PHYSIOLOGICAL RESPONSE OF TWO OLIVE GENOTYPES TO GASEOUS POLLUTANTS

Physiological and morphological responses of young olive plants (Olea europaea cvs Frantoio and Moraiolo) exposed to SO₂ vapors (0, 35, 70, 100 ppb for 150 d), and different O₃ regimes (a single pulse of 150 ppb for 5 h and 0, 50 or 100 ppb for 5 h d^-1 for 120 d), were measured by an infra-red gas analyser.
LTSEM observations were performed on cryofixed specimens kept frozen-hydrated during analysis.
SO₂ and O₃ fumigated plants highlighted a different genotype response.
No visible symptoms were induced by SO₂, while symptoms appeared in the long-term O₃ treatment after 100 days in Moraiolo.
The physiological and morphological effects observed were capable to induced a depression in photosynthetic activity and in transpiring surface.
These depressions can cause a decrease in growth and yield parameters over a long growing period.

III International Symposium on Olive Growing

C. Vitagliano, A. Minnocci, L. Sebastiani, A. Panicucci, G. Lorenzini

Olea europaea, SO₂, O₃, stomata, gas exchange, LTSEM

https://doi.org/10.17660/ActaHortic.1999.474.88