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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Cassimiro, Jessica C. [1] ; Moraes, Regina M. [1]
Total Authors: 2
[1] Inst Bot, Caixa Postal 68041, BR-04045972 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Environmental Science and Pollution Research; v. 23, n. 8, p. 8085-8090, APR 2016.
Web of Science Citations: 2

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)

FAPESP's process: 11/12433-3 - Assessment of Astronium graveolens Jacq. as an ozone-bioindicator species through the quantification of visible leaf injuries
Grantee:Jéssica Cristina Cassimiro
Support type: Scholarships in Brazil - Scientific Initiation