4.7 Article

Responses to temperature of fruit dry weight, oil concentration, and oil fatty acid composition in olive (Olea europaea L. var. 'Arauco')

期刊

EUROPEAN JOURNAL OF AGRONOMY
卷 54, 期 -, 页码 107-115

出版社

ELSEVIER SCIENCE BV
DOI: 10.1016/j.eja.2013.12.005

关键词

Fatty acid composition; Heating; Olive oil; Oleic acid concentration; Temperature; Warm environment

类别

资金

  1. Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET)
  2. Ministerio de Ciencia, Tecnologia e Innovacion Productiva de Argentina [PFIP-ESPRO 04/08, PICT 2008 0884]

向作者/读者索取更多资源

Correlative studies in olive using data from different locations or years suggest that temperature can modulate crop oil yield and oil composition. However, there are no published studies of manipulative experiments that demonstrate a direct role for temperature as a regulator of oil yield and oil quality in olive. The objectives of this study were to: i) elucidate the effect of temperature during the fruit oil accumulation phase on fruit dry weight, oil concentration and fatty acid composition; and ii) identify the developmental window within the oil accumulation phase exhibiting the greatest sensitivity to temperature and that with the highest fruit capacity to recover from the temperature treatments. Two branch-level experiments were conducted in a commercial orchard at Los Molinos (La Rioja, Argentina) using var. 'Arauco'. Both experiments were conducted during the oil accumulation phase by enclosing fruiting branches in transparent plastic chambers with individualized temperature control. The first experiment; known as the four month long experiment, employed four temperature treatments that were applied for a single period of four months: a control at ambient temperature, two heating levels (5 degrees C and 10 degrees C warmer than the control), and a cooling level (5 degrees C cooler than the control). The second experiment consisted of four separate successive one month long treatment periods, in each of which two temperature treatments were applied: control and heating (ca. 7 degrees C higher than control). In the four month long experiment, fruit dry weight was not affected by average temperatures in the 16-25 degrees C range, but it was reduced with further increases in temperature. Oil concentration decreased linearly at 1.1% degrees C-1 across the whole range (16-32 degrees C) of average seasonal temperatures explored, while oleic acid concentration decreased 0.7% degrees C-1 over the same range. In the one month long experiment, 30 days of temperatures ca. 7 degrees C above ambient had a permanent negative effect on oil concentration at final harvest, particularly when the exposure to high temperature took place at the beginning of oil accumulation. By contrast, oleic acid concentration at the end of the treatment interval fell with increasing temperature but it could recover after treatment was removed in all periods except the first one. These results show that high temperatures during the oil accumulation phase may negatively affect olive oil yield and quality in warm regions, particularly if the high-temperature event occurs early in the phase. Additionally, the response of oleic acid concentration (%) to temperature under our experimental conditions was found to be opposite to that of many annual oil-seed crops. (C) 2013 Elsevier B.V. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据