Journal
SCIENTIA HORTICULTURAE
Volume 240, Issue -, Pages 405-410Publisher
ELSEVIER
DOI: 10.1016/j.scienta.2018.06.054
Keywords
Climate change; High temperature; Olive flowering; Open top chamber (OTC); Fruit set
Categories
Funding
- Consejeria de Economia y Conocimiento de la Junta de Andalucia Incentivos a Proyectos de Investigacion de Excelencia [AGR/7152]
- Plan Propio de Investigacion de la Universidad de Cordoba
- Programa Operativo de fondos FEDER Andalucia
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The increase in air temperature associated to climate change is expected to affect olive (Olea europaea L.) tree fructification. To determine the potential effects of global warming on floral phenology and fruit set under field conditions, olive trees growing in a Mediterranean climate type area were subjected to warmer temperature than ambient by the use of temperature controlled Open-top-Chambers (OTCs). Each OTC, equipped with heating and ventilation devices, was able to maintain a day/night temperature gradient between the tree and the surrounding environment of 4 degrees C throughout the complete reproductive cycle of this species. After three years of study, the results obtained have shown that increasing temperature 4 degrees C above the actual ambient temperature may led to an advance of the date of flowering in the olive, an extent of the flowering period, an increase of pistil abortion, and a reduction in fruit set, conditions which may reduce yield.
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