Effect of fruit load on oil yield components and dynamics of fruit growth and oil accumulation in olive (Olea europaea L.)

Trentacoste, Eduardo R.; Puertas, Carlos M.; Sadras, Víctor O.

doi:10.1016/j.eja.2010.01.002

Cited by 63 publications

(59 citation statements)

References 31 publications

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“…Although the harvest of the 2012-2013 season was conducted with a degree-day accumulation (Table 1) and a pulp oil concentration ( Table 2) similar to that of the 2011-2012 season, the fruit presented a lower coloration index (1.8 versus 3.0) ( Table 2). This result agrees with the studies by Tognetti et al (2006) and Trentacoste et al (2010) average fruit weight and fruit oil concentration, who describe the pigment synthesis rate as dependent on the crop load; hence, fruit color, as an index for harvest decisions, must include the production level of the orchard (Trentacoste et al, 2010)average fruit weight and fruit oil concentration.…”

Section: Resultssupporting

confidence: 80%

“…In both seasons, it was found that the fruit volume increased almost linearly between 3 and 11 weeks after total flowering (WAFB, fruit set-pit hardening) and then continued increasing, but at a slower rate, until 21 and 25 WAFB, for the "on" and "off" years, respectively ( Figure 5). This is consistent with recent studies on olive trees, in which no double sigmoidal pattern was found (Lavee, 2007;Trentacoste et al, 2010). This may be because deceleration of growth at stage II of fruit growth would be associated with water availability in the soil.…”

Section: Seasonsupporting

confidence: 82%

“…Although many studies have reported on the effect of crop load on the aerial part of the plant (Dag et al, 2010;Trentacoste et al, 2010;Rapoport, 2011), few studies have examined the competition among the growth of roots, shoots and fruits (Rallo and Cuevas, 2008). These authors indicate that the distribution of photoassimilates between alternative sinks, such as roots, seems to play a relevant role in the plant's vegetative and reproductive growth processes.…”

Section: Introductionmentioning

confidence: 99%

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Effect of crop load on the phenological, vegetative and reproductive behavior of the ‘Frantoio’ olive tree (Olea europaea L.)

Beyá-Marshall

Fichet

2017

Ciencia e investigación agraria

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V. Beyá-Marshall, and T. Fichet. 2017. Effect of crop load on the phenological, vegetative and reproductive behavior of the 'Frantoio' olive tree (Olea europaea L.). Cien. Inv. Agr. 44(1): 43-53. The aim of this study was to characterize the phenological, vegetative and reproductive behavior variables of 'Frantoio' olive trees in an "off" year (with a low crop load) and an "on" year (with a high crop load). To do this, during the 2011-2012 and 2012-2013 seasons, "off" and "on", respectively, phenological variables, plant growth (shoots and roots) and reproductive growth (type of flower, fruit set and growth), were monitored biweekly. In addition, the yield per tree was assessed, and the crop load was estimated. The main results showed that crop load strongly influenced these variables. The distribution and intensity of vegetative growth, both in the roots and aboveground, decreased more and had lower intensity in the high fruiting season, with a large part of this growth occurring prior to flowering. With respect to reproductive variables, a higher percentage of perfect flowers and fruit set in the low flowering season was observed compared to the high load season. These results suggest a partial crop load compensation mechanism under low flowering conditions. This mechanism, however, does not compensate for lower production in the "off" season. In terms of volume, fruit growth was similar between seasons until pit hardening, then the fruit growth rate dropped dramatically in the "on" season, indicating that fruit growth, until pit hardening, would not be affected by the presence of a higher number of fruits per tree.

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Section: Resultssupporting

confidence: 80%

Section: Seasonsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

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Effect of crop load on the phenological, vegetative and reproductive behavior of the ‘Frantoio’ olive tree (Olea europaea L.)

Beyá-Marshall

Fichet

2017

Ciencia e investigación agraria

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“…3) showed significant differences amongst accessions, especially for parameters FWe, FPW, FNo, FDM, FWC, FPP and P/E, and differences for EWe were highly significant. The fruit characteristics, especially the fruit pulp, indicated not only the high diversity amongst 'Žutica' accessions, but also the impact of the year of sampling within each accession, which was found in earlier research on the two-year cycle of olive bearing [Lavee and Wonder 2004, Trentacoste et al 2010, Trentacoste and Puertas 2011.…”

Section: Resultsmentioning

confidence: 90%

Fruit and Endocarp Properties in Relation to Intra-Varietal Morphological Diversity of Montenegrin Olive Variety ‘Žutica’

Lazović¹,

Perović²,

Adakalić³

2018

Acta.Sci.Pol.,Hortorum Cultus

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ABSTRACT'Žutica' is the most widespread olive variety of Montenegro, accounting for as much as 98% of olive trees in the southern part of Montenegrin coastal area -Bar subarea. The primary purpose of variety 'Žutica' is olive oil production due to its small fruits and high oil content, although it is also much appreciated as a table olive, prepared in local ways as green and black. As 'Žutica' is an old olive variety there are some phenotypic differences recorded in the fruit properties. Here we evaluated 22 accessions from the area of Bar and Ulcinj, where this variety is very widespread (almost mono-varietal), for 34 parameters of the fruit and endocarp. Significant differences in fruit properties were observed in the accessions. Average fruit size in nine accessions was above 3.5 g and in two accessions more than 4.0 g. Number of fruits per kg ranged from 224 to 330. Cluster analysis and principal component analysis (PCA) were used to group the accessions and evaluate the morphological variability. The accessions clustered into two groups, with two off group accessions of the highest fruit weight. The results showed differences among individuals, especially for large fruit accessions that should be investigated further.

