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Ozone risk assessment for plants: central role of metabolism-dependent changes in reducing power

Abstract : The combination of stomatal-dependent ozone flux and total ascorbate level is currently presented as a correct indicator for determining the degree of sensitivity of plants to ozone. However, the large changes in carbon metabolism could play a central role in the strategy of the foliar cells in response to chronic ozone exposure, participating in the supply of reducing power and carbon skeletons for repair and detoxification, and modifying the stomatal mode of functioning. To reinforce the accuracy of the definition of the threshold for ozone risk assessment, it is proposed to also consider the redox pool (NAD(P)H), the ratio between carboxylases and the water use efficiency as indicators of the differential ozone tolerance of plants.
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Submitted on : Sunday, May 31, 2020 - 10:09:30 AM
Last modification on : Wednesday, March 16, 2022 - 3:35:03 AM

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Pierre Dizengremel, Didier Le Thiec, Mathieu Bagard, Yves Jolivet. Ozone risk assessment for plants: central role of metabolism-dependent changes in reducing power. Environmental Pollution, Elsevier, 2008, 156 (1), pp.11-15. ⟨10.1016/j.envpol.2007.12.024⟩. ⟨hal-02667153⟩

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