ISHS Acta Horticulturae 474: III International Symposium on Olive Growing
PHYSIOLOGICAL RESPONSE OF TWO OLIVE GENOTYPES TO GASEOUS POLLUTANTS |
| Authors: | C. Vitagliano, A. Minnocci, L. Sebastiani, A. Panicucci, G. Lorenzini |
| Keywords: | Olea europaea, SO2, O3, stomata, gas exchange, LTSEM |
| Abstract:
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. | |
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