The efficiency of tobacco Bel-W3 and native species for ozone biomonitoring in subtropical climate, as revealed by histo-cytochemical techniques

Autor(es)

Alves, Edenise S. ^[1] ; Moura, Barbara B. ^[1] ; Pedroso, Andrea N. V. ^[1] ; Tresmondi, Fernanda ^[1] ; Domingos, Marisa ^[1]

Afiliação do(s) autor(es)

^[1] Inst Bot, BR-01061970 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Environmental Pollution; v. 159, n. 12, p. 3309-3315, DEC 2011.
• Citações Web of Science: 14

Resumo

We aimed to verify whether hydrogen peroxide (H(2)O(2)) accumulation and cell death are detected early in three bioindicators of ozone (O(3)), Nicotiana tabacum `Bel-W3', Ipomoea nil `Scarlet O'Hara' and Psidium guajava `Paluma', and whether environmental factors also affect those microscopic markers. The three species were exposed to chronic levels of O(3) in a subtropical area and a histo-cytochemical technique that combines 3,3'-diaminobenzidine (DAB) with Evans blue staining was use I in the assessments. The three species accumulated H(2)O(2), but a positive correlation with O(3) concentration was only observed in N. tabacum. A positive correlation between O(3) and cellular death was also observed in N. tabacum. In I. nil and P. guajava, environmental factors were responsible for symptoms at the microscopic level, especially in P. guajava. We conclude that the most appropriate and least appropriate bioindicator plant for O(3) monitoring in the subtropics are N. tabacum `Bel-W3' and P. guajava `Paluma', respectively. (C) 2011 Published by Elsevier Ltd. (AU)

• Processo FAPESP: 05/51169-9 - Respostas fisiológicas, antioxidativas e estruturais a fatores ambientais em plantas bioindicadoras sensíveis a compostos do smog fotoquímico
• Beneficiário: Marisa Domingos
• Modalidade de apoio: Auxílio à Pesquisa - Regular