scholarly journals Several Isoforms for Each Subunit Shared by RNA Polymerases are Differentially Expressed in the Cultivated Olive Tree (Olea europaea L.)

2021 ◽  
Vol 8 ◽  
Author(s):  
Isabel Fernández-Parras ◽  
Jorge Antolín Ramírez-Tejero ◽  
Francisco Luque ◽  
Francisco Navarro
Keyword(s):  
Olea Europaea ◽  
Expression Profiles ◽  
Expression Patterns ◽  
Olive Tree ◽  
Growth Conditions ◽  
Variable Number ◽  
Rna Polymerases ◽  
Olive Cultivar ◽  
A Genome ◽  
Olea Europaéa

Plants contain five nuclear RNA polymerases, with RNA pols IV and V in addition to conserved eukaryotic RNA pols I, II, and III. These transcriptional complexes share five common subunits, which have been extensively analyzed only in yeasts. By taking advantage of the recently published olive tree cultivar (Olea europaea L. cv. Picual) genome, we performed a genome-wide analysis of the genomic composition corresponding to subunits common to RNA pols. The cultivated olive tree genome is quite complex and contains many genes with several copies. We also investigated, for the first time, gene expression patterns for subunits common to RNA pols using RNA-Seq under different economically and biologically relevant conditions for the cultivar “Picual”: tissues/organs, biotic and abiotic stresses, and early development from seeds. Our results demonstrated the existence of a multigene family of subunits common to RNA pols, and a variable number of paralogs for each subunit in the olive cultivar “Picual.” Furthermore, these isoforms display specific and differentiated expression profiles depending on the isoform and growth conditions, which may be relevant for their role in olive tree biology.

EFFECT OF DIFFERENT IRRIGATION REGIMES ON OLIVE TREE (OLEA EUROPAEA L., 'KORONEIKI') PHYSIOLOGY, YIELD AND FRUIT QUALITY

2011 ◽  
pp. 89-94 ◽  
Author(s):  
G. Psarras ◽  
I. Kasapakis ◽  
E. Stefanoudaki ◽  
I. Papadakis ◽  
K.S. Chartzoulakis
Keyword(s):  
Fruit Quality ◽  
Olea Europaea ◽  
Olive Tree ◽  
Olea Europaea L ◽  
Irrigation Regimes ◽  
Olea Europaéa

scholarly journals CHANGES IN FRUIT YIELD AND PHOTOSYNTHESIS PARAMETERS IN DIFFERENT OLIVE CULTIVARS (Olea europaea L.) UNDER CON-TRASTING WATER REGIMES

2020 ◽  
Vol 19 (3) ◽  
pp. 135-147
Author(s):  
Majid Golmohammadi ◽  
Omid Sofalian ◽  
Mehdi Taheri ◽  
Alireza Ghanbari ◽  
Valiollah Rasoli
Keyword(s):  
Drought Stress ◽  
Olea Europaea ◽  
Principal Component ◽  
Fruit Yield ◽  
Photosynthetic Parameters ◽  
Olive Cultivar ◽  
Drought Treatment ◽  
Olea Europaea L ◽  
Olive Cultivars ◽  
Olea Europaéa

The evergreen tree olive (Olea europaea L.) is the only species of the genus Olea that produces edible fruits with high ecological and economic value. This tree species has developed a series of physiochemical mechanisms to tolerate drought stress and grow under adverse climatic environments. One of these mechanisms is photosynthesis activities, so that as yet little information achieved about the relations between olive production and photosynthetic parameters under drought conditions. An experiment was carried out during two consecutive years (2015–2017) to study the response of 20 different olive tree cultivars (Olea europaea L.) to drought stress. Several parameters like net photosynthetic rate (PN), stomatal conductance (GS), transpiration rate (TE), photosynthetic pigments (total chlorophyll, chlorophyll a, b and carotenoid) and fruit yield were measured. The results of combined analysis of variance for fruit yield and other measured traits showed that year, drought treatment, cultivar main effects and their interactions were highly significant. The results indicated that drought stress reduced all traits, however GS (42.80%), PN (37.21%) and TE (37.17%) significantly affected by drought. Lower reduction in photosynthetic performance (PN, GS and TE) in the cultivar T7 compared to other olive cultivars allowed them to maintain better fruit yield. Principal component analysis (PCA) identified two PCs that accounted for 82.04 and 83.27% of the total variation in photosynthetic parameters under optimal and drought stress conditions, respectively. Taken together, mean comparison, relative changes due to drought and biplot analysis revealed that cultivars ‘T7’, ‘Roghani’, ‘Koroneiki’, ‘Korfolia’ and ‘Abou-satl’ displayed better response against drought stress. According to our results, one olive cultivar namely ‘T7’, could be used in olive breeding programs to improve new high yielding cultivars with drought tolerance for use in the drought-prone environments.

