Importance of root uptake of CO on C transfer to plants impacted by below-ground CH release.

07:00 EST 2nd February 2019 | BioPortfolio

Summary of "Importance of root uptake of CO on C transfer to plants impacted by below-ground CH release."

C-labelled methane (CH) released from deep underground radioactive waste disposal facilities can be a below-ground source of CO owing to microbial oxidation of CH to CO in soils. Environmental C models assume that the transfer of CO from soil to plant occurs via foliar uptake of CO. Nevertheless, the importance of CO root uptake is not well understood. In the present study, below-ground transport and oxidation of CH were modeled and incorporated into an existing land-surface CO model (SOLVEG-II) to assess the relative importance of root uptake and foliar uptake on CO transfer from soil to plants. Performance of the model in calculating the below-ground dynamics of CH was validated by simulating a field experiment of CH (as a substitute for CH) injection into subsoil in a wheat field in the UK. The proposed model simulation was then applied to C transfer in a hypothetical ecosystem impacted by continuous CH input from the water table (bottom of 1-m thick soil), which simulated continuous release of CH from a deep underground radioactive waste disposal facility. The contrast between the results obtained from the model calculation that assumed different distributions of roots (rooting depths of 11 cm, or 97 cm) and methane oxidation (characterized by e-folding depths of 5 cm, 20 cm, or 80 cm) in the soil provided insight into the relative importance of root uptake and foliar uptake pathways. In the shallowly rooted ecosystem with rooting depth of 11 cm, foliar uptake of CO was significant, accounting for 80% of the C accumulation (as organic C) in the plant (leaf compartment). By contrast, in a deeply rooted ecosystem (rooting depth of 97 cm), where the root penetrated to depths close to the water-table, more than half (63%) the C accumulated in the plant was transferred via the root uptake pathway. We found that CO root uptake (thus C accumulation in the plant) in this ecosystem depended on the distribution of methane oxidation in the soil; all C accumulated in the plant was transferred by the root uptake pathway when methane oxidation occurred at considerable depths (e-folding depths of 20 cm, or 80 cm) in the soil. The high level of CO root uptake was ascribed to the oxidation of added CH (i.e., production of CO) in the deep part of the soil and the subsequent high level of root uptake of the deep soil-water containing CO. These results indicate that CO root uptake contributes significantly to CO transfer to plants if CH oxidation occurs at great depths and roots penetrate deeply into the soil. It is recommended that current environmental C models must be refined to consider the importance of the root uptake pathway to ensure that dose estimates of CH release from deep underground waste disposal facilities are accurate.


Journal Details

This article was published in the following journal.

Name: Journal of environmental radioactivity
ISSN: 1879-1700
Pages: 5-18


DeepDyve research library

PubMed Articles [14752 Associated PubMed Articles listed on BioPortfolio]

Discerning the sources of silver nanoparticle in a terrestrial food chain by stable isotope tracer technique.

The increasing use of silver-containing nanoparticles (NPs) in commercial products has led to NP accumulation in the environment and potentially in food webs. Identifying the uptake pathways of differ...

A framework for assessing the effects of afforestation and South-to-North Water Transfer on nitrogen and phosphorus uptake by plants in a critical riparian zone.

The uptake of nitrogen (N) and phosphorus (P) by plants in riparian zones can significantly decrease the water pollution risk. Moreover, the vegetation area in riparian zone can be impacted by raising...

Impacts of arbuscular mycorrhizal fungi on nutrient uptake, N2 fixation, N transfer, and growth in a wheat/faba bean intercropping system.

Arbuscular mycorrhizal fungi (AMF) can play a key role in natural and agricultural ecosystems affecting plant nutrition, soil biological activity and modifying the availability of nutrients by plants....

Influence of Humic Acid on Pb Uptake and Accumulation in Tea Plants.

Hydroponic experiment combined with Synchronous Radiation X-ray fluorescence (SRXRF) analysis was designed to understand the influence of humic acid (HA) in tea plants under lead stress. Results showe...

Differential carbon allocation to nitrogen-rich patches in Poa annua precedes root proliferation but has no immediate benefit to N uptake.

Nutrients are heterogeneously distributed in the soil environment. Plants have evolved a variety of mechanisms to maximise their ability to compete for limited resources, with differential root growth...

Clinical Trials [3110 Associated Clinical Trials listed on BioPortfolio]

Preparing and Timing of the Endometrium in Modified Natural Cycle Frozen-thawed Embryo Transfers

The increasing use of FET emphasizes the importance of preparing and timing the endometrium in FET cycles, however there is no consensus on luteal phase progesterone supplementation in mNC...

Spices Inhibit the Formation and Absorption of Malondialdehyde From Hamburger Meat

Polyphenols belong to the largest group of secondary metabolites produced by plants, mainly, in response to biotic or abiotic stresses such as infections, wounding, UV irradiation, exposur...

Effects of Ground Level Gait Training With Body Weight Support (BWS) and Functional Electrical Stimulation (FES)

The aim of this study was to investigate the effects of gait training on ground level, combining BWS and FES in people following chronic stroke.

Effects of a Spiced Meat Patty on Inflammation in Men With Type 2 Diabetes

Polyphenols belong to the largest group of secondary metabolites produced by plants, mainly, in response to biotic or abiotic stresses such as infections, wounding, UV irradiation, exposur...

Correlation Between Root Resorption and Dentin Sialoprotein Upon Application of Different Orthodontic Forces.

Since root resorption is a frequent consequence of orthodontic treatment, DSP are non-collagenous dentin-specific matrix proteins postulated to be involved in the mineralization of pre-den...

Medical and Biotech [MESH] Definitions

A genus of gram-negative, rod-shaped bacteria in the family PHYLLOBACTERIACEAE. They are able to invade root-hairs of a wide range of plants, inciting the production of PLANT ROOT NODULES.

A cone-shaped structure in plants made up of a mass of meristematic cells that covers and protects the tip of a growing root. It is the putative site of gravity sensing in plant roots.

Drugs that inhibit the transport of neurotransmitters into axon terminals or into storage vesicles within terminals. For many transmitters, uptake determines the time course of transmitter action so inhibiting uptake prolongs the activity of the transmitter. Blocking uptake may also deplete available transmitter stores. Many clinically important drugs are uptake inhibitors although the indirect reactions of the brain rather than the acute block of uptake itself is often responsible for the therapeutic effects.

Cultivation of PLANTS; (FRUIT; VEGETABLES; MEDICINAL HERBS) on small plots of ground or in containers.

The uptake or transfer of energy from RADIATION.

Quick Search


DeepDyve research library

Searches Linking to this Article