Highlighting the threat from current and near-future ozone pollution to clover in pasture

Hewitt, D.K.L.; Mills, G.; Hayes, F.; Wilkinson, S.; Davies, W.. 2014 Highlighting the threat from current and near-future ozone pollution to clover in pasture. Environmental Pollution, 189. 111-117.

Before downloading, please read NORA policies.
N505787PP.pdf - Accepted Version

Download (250kB) | Preview


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):
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
Date made live: 25 Mar 2014 14:25 +0 (UTC)

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...