Study of energetic properties of different tree organs in six Olea europaea L. cultivars

AbstractPruning is an important horticultural practice for the management of olive orchards (Olea europaea L.) that generates a considerable amount of residues every year. Olive orchards are increasingly expanding beyond the Mediterranean Basin to new growing Countries (Australia, California, Argentina, Chile and Uruguay) and this will certainly lead to larger availability of pruning material. Currently, the interest in use of olive tree pruning residues for energy purposes is increasing but unfortunately, the information on the differences among organs of the tree, in terms of calorific value and ash content, is scarce. Another unknown aspect is the effect of cultivar vigour on dry matter partition among different tree organs, these are important traits to establish the energetic quality of pruning residues. The aim of this research was to study energetic aspects of six olive cultivars, largely grown in the Sicilian olive industry and characterized by different vigour. The trees taken into consideration in the study were selected in an experimental orchard to avoid any effect due to differences in environmental conditions and management. The energetic characteristics, calorific value and ash content, were evaluated for the various tree organs particularly shoots, leaves and branches; also root system was evaluated, although the roots can only be used once the trees are uprooted. Significant differences were observed in the calorific values among the different tree organs and the cultivars. Regarding the ash, shoots and leaves showed the highest content with respect to the other organs, thus causing a possible tendency in slagging with fouling and corrosion of boiler components.

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How to Choose a Good Marker to Analyze the Olive Germplasm (Olea europaea L.) and Derived Products

Genes ◽

10.3390/genes12101474 ◽

2021 ◽

Vol 12 (10) ◽

pp. 1474

Author(s):

Sara Sion ◽

Michele Antonio Savoia ◽

Susanna Gadaleta ◽

Luciana Piarulli ◽

Isa Mascio ◽

...

Keyword(s):

Molecular Markers ◽

Olea Europaea ◽

Dna Analysis ◽

Olive Tree ◽

Olea Europaea L ◽

Varietal Identification ◽

Olive Cultivars ◽

History Of ◽

The Impact ◽

Olea Europaéa

The olive tree (Olea europaea L.) is one of the most cultivated crops in the Mediterranean basin. Its economic importance is mainly due to the intense production of table olives and oil. Cultivated varieties are characterized by high morphological and genetic variability and present a large number of synonyms and homonyms. This necessitates the introduction of a rapid and accurate system for varietal identification. In the past, the recognition of olive cultivars was based solely on analysis of the morphological traits, however, these are highly influenced by environmental conditions. Therefore, over the years, several methods based on DNA analysis were developed, allowing a more accurate and reliable varietal identification. This review aims to investigate the evolving history of olive tree characterization approaches, starting from the earlier morphological methods to the latest technologies based on molecular markers, focusing on the main applications of each approach. Furthermore, we discuss the impact of the advent of next generation sequencing and the recent sequencing of the olive genome on the strategies used for the development of new molecular markers.

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An in vitro nutritive evaluation of olive tree (Olea europaea) pruning residues as affected by cutting regimen

Bioresource Technology ◽

10.1016/j.biortech.2011.09.130 ◽

2012 ◽

Vol 103 (1) ◽

pp. 234-238 ◽

Cited By ~ 2

Author(s):

M.R. Al-Masri

Keyword(s):

Olea Europaea ◽

Olive Tree ◽

Pruning Residues ◽

Olea Europaéa

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Floral Behavior, Fruit Characteristics and Oil Quality of Some Olive Cultivars "Olea europaea L."

