A quantitative assessment of hormetic responses of plants to ozone

TitleA quantitative assessment of hormetic responses of plants to ozone
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2019
AuthorsAgathokleous, E., Araminienė V., Belz R.G., Calatayud V., De Marco Alessandra, Domingos M., Feng Z., Hoshika Y., Kitao M., Koike T., Paoletti E., Saitanis C.J., Sicard P., and Calabrese E.J.
JournalEnvironmental Research
Keywordsagricultural chemical, air pollutant, Air pollution, atmospheric pollution, Biology, cladistics, concentration (composition), Dose-Response Relationship, environmental change, Hormesis, nonhuman, open-top chamber, Ozone, Plant, plant stress, pollution exposure, priority journal, quantitative analysis, review, tree, vegetation type, woody plant

Evaluations of ozone effects on vegetation across the globe over the last seven decades have mostly incorporated exposure levels that were multi-fold the preindustrial concentrations. As such, global risk assessments and derivation of critical levels for protecting plants and food supplies were based on extrapolation from high to low exposure levels. These were developed in an era when it was thought that stress biology is framed around a linear dose-response. However, it has recently emerged that stress biology commonly displays non-linear, hormetic processes. The current biological understanding highlights that the strategy of extrapolating from high to low exposure levels may lead to biased estimates. Here, we analyzed a diverse sample of published empirical data of approximately 500 stimulatory, hormetic-like dose-responses induced by ozone in plants. The median value of the maximum stimulatory responses induced by elevated ozone was 124%, and commonly


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