Reduced soil water availability did not protect two competing grassland species from the negative effects of increasing background ozone

Wagg, Serena; Mills, Gina; Hayes, Felicity; Wilkinson, Sally; Cooper, David M.; Davies, W. J.

doi:10.1016/j.envpol.2012.02.010

Cited by 30 publications

(17 citation statements)

References 51 publications

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“…; Wagg et al . , ), both partly mediated by stomatal responses. Interactions of O 3 × WD for biomass productivity and morphological traits, as well as relationships of these responses with stomatal responses, remain poorly characterised.…”

Section: Introductionmentioning

confidence: 99%

“…Plant WD has impacts in many ways similar to those of O 3 , both reducing magnitude and duration of gas exchange and suppressing biomass production (Tingey et al 1971;Miller 1988;Grantz & Yang 1996;Grantz et al 2006). O 3 9 WD interactions are common (Mansfield 1973;Fuhrer & Booker 2003;Hoshika et al 2013), including antagonistic (protective) interactions (Temple 1986(Temple , 1990aTemple et al 1988a,b;Silim et al 2009) and synergistic (deleterious) interactions (Heggestad et al 1985;Wagg et al 2012Wagg et al , 2013, both partly mediated by stomatal responses. Interactions of O 3 9 WD for biomass productivity and morphological traits, as well as relationships of these responses with stomatal responses, remain poorly characterised.…”

Section: Introductionmentioning

confidence: 99%

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Diel trends in stomatal response to ozone and water deficit: a unique relationship of midday values to growth and allometry in Pima cotton?

Grantz

Paudel

et al. 2015

Plant Biol J

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Plant responses to ozone (O3 ) and water deficit (WD) are commonly observed, although less is known about their interaction. Stomatal conductance (gs ) is both an impact of these stressors and a protective response to them. Stomatal closure reduces inward flux of O3 and outward flux of water. Stomatal measurements are generally obtained at midday when gas exchange is maximal, but these may not be adequate surrogates for stomatal responses observed at other times of day, nor for non-stomatal responses. Here, we find in Pima cotton that stomatal responses to O3 observed at midday do not reflect responses at other times. Stomata were more responsive to O3 and WD near midday, despite being at quasi-steady state, than during periods of active opening or closing in morning or evening. Stomatal responsivity to O3 was not coincident with maximum gas exchange or with periods of active regulation, but coincident with plant sensitivity to O3 previously determined in this cultivar. Responses of pigmentation and shoot productivity were more closely related to stomatal responses at midday than to responses at other times of day under well-watered (WW) conditions, reflecting higher stomatal responsivity, sensitivity to O3 , and magnitude of midday gs . Under WD conditions, shoot responses were more closely related to early morning gs. Root responses were more closely related to early morning gs under both WW and WD. Responses of stomata to O3 at midday were not good surrogates for stomatal responses early or late in the day, and may not adequately predicting O3 flux under WD or when maximum ambient concentrations do not occur near midday.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Diel trends in stomatal response to ozone and water deficit: a unique relationship of midday values to growth and allometry in Pima cotton?

Grantz

Paudel

et al. 2015

Plant Biol J

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“…The authors note that, given the competing sensitivities to heat or ozone, it is possible to measure the relative benefits for climate adaptation versus air pollution regulation for food security (see also Avnery et al, 2011b). It is of further concern that new evidence suggests that ozone can reduce the sensitivity of plants to drought by interfering with stomatal control mechanisms (Wilkinson and Davies, 2010;Wagg et al, 2012), thereby exacerbating effects of extreme weather events.…”

Section: Ecosystemsmentioning

confidence: 99%

Tropospheric ozone and its precursors from the urban to the global scale from air quality to short-lived climate forcer

et al. 2015

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Abstract. Ozone holds a certain fascination in atmospheric science. It is ubiquitous in the atmosphere, central to tropospheric oxidation chemistry, yet harmful to human and ecosystem health as well as being an important greenhouse gas. It is not emitted into the atmosphere but is a byproduct of the very oxidation chemistry it largely initiates. Much effort is focused on the reduction of surface levels of ozone owing to its health and vegetation impacts, but recent efforts to achieve reductions in exposure at a country scale have proved difficult to achieve owing to increases in background ozone at the zonal hemispheric scale. There is also a growing realisation that the role of ozone as a short-lived climate pollutant could be important in integrated air quality climate change mitigation. This review examines current understanding of the processes regulating tropospheric ozone at global to local scales from both measurements and models. It takes the view that knowledge across the scales is important for dealing with air quality and climate change in a synergistic manner. The review shows that there remain a number of clear challenges for ozone such as explaining surface trends, incorporating new chemical understanding, ozone-climate coupling, and a better assessment of impacts. There is a clear and present need to treat ozone across the range of scales, a transboundary issue, but with an emphasis on the hemispheric scales. New observational opportunities are offered both by satellites and small sensors that bridge the scales.

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“…However, several studies have shown that drought does 29 not always reduce O3 -induced damage to plants in sensitive species (e.g. Mills et al, 2009;30 McLaughlin et al, 2007a;Robinson et al, 1998;Wagg et al, 2012;Wilkinson andDavies, 2009, 31 2010), and that the genetic variability in O3 sensitivity may be related to the extent to which O3 32 reduces the sensitivity of stomatal closure to soil drying. Such effects have been attributed to 1 reduced response to drought signals such as abscisic acid in the presence of ozone-induced stress 2 ethylene emission (Mills et al, 2009;Wilkinson andDavies 2009, 2010).…”

Section: Interactions Between Ozone and Drought 24mentioning

confidence: 99%

Ozone impacts on vegetation in a nitrogen enriched and changing climate

Mills

Harmens

Wagg

et al. 2016

Environmental Pollution

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Mark; Davies, Bill. 2016. Ozone impacts on vegetation in a nitrogen enriched and changing climate.Contact CEH NORA team at noraceh@ceh.ac.ukThe NERC and CEH trademarks and logos ('the Trademarks') are registered trademarks of NERC in the UK and other countries, and may not be used without the prior written consent of the Trademark owner. This paper provides a process-oriented perspective on the combined effects of ozone (O3)  The beneficial effect of N on root development is lost at higher O3 treatments 28  The effects of O3 on root biomass are higher at high than low N. Ozone impacts on vegetation in a nitrogen enriched and changing climate

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Reduced soil water availability did not protect two competing grassland species from the negative effects of increasing background ozone

Cited by 30 publications

References 51 publications

Diel trends in stomatal response to ozone and water deficit: a unique relationship of midday values to growth and allometry in Pima cotton?

Diel trends in stomatal response to ozone and water deficit: a unique relationship of midday values to growth and allometry in Pima cotton?

Tropospheric ozone and its precursors from the urban to the global scale from air quality to short-lived climate forcer

Ozone impacts on vegetation in a nitrogen enriched and changing climate

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