Short-term leaf responses of Nicotiana tabacum 'Bel-W3' to ozone under the environmental conditions of São Paulo, SE - Brazil

Autor(es)

Silvia Ribeiro de Souza ^[1] ; Silvia Maria Romano Sant'Anna ^[2] ; Mirian Cilene Spasiani Rinaldi ^[3] ; Marisa Domingos ^[4]

Afiliação do(s) autor(es)

^[1] Instituto de Botânica - Brasil

^[2] Instituto de Botânica - Brasil

^[3] Instituto de Botânica - Brasil

^[4] Instituto de Botânica - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Archives of Biology and Technology; v. 52, n. 1, p. 251-258, 2009-02-00.

Resumo

The present study aimed to study if the intensity and precocity of short-term leaf responses of Nicotiana tabacum 'Bel-W3' depended on the daily atmospheric levels of ozone and/or daily meteorological conditions in a State Park located in the city of São Paulo, SE Brazil. From 16 September to 14 October 2002, three lots of six potted plants were exposed for fourteen days. Leaf necrosis, atmospheric ozone concentrations and meteorological parameters were daily measured. The average percentage of leaf necrosis ranged from 5% to 20%. A 4th degree polynomial model was proposed to explain daily progress of leaf necrosis on plants. The average ozone levels were increased from morning (1.3-39.2 ppbv) to the midday (1.6-52.0 ppbv) and decreased in the evening (0.5-39.9 ppbv). Daily pattern of accumulated percentage of leaf necrosis was not strictly related to ozone, but was influenced by the meteorological conditions and stage of development of leaves. (AU)

• Processo FAPESP: 02/04751-6 - Avaliação das respostas de bioindicadores vegetais a diferentes condições da química atmosférica envolvidas no smog fotoquímico: um estudo em câmara controlada simulando a poluição urbana
• Beneficiário: Silvia Ribeiro de Souza
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 00/06422-4 - Caesalpinia echinata (Pau-brasil) da semente à madeira, um modelo para estudos de plantas arbóreas tropicais brasileiras
• Beneficiário: Rita de Cassia Leone Figueiredo Ribeiro
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 02/11956-3 - Potencial de uso de nicotiana tabacum var. bel w3 para mapeamento especial e temporal de riscos impostos por ozonio a populacao humana, na cidade de sao paulo.
• Beneficiário: Silvia Maria Romano Sant'Anna
• Modalidade de apoio: Bolsas no Brasil - Mestrado