DTA

Digital Theses Archive

 

Tesi etd-03312019-203425

Type of thesis
Dottorato
Author
DOUROU, ATHANASIA-MARIA
URN
etd-03312019-203425
Title
Factors affecting yield efficiency and oil quality in Olea europaea L.
Scientific disciplinary sector
AGR/03
Course
SCIENZE AGRARIE E BIOTECNOLOGIE - Agrobiodiversity
Committee
relatore Prof. TONUTTI, PIETRO
Membro Prof. KALAITZIS, PANGIOTIS
Membro Prof. MENCARELLI, FABIO
Keywords
  • Olea europaea L.
  • olive oil quality
  • yield
Exam session start date
;
Availability
parziale
Abstract
The first part of this dissertation is devoted to the deciphering of the mechanism underlying behind the premature fruitlet drop in olives utilising high throughput and state of the art techniques (Next Generation Sequencing, 1H-NMR, and LC-MS). It presents new insights of key metabolites, hormones and differentially expressed genes in developing fruitlets, thus assembling the first glimpse of the physiological, metabolic and molecular mechanism involved in the olive fruitlet drop. The second part aims to shed more light into practical and applicable technological aspects of olive oil production by assessing the effects of lowering fruit temperature before processing in respect to the quality trait of the resulting olive oil, in particular concerning the aroma profiles via HS-SPME-GC-MS, 1H-NMR and spectrophotometric protocols. Lastly, the effects of ethylene post-harvest treatment on two different Italian olive cultivars is assessed in terms of aroma, polyphenols content and antioxidant capacity of the resulting olive oil. This study preliminarily identifies the possible effects of a short post-harvest ethylene application on fruit harvested at different ripening stages and emphasises the genotype-dependent responses to such hormonal treatment.
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