Ozone stomatal flux and O-3 concentration-based metrics for Astronium graveolens Jacq., a Brazilian native forest tree species

Autor(es)

Cassimiro, Jessica C. ^[1] ; Moura, Barbara B. ^[2] ; Alonso, Rocio ^[3] ; Meirelles, Sergio T. ^[4] ; Moraes, Regina M. ^[1]

Afiliação do(s) autor(es)

^[1] Inst Bot, Caixa Postal 3005, BR-01061970 Sao Paulo, SP - Brazil

^[2] Univ Estadual Campinas, Inst Biol, R Monteiro Lobato 255, BR-13083872 Campinas, SP - Brazil

^[3] CIEMAT, Ecotoxicol Air Pollut, Ave Complutense 2, E-28040 Madrid - Spain

^[4] Univ Sao Paulo, Rua Matao 321, BR-05508090 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Environmental Pollution; v. 213, p. 1007-1015, JUN 2016.
• Citações Web of Science: 6

Resumo

The current levels of surface ozone (O-3) are high enough to negatively affect trees in large regions of Sao Paulo State, southeastern Brazil, where standards for the protection of vegetation against the adverse effects of O-3 do not exist. We evaluated three O-3 metrics - phytotoxic ozone dose (POD), accumulated ozone exposure over the threshold of 40 ppb h (AOT40), and the sum of all hourly average concentrations (SUM00) - for the Brazilian native tropical tree species Astronium graveolens Jacq. We used the DO3SE (Deposition of Ozone for Stomatal Exchange) model and calculated PODY for different thresholds (from 0 to 6 mmol O-3 m(-2) PLA s(-1)), evaluating the model's performance through the relationship between measured and modelled conductance. The response parameters were: visible foliar injury, considered as incidence (% injured plants), severity (% injured leaves in relation to the number of leaves on injured plants), and leaf abscission. The model performance was suitable and significant (R-2 = 0.58; p < 0.001). PODO was better correlated to incidence and leaf abscission, and SUM00 was better correlated to severity. The highest values of O-3 concentration-based metrics (AOT40 and SUM00) did not coincide with those of PODO. Further investigation may improve the model and contribute to the proposition of a national standard for the protection of native species. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 11/51233-0 - Analises fisiologicas em especies arboreas com vistas a elaboracao de modelo de fluxo estomatico de ozonio.
• Beneficiário: Regina Maria de Moraes
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/02309-9 - Avaliação de modelo de fluxo estomático de ozônio em Astronium graveolens Jacq.
• Beneficiário: Jéssica Cristina Cassimiro
• Modalidade de apoio: Bolsas no Brasil - Mestrado