Responses of a tropical tree species to ozone: visible leaf injury, growth, and lipid peroxidation

Autor(es)

Cassimiro, Jessica C. ^[1] ; Moraes, Regina M. ^[1]

Afiliação do(s) autor(es)

^[1] Inst Bot, Caixa Postal 68041, BR-04045972 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Environmental Science and Pollution Research; v. 23, n. 8, p. 8085-8090, APR 2016.
• Citações Web of Science: 2

Resumo

The Brazilian native tree species Astronium graveolens was indicated as sensitive to ozone in a fumigation experiment. Thus, the objective of this study was to evaluate how sensitive A. graveolens is to ozone under realistic conditions in the field. Eighteen saplings were exposed to ozone in a contaminated area and in a greenhouse with filtered air during two exposure periods of approximately 63 days each (March-May 2012 and September-October 2012). Leaf injury was analyzed by means of its incidence and severity, the leaf injury index (LII) and the progression of leaf abscission. These variables were monitored weekly, whereas growth and lipid peroxidation were monitored monthly. Plants exposed to ozone showed significant growth decrease and visible leaf injury increase, but lipid peroxidation and leaf abscission remained unchanged. These results indicated that plants subjected to ozone possibly diverted energy from growth to the production of antioxidants necessary to cope with ozone-induced oxidative stress. (AU)

• Processo FAPESP: 11/12433-3 - Avaliação de Astronium graveolens Jacq. como espécie bioindicadora de ozônio por meio da quantificação de injúrias foliares visíveis
• Beneficiário: Jéssica Cristina Cassimiro
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica