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Molecular Advances in Olive and Its Derivatives
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Molecular Advances in Olive and Its Derivatives

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Plant Sciences".

Deadline for manuscript submissions: closed (20 September 2025) | Viewed by 5935

Special Issue Editor

Dr. Fabrizio Carbone

E-Mail Website
Guest Editor
Research Centre for Olive, Fruit and Citrus Crops, Council for Agricultural Research and Economics (CREA), Via Settimio Severo, 83, 87036 Rende, Italy
Interests: genomics; bioinformatics; plant biology; NBT; GWAS; olive breeding; photoperception; ripening; flowering; secondary metabolites
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The olive is a species characterized by phenotypic diversity and wide genetic variability, which allow it to survive in different and complex agro-ecological conditions.

In the coming years, the availability of high-quality reference genomes for this species could facilitate a platform for the isolation and functional characterization of genes via integrated approaches, as well as promoting genome-wide diversity analyses to improve germplasm conservation and breeding programs.

We welcome submissions of original research articles and short communications contributing to the generation of new knowledge and the development of new tools that could be useful in olive improvement, including the characterization of the elements responsible for biological processes (stress resistance, phenology, etc.) and the regulation of metabolic pathways, the identification of new molecular and functional markers useful for genotyping, association studies, assisted breeding and varietal selection, and, finally, the development of regeneration and transformation methods for NBT applications. We also invite submissions of reviews for this Special Issue.

Dr. Fabrizio Carbone
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. International Journal of Molecular Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

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Keywords

  • olive
  • structural and functional genomics
  • genomic variation
  • breeding
  • biotechnologies
  • next-generation sequencing

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Published Papers (4 papers)

