| Full text | |
| Author(s): |
Moraes, Regina M.
[1]
;
Meirelles, Sergio T.
[2]
;
Silva, Simone F.
[1]
;
Silva, Daiane T.
[1]
;
de Assis, Pedro I. L. S.
[1]
;
Viola, Sandra R. A. S.
[1]
Total Authors: 6
|
| Affiliation: | [1] Inst Bot, BR-04045972 Sao Paulo - Brazil
[2] Univ Sao Paulo, Dept Ecol, BR-05508090 Sao Paulo, SP - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | ATMOSPHERIC POLLUTION RESEARCH; v. 5, n. 1, p. 8-12, JAN 2014. |
| Web of Science Citations: | 1 |
| Abstract | |
Ipomoea nil (L.) Roth. cv. `Scarlett O'Hara' was evaluated as a tropical bioindicator species sensitive to ozone (O-3). A total of nine field experiments were performed, with 28 days of exposure each. Visible leaf injuries, carbon assimilation (Asat) and stomatal conductance (gs) were quantified and correlated to oscillations in environmental conditions and accumulated ozone exposure over a threshold of 40 ppb h (AOT40). The values of gas exchange and leaf injury continuously varied throughout the study period. Asat and leaf injury (chlorosis) were higher in spring than in others seasons. The gs was higher in autumn. The analyses of the abiotic and biotic variables revealed an opposing trend between the Asat and both leaf injury and AOT40. Ozone levels were moderate and its relationship with gs was inverse. This may be the cause of the moderate injury. `Scarlett O'Hara' is sensitive to O-3 and has potential as an O-3 bioindicator in sub-tropical regions. (AU) | |
| FAPESP's process: | 08/51537-6 - Climatic variations and concentrations of ozone in young plants of Ipomoea nil Scarlet O’ Hara |
| Grantee: | Sandra Regina de Araujo da Silva Viola |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |