Volume 13, Issue 52 (2016)                   FSCT 2016, 13(52): 35-45 | Back to browse issues page

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Rostami S, Ghasem Nejad M, Ramezani Malak Roodi M. Effect of fruit harvest time on antioxidant compounds of oil in some olive (Olea europaea L.) cultivars at Roodbar region. FSCT 2016; 13 (52) :35-45
URL: http://fsct.modares.ac.ir/article-7-6605-en.html
Effect of fruit harvest time on antioxidant compounds of oil in some olive (Olea europaea L.) cultivars at Roodbar region
Sedigheh Rostami , Mahmood Ghasem Nejad , Mohammad Ramezani Malak Roodi
Abstract:   (8290 Views)
One of the main effective factors on olive oil quality is harvesting fruit at proper time. In this study, the effect of fruit harvesting time on oil antioxidant compounds of four olive cultivars, Zard, Rowghani, Arbequina and Coratina was investigated at Roodbar region, Guilan province. Therefore, the characteristics such as total chlorophyll, total carotenoid, total phenol, total flavonoid, antioxidant capacity, IC50 and anti-radical efficiency (AE) were determined in the oil. The results showed that with delaying in harvest time, antioxidant compounds of olive oil such as total chlorophyll and carotenoid, total phenolic and flavonoid decreased, that followed by declining oil antioxidant capacity and AE and, but increasing IC50. The results also showed that there was a positive significant correlation between olive oil total antioxidant activity with AE (+0.919), total chlorophyll (+0.562), total carotenoid (+0.562), total phenolic (+0.86) and flavonoid (+0.868) and a negative correlation with IC50 (-0.87). Overall, the highest antioxidant compounds were found when Zard, Rowghany and Arbequina cultivars fruits were harvested from 7 October to 18 October and 18 october to1 November for Coratina cultivars. Furthermore, delaying in fruit harvest time could increase olive oil content but declined oil antioxidant compounds and its nutritional value. 
Keywords: Key words: Antioxidant activity, Harvesting date, Olive Oil
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Received: 2015/04/21 | Accepted: 2015/09/23 | Published: 2016/05/21
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