Egyptian Journal of Horticulture ◽

10.21608/ejoh.2019.11082.1103 ◽

2019 ◽

Vol 46 (1) ◽

pp. 155-168

Author(s):

Zienab Ahmed ◽

Eman Taha ◽

Naglaa Abd-Elkarim

Keyword(s):

Olea Europaea ◽

Oil Quality ◽

Fruit Characteristics ◽

Olea Europaea L ◽

Olive Cultivars ◽

Olea Europaéa

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Assessment of the genetic relationship of Turkish olives (Olea europaea subsp. europaea) cultivars based on cpDNA trnL-F regions

Acta Botanica Croatica ◽

10.1515/botcro-2017-0019 ◽

2018 ◽

Vol 77 (1) ◽

pp. 88-92 ◽

Cited By ~ 2

Author(s):

Ergun Kaya ◽

Recep Vatansever ◽

Ertugrul Filiz

Keyword(s):

Genetic Relationship ◽

Olea Europaea ◽

Phylogenetic Analyses ◽

Olive Tree ◽

Sequence Length ◽

Mediterranean Countries ◽

Olive Cultivars ◽

Content Variable ◽

Relationship Of ◽

Olea Europaéa

AbstractThe olive tree (Olea europaeaL.) is one of the major cultivated species in the world, and Mediterranean countries produce about 90% of world cultivated olives. In this study, the genetic relationship of seven Turkish olive cultivars was investigated using non-codingtrnL-Fregions in chloroplastic genome. Cultivars demonstrated a similar sequence length of 330-340 bp with an average 35.26% G+C content. Variable (polymorphic/segregating), parsimony informative and total numbers of the insertion or the deletion of bases in the DNA (indel sites) were 4, 3, and 28, respectively. Nucleotide diversities π and θ were found as 0.00631 and 0.00644 respectively, while Tajima’s D was −0.786. cpDNAtrnL-Fregions of sequenced Turkish olive cultivars had a low level of genetic variations, and these non-coding regions were strictly conserved in all analyzed cultivars. Geographically distant shared more sequence similarities than relatively close cultivars. The phylogenetic analyses indicated that the biogeographic distribution of cultivars does not demonstrate any association inferring cultivar source. These results indicate the possibility of germplasm exchanges among countries or that some indel mutations contribute to variations of the Turkish olive gene pool. Thus, the authorities should develop the necessary programs to preserve the purity of native germplasms.

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Productivity and Fruit Quality of Manzanello and Picual Olive (Olea europaea L.) Cultivars as Influenced by Spraying Lithovit under Different Irrigation Levels

Asian Journal of Soil Science and Plant Nutrition ◽

10.9734/ajsspn/2019/v5i430071 ◽

2020 ◽

pp. 1-11

Author(s):

I. M. Dobiea ◽

H. E. M. El-Badawy ◽

A. A. H. Hegazy ◽

S. F. El-Gioushy

Keyword(s):

Water Stress ◽

Fruit Quality ◽

Olea Europaea ◽

High Stress ◽

Olive Tree ◽

Physical Characteristics ◽

Irrigation Level ◽

Irrigation Levels ◽

Olea Europaéa

Olive tree is the favorable choice to cultivate in desert lands due to high stress tolerance of its tree. Although olive tree tolerates the low availability of water in the soil by means of morphological, physiological and biochemical adaptations, the Productivity and fruit quality of it decrease gradually with increasing water stress. So we have initiated this study to follow up the effect of spraying Lithovit (Ca CO3 & Mg CO3) on the productivity and fruit quality of Picual and Manzanello olives which exposure to different irrigation levels. Four concentrations of Lithovit were sprayed on olive (Olea europaea var. Manzanello) trees (0, 2, 4 and 6 g/L) under three irrigation levels (50, 75 and 100% of evapotranspiration for crop “ETc”) during 2017, 2018 seasons. Spraying Lithovit at 6 g/L recorded the highest values of all fruit physical characteristics of both cultivars in the two seasons. Furthermore, 2 g/L had the highest values of retained fruit percentage of both cultivars which led to increase the yield in the first and second seasons. Concerning irrigation levels, the values of fruit physical characteristics of both cultivars were the lowest values with applying 50% of ETc irrigation level. These values increased with decreasing water stress in the first and second seasons. Concerning retained fruit percentage and yield of Picual and Manzanello, the most promising level of irrigation was 75% of ETc level because it recorded the highest values of yield. Moreover 100% of ETc enhanced the fruit quality.

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