High temperature environment reduces olive oil yield and quality.

Area of Science:

• Agricultural Science
• Plant Physiology
• Environmental Science

Background:

• Global warming poses risks to plant growth, particularly from elevated temperatures.
• Olive oil production is sensitive to environmental conditions, impacting yield and quality.

Purpose of the Study:

• To investigate the impact of high temperature environments on olive fruit development, oil concentration, and oil quality.
• To compare the heat stress tolerance of different olive cultivars.

Main Methods:

• Field study comparing five olive cultivars in high-temperature and mild-temperature summer regions.
• Analysis of fruit weight, dry fruit weight, oil concentration, and oil quality traits.

Main Results:

• High temperatures negatively affected fruit weight and oil concentration in most cultivars, with 'Koroneiki' and 'Souri' showing significant decreases.
• No tested cultivar demonstrated complete heat stress tolerance.
• 'Souri' exhibited greater tolerance in oil quality compared to other cultivars under high temperatures.

Conclusions:

• Olive cultivar responses to high temperatures are genotype-dependent.
• Understanding cultivar-specific heat stress mechanisms is crucial for developing heat-tolerant olive varieties.
• Adaptation strategies for olive cultivation in warming climates require cultivar selection and further research.