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19 pages, 3231 KB  
Article
Population Genetic Structure of Historic Olives (Olea europaea subsp. europaea) from Jordan
by Nawal Alsakarneh, Aseel Abu Kayed, Fadwa Hammouh, Hamad A. Alkhatatbeh, Maysoun S. Qutob, Bayan Alkharabsheh, Wisam M. Obeidat, Ahmad Ateyyeh and Monther T. Sadder
Int. J. Mol. Sci. 2025, 26(22), 10863; https://doi.org/10.3390/ijms262210863 - 9 Nov 2025
Viewed by 1543
Abstract
Major historic olive tree cultivars around the Mediterranean originate from the Jordan area and possess a proven abiotic stress tolerance; however, they were unexplored from the diversity perspective. Therefore, historic olive tree accessions from three northern regions—Irbid (i), Jerash (J), and Ajloun (A)—were [...] Read more.
Major historic olive tree cultivars around the Mediterranean originate from the Jordan area and possess a proven abiotic stress tolerance; however, they were unexplored from the diversity perspective. Therefore, historic olive tree accessions from three northern regions—Irbid (i), Jerash (J), and Ajloun (A)—were analyzed using DNA molecular markers to identify and study their genetic relationships and genetic structure. DNA molecular markers of inter-simple sequence repeats (ISSR) were used. A total of 3150 data entries (859 present and 2291 absent) were generated with fragment sizes ranging from 350 to 2000 bp. Data entries were evaluated with UPGMA and population genetic structure analysis. The results showed that similarity among the investigated sixty-three accessions ranged from 9% between J14 and i20 up to 100% between ‘J11’ and ‘J12’ and between A8 and A9. The discriminating power values for ISSR_807, ISSR_810, and ISSR_825 were 0.70, 0.61, and 0.83, respectively. A generated dendrogram showed ten major clades, while the genetic structure could resolve four unique genetic pools: one for Irbid, one for Jerash, and two for Ajloun. In addition, analysis of 19 phenotypic parameters covering leaf, fruit, stone, and flesh was able to confirm the molecular data. Phenotypic and ISSR data were analyzed using PCA, cluster, and Mantel tests. ISSR markers showed clear genetic differentiation among groups, whereas phenotypic traits displayed lower variation but a significant correlation with molecular diversity. Promising accessions with either pure or admixture genetic makeup were identified. The resolved genetic structure of the investigated historic olive accessions would open new frontiers for olive breeding and utilization, helping to overcome current production challenges and climate change limitations. Full article
(This article belongs to the Special Issue Molecular Advances in Olive and Its Derivatives)
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18 pages, 5657 KB  
Article
The Effects of the Light Spectral Composition on the Development of Olive Tree Varieties Mediated by Photoreceptors
by Ivano Forgione, Ida Quattromano, Teresa Maria Rosaria Regina, Amelia Salimonti and Fabrizio Carbone
Int. J. Mol. Sci. 2025, 26(17), 8319; https://doi.org/10.3390/ijms26178319 - 27 Aug 2025
Cited by 1 | Viewed by 1045 | Correction
Abstract
Plants have the ability to perceive a wide range of light spectra, from which they derive not only the energy required for photosynthesis but also a variety of environmental cues and signals mediated by specific photoreceptors that trigger a cascade of biochemical reactions [...] Read more.
Plants have the ability to perceive a wide range of light spectra, from which they derive not only the energy required for photosynthesis but also a variety of environmental cues and signals mediated by specific photoreceptors that trigger a cascade of biochemical reactions essential for their development. The olive tree (Olea europaea L.) is a woody species for which, despite its agronomic and economic relevance, the influence of light on its development remains poorly understood. The present study, a combined approach was employed, involving the phenotyping of 10 different cultivars exposed exclusively to red light (RL) and blue light (BL) for a period of two months, in addition to the monitoring of expression profiles of 10 photoreceptor-encoding genes in two of the cultivars that exhibited the most contrasting responses to the different light conditions. Our results revealed a correlation between the expression of specific genes and the differential response to exclusive exposure to the two light spectra, highlighting a generally enhanced photosynthetic activity of nearly all cultivars to blue light (BL) and, conversely, a negative response to red light (RL). Taken together, our data, by elucidating the response of the olive to specific light spectra and the underlying molecular mechanisms, pave the way for further studies on these traits, which could be useful for the improvement of this species. Full article
(This article belongs to the Special Issue Molecular Advances in Olive and Its Derivatives)
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23 pages, 6558 KB  
Article
Unravelling Different Water Management Strategies in Three Olive Cultivars: The Role of Osmoprotectants, Proteins, and Wood Properties
by Sara Parri, Claudia Faleri, Marco Romi, José C. del Río, Jorge Rencoret, Maria Celeste Pereira Dias, Sara Anichini, Claudio Cantini and Giampiero Cai
Int. J. Mol. Sci. 2024, 25(20), 11059; https://doi.org/10.3390/ijms252011059 - 15 Oct 2024
Cited by 2 | Viewed by 2010
Abstract
Understanding the responses of olive trees to drought stress is crucial for improving cultivation and developing drought-tolerant varieties. Water transport and storage within the plant is a key factor in drought-tolerance strategies. Water management can be based on a variety of factors such [...] Read more.
Understanding the responses of olive trees to drought stress is crucial for improving cultivation and developing drought-tolerant varieties. Water transport and storage within the plant is a key factor in drought-tolerance strategies. Water management can be based on a variety of factors such as stomatal control, osmoprotectant molecules, proteins and wood properties. The aim of the study was to evaluate the water management strategy under drought stress from an anatomical and biochemical point of view in three young Italian olive cultivars (Giarraffa, Leccino and Maurino) previously distinguished for their physiological and metabolomic responses. For each cultivar, 15 individuals in pots were exposed or not to 28 days of water withholding. Every 7 days, the content of sugars (including mannitol), proline, aquaporins, osmotins, and dehydrins, in leaves and stems, as well as the chemical and anatomical characteristics of the wood of the three cultivars, were analyzed. ‘Giarraffa’ reduced glucose levels and increased mannitol production, while ‘Leccino’ accumulated more proline. Both ‘Leccino’ and ‘Maurino’ increased sucrose and aquaporin levels, possibly due to their ability to remove embolisms. ‘Maurino’ and ‘Leccino’ accumulated more dehydrins and osmotins. While neither genotype nor stress affected wood chemistry, ‘Maurino’ had a higher vessel-to-xylem area ratio and a larger hydraulic diameter, which allows it to maintain a high transpiration rate but may make it more susceptible to cavitation. The results emphasized the need for an integrated approach, highlighting the importance of the relative timing and sequence of each parameter analyzed, allowing, overall, to define a “strategy” rather than a “response” to drought of each cultivar. Full article
(This article belongs to the Special Issue Molecular Advances in Olive and Its Derivatives)
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1 pages, 136 KB  
Correction
Correction: Forgione et al. The Effects of the Light Spectral Composition on the Development of Olive Tree Varieties Mediated by Photoreceptors. Int. J. Mol. Sci. 2025, 26, 8319
by Ivano Forgione, Ida Quattromano, Teresa Maria Rosaria Regina, Amelia Salimonti and Fabrizio Carbone
Int. J. Mol. Sci. 2025, 26(23), 11423; https://doi.org/10.3390/ijms262311423 - 26 Nov 2025
Viewed by 240
Abstract
Missing Data Availability Statement: [...] Full article
(This article belongs to the Special Issue Molecular Advances in Olive and Its Derivatives)
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