Journal
ENVIRONMENTAL POLLUTION
Volume 165, Issue -, Pages 91-99Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2012.02.010
Keywords
Background ozone; Carbon allocation; Climate change; Drought; Senescence; Stomatal conductance; Soil moisture deficit; Roots
Categories
Funding
- NERC
- Natural Environment Research Council [ceh010023] Funding Source: researchfish
Ask authors/readers for more resources
Two common (semi-) natural temperate grassland species, Dactylis glomerata and Ranunculus acris, were grown in competition and exposed to two watering regimes: well-watered (WW, 20-40% v/v) and reduced-watered (RW, 7.5-20% v/v) in combination with eight ozone treatments ranging from pre-industrial to predicted 2100 background levels. For both species there was a significant increase in leaf damage with increasing background ozone concentration. RW had no protective effect against increasing levels of ozone-induced senescence/injury. In high ozone, based on measurements of stomatal conductance, we propose that ozone influx into the leaves was not prevented in the RW treatment, in D. glomerata because stomata were a) more widely open than those in less polluted plants and b) were less responsive to drought. Total seasonal above ground biomass was not significantly altered by increased ozone; however, ozone significantly reduced root biomass in both species to differing amounts depending on watering regime. (C) 2012 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available