Brazilian Archives of Biology and Technology | |
Short-term leaf responses of Nicotiana tabacum 'Bel-W3' to ozone under the environmental conditions of São Paulo, SE - Brazil | |
Silvia Ribeiro De Souza1  Silvia Maria Romano Sant'anna1  Mirian Cilene Spasiani Rinaldi1  Marisa Domingos1  | |
[1] ,Instituto de BotânicaSão Paulo SP ,Brasil | |
关键词: Leaf necrosis; N. tabacum Bel-W3; ozone; meteorological parameters; | |
DOI : 10.1590/S1516-89132009000100030 | |
来源: SciELO | |
【 摘 要 】
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.
【 授权许可】
CC BY-NC
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RO202005130165938ZK.pdf | 77KB | download |