scholarly journals Advances in biocultural geography of olive tree (Olea europaea L.) landscapes by merging biological and historical assays

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Giuseppe Russo ◽  
Isacco Beritognolo ◽  
Marina Bufacchi ◽  
Vitale Stanzione ◽  
Andrea Pisanelli ◽  
...  
Keyword(s):  
Olea Europaea ◽  
Olive Tree ◽  
Olea Europaea L ◽  
Olea Europaéa

scholarly journals Endophytic Fungi of Olive Tree

2020 ◽  
Vol 8 (9) ◽  
pp. 1321 ◽  
Author(s):  
Rosario Nicoletti ◽  
Claudio Di Vaio ◽  
Chiara Cirillo
Keyword(s):  
Plant Growth ◽  
Sustainable Agriculture ◽  
Endophytic Fungi ◽  
Olea Europaea ◽  
Scientific Community ◽  
Olive Tree ◽  
General Interest ◽  
Symbiotic Interactions ◽  
Crop Cycle ◽  
Olea Europaéa

In addition to the general interest connected with investigations on biodiversity in natural contexts, more recently the scientific community has started considering occurrence of endophytic fungi in crops in the awareness of the fundamental role played by these microorganisms on plant growth and protection. Crops such as olive tree, whose management is more and more frequently based on the paradigm of sustainable agriculture, are particularly interested in the perspective of a possible applicative employment, considering that the multi-year crop cycle implies a likely higher impact of these symbiotic interactions. Aspects concerning occurrence and effects of endophytic fungi associated with olive tree (Olea europaea) are revised in the present paper.

scholarly journals Genetic Resources of Olea europaea L. in the Garda Trentino Olive Groves Revealed by Ancient Trees Genotyping and Parentage Analysis of Drupe Embryos

Genes ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 1171
Author(s):  
Paula Moreno-Sanz ◽  
Luca Lombardo ◽  
Silvia Lorenzi ◽  
Franco Michelotti ◽  
Maria Stella Grando
Keyword(s):  
Genetic Resources ◽  
Olea Europaea ◽  
Virgin Olive Oil ◽  
Olive Tree ◽  
Extra Virgin Olive Oil ◽  
Parentage Analysis ◽  
Fruit Production ◽  
Olea Europaea L ◽  
Genetic Profiles ◽  
Olea Europaéa

The area of the Garda Lake within the Trentino province (north of Italy) is the northernmost part of Europe where the Mediterranean species Olea europaea L. is traditionally cultivated. ‘Casaliva’ is claimed as the main variety traditionally grown in the Garda Trentino area (GT) from which a world renowned niche extra virgin olive oil is produced. Since a dominant presence of ‘Casaliva’ would link the fruit set success and yield to a self-pollination compatibility system, a deep genetic survey of the olive tree population in the GT has been performed with the aim of establishing the actual varietal composition and of understanding from which pollen donor the ‘Casaliva’ olives originate. Forty-four different genetic profiles were observed among the 205 leaf samples collected from 106 ancient trees through the analysis of 20 nuclear microsatellite markers. The varietal composition in modern orchards was also explored and the vast majority of the additional 151 trees analyzed showed the same genotype as the ancient accessions of ‘Casaliva’. The results support the long historical link of ‘Casaliva’ with the GT and, besides a high varietal homogeneity, they also revealed the presence of olive genetic resources essential to fruit production. In fact, the parentage analysis of 550 embryos from drupes of ‘Casaliva’ evidenced that a cross-fertilization system is favored and a list of candidate cultivars most suitable as local pollinizers of ‘Casaliva’ was identified.

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