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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.)

Photosynthetic responses of tropical trees to short-term exposure to ozone

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Author(s):
Moraes, R. M. ; Furlan, C. M. ; Domingos, M. ; Meirelles, S. T. ; Salatino, A. ; Delitti, W. B.C ; Sanz, M. J. ; Bulbovas, P. [8]
Total Authors: 8
Document type: Journal article
Source: Photosynthetica; v. 42, n. 2, p. 291-293, jun. 2004.
Field of knowledge: Biological Sciences - Ecology
Abstract

Saplings of the tropical trees Tibouchina pulchra (Cham.) Cogn., Caesalpinia echinata Lam., and Psidium guajava L. cv. Paluma were exposed in open-top chambers with charcoal filtered air and measurements of gas exchange and chlorophyll fluorescence were made before (t1) and after exposure to non-filtered air plus O3 (t2), simulating 6-h peaks of O3 similar to those observed in São Paulo city (SE Brazil, reaching an AOT40 of 641 nmol mol-1). After the fumigation, the net photosynthetic rate, stomatal conductance, transpiration rate, and Fv/Fm were reduced (p<0.05) for the three species. C. echinata was the most sensitive species and P. guajava cv. Paluma the most resistant. (AU)

FAPESP's process: 00/06422-4 - Caesalpinia echinata Lam. (Brazil-wood): from seed to wood, a model for studies on tropical Brazilian trees
Grantee:Rita de Cassia Leone Figueiredo Ribeiro
Support Opportunities: Research Projects - Thematic Grants