The climate benefits of high-sugar grassland may be compromised by ozone pollution

Hewitt, Daniel; Mills, Gina; Hayes, Felicity; Davies, W. J.

doi:10.1016/j.scitotenv.2016.04.151

Cited by 6 publications

(1 citation statement)

References 52 publications

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“…In 2016, all treatments were ‘peak’ in profile. Although O 3 treatments were not replicated, numerous studies have established the statistical validity of conducting unreplicated experiments using the solar dome facility [56,77,78], and previous work has shown that no solar dome effect on air or leaf temperature is detectable [79].…”

Section: Methodsmentioning

confidence: 99%

New Insights into Leaf Physiological Responses to Ozone for Use in Crop Modelling

Osborne

Pandey

Mills

et al. 2019

Plants

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Estimating food production under future air pollution and climate conditions in scenario analysis depends on accurately modelling ozone (O3) effects on yield. This study tests several assumptions that form part of published approaches for modelling O3 effects on photosynthesis and leaf duration against experimental data. In 2015 and 2016, two wheat cultivars were exposed in eight hemispherical glasshouses to O3 ranging from 22 to 57 ppb (24 h mean), with profiles ranging from raised background to high peak treatments. The stomatal O3 flux (Phytotoxic Ozone Dose, POD) to leaves was simulated using a multiplicative stomatal conductance model. Leaf senescence occurred earlier as average POD increased according to a linear relationship, and the two cultivars showed very different senescence responses. Negative effects of O3 on photosynthesis were only observed alongside O3-induced leaf senescence, suggesting that O3 does not impair photosynthesis in un-senesced flag leaves at the realistic O3 concentrations applied here. Accelerated senescence is therefore likely to be the dominant O3 effect influencing yield in most agricultural environments. POD was better than 24 h mean concentration and AOT40 (accumulated O3 exceeding 40 ppb, daylight hours) at predicting physiological response to O3, and flux also accounted for the difference in exposure resulting from peak and high background treatments.

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Section: Methodsmentioning

confidence: 99%

New Insights into Leaf Physiological Responses to Ozone for Use in Crop Modelling

Osborne

Pandey

Mills

et al. 2019

Plants

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Evaluation of the impacts of ozone on the vegetation productivity of woodland and grassland ecosystems in China

Qinyi,

Mei,

Shaoqiang

et al. 2023

Ecological Modelling

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Leaf traits and photosynthetic responses of Betula pendula saplings to a range of ground-level ozone concentrations at a range of nitrogen loads

Harmens

Hayes

Sharps

et al. 2017

Journal of Plant Physiology

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Article (refereed) -postprint Harmens, Harry; Hayes, Felicity; Sharps, Katrina; Mills, Gina; Calatayud, Vicent. 2017. Leaf traits and photosynthetic responses of Betula pendula saplings to a range of ground-level ozone concentrations at a range of nitrogen loads.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.

show abstract

The climate benefits of high-sugar grassland may be compromised by ozone pollution

Cited by 6 publications

References 52 publications

New Insights into Leaf Physiological Responses to Ozone for Use in Crop Modelling

New Insights into Leaf Physiological Responses to Ozone for Use in Crop Modelling

Evaluation of the impacts of ozone on the vegetation productivity of woodland and grassland ecosystems in China

Leaf traits and photosynthetic responses of Betula pendula saplings to a range of ground-level ozone concentrations at a range of nitrogen loads

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