Highlighting the threat from current and near-future ozone pollution to clover in pasture
Hewitt, D.K.L.; Mills, G.; Hayes, F. 
ORCID: https://orcid.org/0000-0002-1037-5725; Wilkinson, S.; Davies, W..
2014
Highlighting the threat from current and near-future ozone pollution to clover in pasture.
Environmental Pollution, 189.
111-117.
10.1016/j.envpol.2014.02.033
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Abstract/Summary
Globally, the legume-rhizobia symbiosis, contained within specialised organs called root nodules, is thought to add at least 30 Tg N annually to agricultural land. The growth and functioning of a moderncurrent white clover (Trifolium repens cv. Crusader) and red clover (T. pratense cv. Merviot) cultivar were investigated in current and future ozone scenarios in solardomes. Both cultivars developed leaf injury and had significant reductions in root biomass and root nodule number in response to ozone, with Crusader also displaying a reduced size and mass of nodules. In-situ measurements of N-fixation in Crusader by acetylene reduction assay revealed reduced N-fixation rates in a future scenario with an increased background and moderate peaks of ozone. The implications for the sustainability of temperate pasture are discussed.
| Item Type: | Publication - Article |
|---|---|
| Digital Object Identifier (DOI): | 10.1016/j.envpol.2014.02.033 |
| Programmes: | CEH Topics & Objectives 2009 - 2012 > Biogeochemistry |
| UKCEH and CEH Sections/Science Areas: | Emmett |
| ISSN: | 0269-7491 |
| Additional Keywords: | clover, nodulation, ozone, nitrogen, fixation, pasture, background ozone |
| NORA Subject Terms: | Ecology and Environment Agriculture and Soil Science Atmospheric Sciences Biology and Microbiology Botany |
| Date made live: | 25 Mar 2014 14:25 +0 (UTC) |
| URI: | https://nora.nerc.ac.uk/id/eprint/505787 |
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