Plant responses to elevated CO2 levels in soils: distinct CO2 and O2-depletion effects

Lake, Janice A. and Steven, Michael D. and Smith, Karon L. and Lomax, Barry H. (2016) Plant responses to elevated CO2 levels in soils: distinct CO2 and O2-depletion effects. International Journal of Greenhouse Gas Control . ISSN 1750-5836

[img] PDF - Repository staff only until 7 August 2017. - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Available under Licence Creative Commons Attribution Non-commercial No Derivatives.
Download (261kB)


To investigate potential environmental effects in the context of carbon dioxide (CO2) leakage from Carbon Capture and Storage (CCS) schemes, the University of Nottingham ASGARD (Artificial Soil Gassing And Response Detection) facility, was used to inject CO2 into the soil in replicated open-air field plots over several seasons to measure the effects on UK crop species. However, this system lacked a way of distinguishing the concomitant effects of oxygen (O2)-depletion (occurring as a consequence of high CO2 levels in the soil). As plants are aerobic, they require O2 for functional integrity of root processes. Here a complementary laboratory system was used to specifically identify distinct CO2 and O2-depletion effects on two crop species, beetroot and wheat. Parameters measured (photosynthetic rate, transpiration rate, stomatal conductance and biomass) between CO2-gassed, nitrogen (N2)-gassed (O2-depletion control) and non-gassed control plants showed distinct differences in response to CO2 gassing and O2-depletion. Differences between field and laboratory studies illustrate effects of variable meteorological conditions in the field, whilst more stable laboratory conditions show differences between crop species. Results show that the interactions of these two stresses (very high soil CO2 and O2 depletion) on crop physiology are discrete and complex.

Item Type: Article
Keywords: Extreme CO2; Soils; Gas exchange; O2 Depletion; Hypoxia; Crops; Carbon capture and storage; CCS; Roots
Schools/Departments: University of Nottingham UK Campus > Faculty of Social Sciences > School of Geography
University of Nottingham UK Campus > Faculty of Science > School of Biosciences > Division of Agricultural and Environmental Sciences
Identification Number:
Depositing User: Eprints, Support
Date Deposited: 26 Sep 2016 13:51
Last Modified: 26 Sep 2016 15:18

Actions (Archive Staff Only)

Edit View Edit View