and N deposition effects on litter production and decomposition of native (China) and invasive (USA) populations of tallow tree (Triadica sebifera). First, we investigated litter production in greenhouse chambers. Then, we conducted three additional experiments using experimentally created litter and soils to examine CO 2 and N effects on litter decomposition via changes in litter quality, soils, and atmospheric environment. Elevated CO 2 and N deposition increased litter production with their combined effects more than additive. Nitrogen deposition increased litter production of native populations more than that of invasive populations. Litter produced in elevated CO 2 had higher C:N and decomposed more slowly than litter produced in ambient CO 2 but N deposition weakened these effects. Decomposition was slower in soils with histories of N deposition or plant association. Elevated CO 2 had no direct effects on litter decomposition.The net effect of elevated CO 2 alone on litter decomposition throughputs was negative for invasive populations due to strong reductions in litter decomposability. The net effect of elevated CO 2 and N deposition together on litter throughputs was positive, especially for native populations due to strong litter production increases.Results suggest that elevated CO 2 and N deposition impact litter cycling primarily through changes in litter quantity and quality with smaller effects via soils. Elevated CO 2 and N deposition had strong positive effects on litter throughputs together due to synergistic positive effects on litter production and offsetting effects on decomposability. Although elevated CO 2 and N deposition had consistent effects on native and invasive populations, the relative magnitudes of their effects on litter quantity and quality impacted litter cycling, suggesting the importance of considering plant trait variation in an overall estimation of global change effects on nutrient dynamics in forests and other ecosystems.

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Increased plant productivity and decreased microbial respiratory C loss by plant growth-promoting rhizobacteria under elevated CO2

Cited by 67 publications

References 53 publications

Contrasting responses after fires of the source components of soil respiration and ecosystem respiration

Contrasting responses after fires of the source components of soil respiration and ecosystem respiration

Rhizosphere engineering: Enhancing sustainable plant ecosystem productivity

Interactive effects of elevated CO2 and nitrogen deposition accelerate litter decomposition cycles of invasive tree (Triadica sebifera)

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