Ozone-induced foliar injury in saplings of Psidium guajava 'Paluma' in São Paulo, Brazil.

  title={Ozone-induced foliar injury in saplings of Psidium guajava 'Paluma' in S{\~a}o Paulo, Brazil.},
  author={J Patricia Moreno Pina and Regina Maria Moraes},
  volume={66 7},
Psidium guajava 'Paluma' was evaluated under field conditions as a tropical bioindicator species of ozone (O(3)). Three exposures of 90 days each were performed (June 21, 2004-March 19, 2005). In each one of them, saplings of 'Paluma' (n=30) were exposed to ambient air at a site in São Paulo (Brazil) with high ozone concentrations, and in a greenhouse with charcoal-filtered air. Ozone-like visible foliar injuries were observed during the winter, spring and summer exposures, when AOT40 reached… CONTINUE READING

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