Plant Volatile Organic Compounds (VOCs) in Ozone (O-3) Polluted Atmospheres: The Ecological Effects

Autor(es)

Pinto, Delia M. ^[1] ; Blande, James D. ^[2] ; Souza, Silvia R. ^[3] ; Nerg, Anne-Marja ^[2] ; Holopainen, Jarmo K. ^[2]

Afiliação do(s) autor(es)

^[1] MTT Agrifood Res Finland, Plant Prod Res Plant Protect Unit, Jokioinen 31600 - Finland

^[2] Univ Kuopio, Dept Environm Sci, FIN-70211 Kuopio - Finland

^[3] Inst Bot, Dept Ecol, BR-01061970 Sao Paulo - Brazil

• Tipo de documento: Artigo de Revisão
• Fonte: Journal of Chemical Ecology; v. 36, n. 1, p. 22-34, JAN 2010.
• Citações Web of Science: 63

Resumo

Tropospheric ozone (O(3)) is an important secondary air pollutant formed as a result of photochemical reactions between primary pollutants, such as nitrogen oxides (NO(x)), and volatile organic compounds (VOCs). O(3) concentrations in the lower atmosphere (troposphere) are predicted to continue increasing as a result of anthropogenic activity, which will impact strongly on wild and cultivated plants. O(3) affects photosynthesis and induces the development of visible foliar injuries, which are the result of genetically controlled programmed cell death. It also activates many plant defense responses, including the emission of phytogenic VOCs. Plant emitted VOCs play a role in many eco-physiological functions. Besides protecting the plant from abiotic stresses (high temperatures and oxidative stress) and biotic stressors (competing plants, micro- and macroorganisms), they drive multitrophic interactions between plants, herbivores and their natural enemies e.g., predators and parasitoids as well as interactions between plants (plant-to-plant communication). In addition, VOCs have an important role in atmospheric chemistry. They are O(3) precursors, but at the same time are readily oxidized by O(3), thus resulting in a series of new compounds that include secondary organic aerosols (SOAs). Here, we review the effects of O(3) on plants and their VOC emissions. We also review the state of current knowledge on the effects of ozone on ecological interactions based on VOC signaling, and propose further research directions. (AU)

• Processo FAPESP: 08/03208-3 - Avaliação do impacto do ozônio e de seus precursores na emissão de compostos orgânicos voláteis e na atividade antioxidante de folhas de plantas modelo expostas a condições controladas
• Beneficiário: Silvia Ribeiro de Souza
• Modalidade de apoio: Bolsas no Exterior - Novas Fronteiras