Relative effects of elevated background ozone concentrations and peak episodes on senescence and above-ground growth in four populations of Anthoxanthum odoratum L.

Dawnay, Louise; Mills, Gina. 2009 Relative effects of elevated background ozone concentrations and peak episodes on senescence and above-ground growth in four populations of Anthoxanthum odoratum L. Environmental Pollution, 157 (2). 503-510. 101016/j.envpol.2008.09.003

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Official URL: http://www.sciencedirect.com/science/journal/02697...

Abstract/Summary

Four populations of Anthoxanthum odoratum from North Wales, UK, were exposed to the following combinations of mean background and peak concentrations of ozone for 12 weeks in solardomes: LL (14.3 ppb, 18.9 ppb, respectively), LH (14.8 ppb, 52.3 ppb), HL (28.9 ppb, 35.7 ppb) and HH (30.5 ppb, 72.1 ppb). Elevated ozone rapidly induced premature senescence, with effect increasing in the order: LL < LH < HL < HH. By week 11, the LH and HL treatments had induced similar amounts of whole plant senescence even though the AOT4012 values (accumulated between 8am and 8pm) were very different at 10.6 ppm h and 4.1 ppm h, respectively. Overall, linear correlations between whole plant senescence were stronger for AOT0 than for AOT40. Intraspecific variation in the senescence response to the different profiles was observed after 11 weeks of exposure. Effects on growth and tillering were less pronounced than effects on senescence.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	101016/j.envpol.2008.09.003
Programmes:	CEH Programmes pre-2009 publications > Biogeochemistry > BG03 Quantifying the growing threat to plant and human health from ground level ozone > BG03.1 Field Studies of Ozone Effects on Semi-Natural Vegetation
UKCEH and CEH Sections/Science Areas:	Emmett
ISSN:	0269-7491
Additional Keywords:	Ozone, Senescence, Biomass, Anthoxanthum odoratum, Intraspecific variation
NORA Subject Terms:	Agriculture and Soil Science Ecology and Environment
Date made live:	06 May 2009 11:51 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/4463

Item Type:

Publication - Article

Digital Object Identifier (DOI):

101016/j.envpol.2008.09.003

Programmes:

CEH Programmes pre-2009 publications > Biogeochemistry > BG03 Quantifying the growing threat to plant and human health from ground level ozone > BG03.1 Field Studies of Ozone Effects on Semi-Natural Vegetation

UKCEH and CEH Sections/Science Areas:

Emmett

ISSN:

0269-7491

Additional Keywords:

Ozone, Senescence, Biomass, Anthoxanthum odoratum, Intraspecific variation