ISHS Acta Horticulturae 791: V International Symposium on Olive Growing
INFLUENCE OF DIFFERENT OLIVE INFECTION RATES OF COLLETOTRICHUM ACUTATUM ON SOME IMPORTANT OLIVE OIL CHEMICAL PARAMETERS |
| Authors: | M.T. Carvalho, P. Simões-Lopes, M.J. Monteiro da Silva |
| Keywords: | olive crop, anthracnose, acidity, oxidative stability, phenolic compounds |
| Abstract:
The olive anthracnose caused by the fungal plant pathogen Colletotrichum sp. is one of the main constraints affecting both olive production and oil quality on olive crop, every year, in Portugal. The aim of this research was to obtain some information how that disease affects some important chemical parameters for olive oil quality: acidity, peroxide index and absorbency in ultraviolet, fatty acids, oxidative stability and phenolic compounds. Regarding olive oil, the most remarkable results were: a strong correlation between olives infection vs. acidity (r=0.96); a strong and negative correlation between olives infection vs. oxidative stability (r=-0.98). The lowering oxidative stability seems as a sequence of the strong and negative correlation found between oxidative stabiliy vs. phenolic compounds (r=0.99). | |
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