Arbuscular mycorrhizal mycelial respiration in a moist tropical forest

Nottingham, Andrew T.; Turner, Benjamín L.; Winter, Klaus; Heijden, Marcel G. A. van der; Tanner, E. V. J.

doi:10.1111/j.1469-8137.2010.03226.x

Cited by 71 publications

(73 citation statements)

References 48 publications

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“…The increased CO 2 emissions in the M treatments confirm other studies (Grimoldi et al, 2006;Nottingham et al, 2010;Cheng et al, 2012) showing that AMF enhance CO 2 emissions from soil and suggest that C cycling was modified by AMF (Drigo et al, 2010). AMF-induced shifts in C allocation into the soil can modify soil bacterial community composition (Toljander et al, 2007) and could also provide an explanation for the observed changes in the denitrifying communities, as suggested by Veresoglou et al (2012b).…”

Section: Discussionsupporting

confidence: 77%

Symbiotic relationships between soil fungi and plants reduce N2O emissions from soil

et al. 2013

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N 2 O is a potent greenhouse gas involved in the destruction of the protective ozone layer in the stratosphere and contributing to global warming. The ecological processes regulating its emissions from soil are still poorly understood. Here, we show that the presence of arbuscular mycorrhizal fungi (AMF), a dominant group of soil fungi, which form symbiotic associations with the majority of land plants and which influence a range of important ecosystem functions, can induce a reduction in N 2 O emissions from soil. To test for a functional relationship between AMF and N 2 O emissions, we manipulated the abundance of AMF in two independent greenhouse experiments using two different approaches (sterilized and re-inoculated soil and non-mycorrhizal tomato mutants) and two different soils. N 2 O emissions were increased by 42 and 33% in microcosms with reduced AMF abundance compared to microcosms with a well-established AMF community, suggesting that AMF regulate N 2 O emissions. This could partly be explained by increased N immobilization into microbial or plant biomass, reduced concentrations of mineral soil N as a substrate for N 2 O emission and altered water relations. Moreover, the abundance of key genes responsible for N 2 O production (nirK) was negatively and for N 2 O consumption (nosZ) positively correlated to AMF abundance, indicating that the regulation of N 2 O emissions is transmitted by AMF-induced changes in the soil microbial community. Our results suggest that the disruption of the AMF symbiosis through intensification of agricultural practices may further contribute to increased N 2 O emissions.

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Section: Discussionsupporting

confidence: 77%

Symbiotic relationships between soil fungi and plants reduce N2O emissions from soil

et al. 2013

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“…Nottingham et al. (2010) found that 40% of root respiration in the tropical tree Pseudobombax septenatum was attributable to AMF extraradical mycelium. Peng et al.…”

Section: Discussionmentioning

confidence: 99%

Influence of arbuscular mycorrhizal colonization on whole‐plant respiration and thermal acclimation of tropical tree seedlings

Fahey

Winter

Slot

et al. 2016

Ecology and Evolution

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Symbiotic arbuscular mycorrhizal fungi (AMF) are ubiquitous in tropical forests. AMF play a role in the forest carbon cycle because they can increase nutrient acquisition and biomass of host plants, but also incur a carbon cost to the plant. Through their interactions with their host plants they have the potential to affect how plants respond to environmental perturbation such as global warming. Our objective was to experimentally determine how plant respiration rates and responses to warmer environment are affected by AMF colonization in seedlings of five tropical tree species at the whole plant level. We evaluated the interaction between AMF colonization and temperature on plant respiration against four possible outcomes; acclimation does or does not occur regardless of AMF, or AMF can increase or decrease respiratory acclimation. Seedlings were inoculated with AMF spores or sterilized inoculum and grown at ambient or elevated nighttime temperature. We measured whole plant and belowground respiration rates, as well as plant growth and biomass allocation. There was an overall increase in whole plant, root, and shoot respiration rate with AMF colonization, whereas temperature acclimation varied among species, showing support for three of the four possible responses. The influence of AMF colonization on growth and allocation also varied among plant species. This study shows that the effect of AMF colonization on acclimation differs among plant species. Given the cosmopolitan nature of AMF and the importance of plant acclimation for predicting climate feedbacks a better understanding of the patterns and mechanisms of acclimation is essential for improving predictions of how climate warming may influence vegetation feedbacks.