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“…The notion of oil accumulation in olive fruits being restricted to a certain threshold, which actually represents the potential oil yield, is well established in the literature (Lavee and Wodner, 1991;Garcia and Mancha, 1992). Furthermore, the literature is rich with reports signifying a threshold of about 0.5 g/g DW for many oil olive cultivars (Beltran et al, 2004;Mailer et al, 2007;Trentacoste et al, 2010;Bakhouche et al, 2014;Rondanini et al, 2014). It is worth noting that higher OPDW values usually relate to oil content in the fruit pulp only (Lavee and Wodner, 1991), and not in the olive paste.…”

Section: Resultsmentioning

confidence: 99%

Olive paste oil content on a dry weight basis (OPDW): an indicator for optimal harvesting time in modern olive orchards

Zipori

Bustan²,

Kerem

et al. 2016

Grasas y Aceites

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SUMMARY:In modern oil olive orchards, mechanical harvesting technologies have significantly accelerated harvesting outputs, thereby allowing for careful planning of harvest timing. While optimizing harvest time may have profound effects on oil yield and quality, the necessary tools to precisely determine the best date are rather scarce. For instance, the commonly used indicator, the fruit ripening index, does not necessarily correlate with oil accumulation. Oil content per fruit fresh weight is strongly affected by fruit water content, making the ripening index an unreliable indicator. However, oil in the paste, calculated on a dry weight basis (OPDW), provides a reliable indication of oil accumulation in the fruit. In most cultivars tested here, OPDW never exceeded ca. 0.5 g·g -1 dry weight, making this threshold the best indicator for the completion of oil accumulation and its consequent reduction in quality thereafter. The rates of OPDW and changes in quality parameters strongly depend on local conditions, such as climate, tree water status and fruit load. We therefore propose a fast and easy method to determine and monitor the OPDW in a given orchard. The proposed method is a useful tool for the determination of optimal harvest timing, particularly in large plots under intensive cultivation practices, with the aim of increasing orchard revenues.The results of this research can be directly applied in olive orchards, especially in large-scale operations. By following the proposed method, individual plots can be harvested according to sharp thresholds of oil accumulation status and pre-determined oil quality parameters, thus effectively exploiting the potentials of oil yield and quality. The method can become a powerful tool for scheduling the harvest throughout the season, and at the same time forecasting the flow of olives to the olive mill. KEYWORDS: Near infrared; Oil yield potential; Olea europaea L; Olive pasteRESUMEN: Contenido de aceite en pasta de aceituna sobre una base de peso seco (OPDW): un indicador del tiempo de cosecha óptimo en modernos olivares. En los modernos olivares, las tecnologías de recogida mecánica han acelerado significativamente la recogida de las cosechas, lo que permite la planificación del momento idóneo de la cosecha. Mientras que la optimización de tiempo de cosecha puede tener importantes efectos en la producción de un aceite de calidad, las herramientas para determinar con precisión la mejor fecha de la cosecha son más bien pobres. Por ejemplo, el indicador de uso común, el índice de maduración de la fruta, no se correlaciona necesariamente con la acumulación de aceite. El contenido de aceite por peso de fruto fresco está estrechamente afectado por el contenido de agua de la fruta, por lo que es un indicador poco fiable. Sin embargo, el aceite en la pasta, calculado sobre una base de peso seco (OPDW), proporciona una indicación fiable de la acumulación de aceite en el fruto. En la mayoría de los cultivares analizados aquí, OPDW nunca excedió 0.5 g·g -1 de peso seco, haciendo ...

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Effect of fruit load on oil yield components and dynamics of fruit growth and oil accumulation in olive (Olea europaea L.)

Cited by 63 publications

References 31 publications

Effect of crop load on the phenological, vegetative and reproductive behavior of the ‘Frantoio’ olive tree (Olea europaea L.)

Effect of crop load on the phenological, vegetative and reproductive behavior of the ‘Frantoio’ olive tree (Olea europaea L.)

Fruit and Endocarp Properties in Relation to Intra-Varietal Morphological Diversity of Montenegrin Olive Variety ‘Žutica’

Olive paste oil content on a dry weight basis (OPDW): an indicator for optimal harvesting time in modern olive orchards

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