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“…Moyano et al (2008) suggested that factors controlling mycorrhizal respiration are similar to those that control root respiration. However, recent studies indicate that mycorrhizal respiration may be less sensitive to temperature than root respiration (Heinemeyer et al, 2007;Moyano et al, 2007;Nottingham et al, 2010).…”

Section: Rhizosphere Respirationmentioning

confidence: 99%

Carbon allocation and carbon isotope fluxes in the plant-soil-atmosphere continuum: a review

Brüggemann¹,

et al. 2011

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Abstract. The terrestrial carbon (C) cycle has received increasing interest over the past few decades, however, there is still a lack of understanding of the fate of newly assimilated C allocated within plants and to the soil, stored within ecosystems and lost to the atmosphere. Stable carbon isotope studies can give novel insights into these issues. In this review we provide an overview of an emerging picture of plant-soil-atmosphere C fluxes, as based on C isotopeCorrespondence to: N. Brüggemann (n.brueggemann@fz-juelich.de) studies, and identify processes determining related C isotope signatures. The first part of the review focuses on isotopic fractionation processes within plants during and after photosynthesis. The second major part elaborates on plantinternal and plant-rhizosphere C allocation patterns at different time scales (diel, seasonal, interannual), including the speed of C transfer and time lags in the coupling of assimilation and respiration, as well as the magnitude and controls of plant-soil C allocation and respiratory fluxes. Plant responses to changing environmental conditions, the functional relationship between the physiological and phenological status of plants and C transfer, and interactions between Published by Copernicus Publications on behalf of the European Geosciences Union. 3458 N. Brüggemann et al.: Plant-soil-atmosphere C fluxes C, water and nutrient dynamics are discussed. The role of the C counterflow from the rhizosphere to the aboveground parts of the plants, e.g. via CO 2 dissolved in the xylem water or as xylem-transported sugars, is highlighted. The third part is centered around belowground C turnover, focusing especially on above-and belowground litter inputs, soil organic matter formation and turnover, production and loss of dissolved organic C, soil respiration and CO 2 fixation by soil microbes. Furthermore, plant controls on microbial communities and activity via exudates and litter production as well as microbial community effects on C mineralization are reviewed. A further part of the paper is dedicated to physical interactions between soil CO 2 and the soil matrix, such as CO 2 diffusion and dissolution processes within the soil profile. Finally, we highlight state-of-the-art stable isotope methodologies and their latest developments. From the presented evidence we conclude that there exists a tight coupling of physical, chemical and biological processes involved in C cycling and C isotope fluxes in the plant-soil-atmosphere system. Generally, research using information from C isotopes allows an integrated view of the different processes involved. However, complex interactions among the range of processes complicate or currently impede the interpretation of isotopic signals in CO 2 or organic compounds at the plant and ecosystem level. This review tries to identify present knowledge gaps in correctly interpreting carbon stable isotope signals in the plant-soil-atmosphere system and how future research approaches could contribute to closing these gaps.

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Arbuscular mycorrhizal mycelial respiration in a moist tropical forest

Cited by 71 publications

References 48 publications

Symbiotic relationships between soil fungi and plants reduce N2O emissions from soil

Symbiotic relationships between soil fungi and plants reduce N2O emissions from soil

Influence of arbuscular mycorrhizal colonization on whole‐plant respiration and thermal acclimation of tropical tree seedlings

Carbon allocation and carbon isotope fluxes in the plant-soil-atmosphere continuum: a review

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