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https://www.readbyqxmd.com/read/29161576/unraveling-physiological-biochemical-and-molecular-mechanisms-involved-in-olive-olea-europaea-l-cv-ch%C3%A3-toui-tolerance-to-drought-and-salt-stresses
#1
Mariem Ben Abdallah, Dalila Trupiano, Antonella Polzella, Elena De Zio, Mauro Sassi, Andrea Scaloni, Mokhtar Zarrouk, Nabil Ben Youssef, Gabriella Stefania Scippa
Olive (Olea europaea L.) is an economically important crop for the Mediterranean basin, where prolonged drought and soil salinization may occur. This plant has developed a series of mechanisms to tolerate and grow under these adverse conditions. By using an integrated approach, we described in Chétoui olive cultivar the changes in plant growth, oxidative damage and osmolyte accumulation in leaves, in combination with corresponding changes in physiological parameters and proteome. Our results showed, under both stress conditions, a greater growth reduction of the aboveground plant organs than of the underground counterparts...
November 10, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29149822/olive-leaf-extracts-act-as-modulators-of-the-human-immune-response
#2
Thea Magrone, Anna Spagnoletta, Rosaria Salvatore, Manrico Magrone, Francesco Dentamaro, Matteo Antonio Russo, Graziana Difonzo, Carmine Summo, Francesco Caponio, Emilio Jirillo
BACKGROUND: Olive tree leaves have been used in the Mediterranean area as traditional medicine in virtue of their healthy effects. Olive leaf extracts (OLEs) contain higher amounts of polyphenols than those detected in the extra virgin olive oil and fruit. Several lines of evidence support the cardioprotective, anti-oxidant and anti-inflammatory activities exerted by OLEs. METHODS: Peripheral blood mononuclear cells (PBMCs) from twenty-five healthy donors were cultured in the presence of 3 μg of two OLE extracts, extract A (resuspended in water) and extract B (resuspended in 70% ethanol)...
November 15, 2017: Endocrine, Metabolic & Immune Disorders Drug Targets
https://www.readbyqxmd.com/read/29109370/olive-olea-europaea-l-biophenols-a-nutriceutical-against-oxidative-stress-in-sh-sy5y-cells
#3
Syed Haris Omar, Philip G Kerr, Christopher J Scott, Adam S Hamlin, Hassan K Obied
Plant biophenols have been shown to be effective in the modulation of Alzheimer's disease (AD) pathology resulting from free radical-induced oxidative stress and imbalance of the redox chemistry of transition metal ions (e.g., iron and copper). On the basis of earlier reported pharmacological activities, olive biophenols would also be expected to have anti-Alzheimer's activity. In the present study, the antioxidant activity of individual olive biophenols (viz. caffeic acid, hydroxytyrosol, oleuropein, verbascoside, quercetin, rutin and luteolin) were evaluated using superoxide radical scavenging activity (SOR), hydrogen peroxide (H₂O₂) scavenging activity, and ferric reducing ability of plasma (FRAP) assays...
October 29, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29099642/oleuropein-is-responsible-for-the-major-anti-inflammatory-effects-of-olive-leaf-extract
#4
Khaled Qabaha, Fuad Al-Rimawi, Ahmad Qasem, Saleh A Naser
Olive leaves are rich in polyphenolic compounds that are known to have antioxidant, antimicrobial, and anti-inflammatory activities. Therefore, olive leaf extract (OLE) is considered as a natural supplement. In this study we evaluated the antibacterial and the anti-inflammatory effect of OLE and its individual phenolic components in vitro. Polymorphonuclear cells (PMNCs) were isolated from the whole blood using Histopaque solution and cultured in RPMI-enriched medium. Tumor necrosis factor α (TNFα) level was determined by ELISA after 24 h of lipopolysaccharide stimulation...
November 3, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/29098001/long-term-effect-of-intra-row-spacing-on-growth-and-productivity-of-super-high-density-hedgerow-olive-orchards-cv-arbequina
#5
Maria Gomez-Del-Campo, David J Connor, Eduardo R Trentacoste
Intra-row spacing is known to determine early productivity of super-high density olive orchards depending on growing conditions, cultivar growth characteristics, planting geometry and subsequent pruning management but few experiments have been carried out in this olive hedgerow orchard design. In 2008 an experiment of 4-m spaced hedgerows was established with 8 intra-row spacings (from 1.0 to 2.5 m) in Toledo (Spain) resulting in orchards of density ranging from 2,500 to 1,000 trees ha(-1). Tree growth was evaluated as height, trunk diameter and leaf area during the first 4 years...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29067037/x-fido-an-effective-application-for-detecting-olive-quick-decline-syndrome-with-deep-learning-and-data-fusion
#6
Albert C Cruz, Andrea Luvisi, Luigi De Bellis, Yiannis Ampatzidis
We have developed a vision-based program to detect symptoms of Olive Quick Decline Syndrome (OQDS) on leaves of Olea europaea L. infected by Xylella fastidiosa, named X-FIDO (Xylella FastIdiosa Detector for O. europaea L.). Previous work predicted disease from leaf images with deep learning but required a vast amount of data which was obtained via crowd sourcing such as the PlantVillage project. This approach has limited applicability when samples need to be tested with traditional methods (i.e., PCR) to avoid incorrect training input or for quarantine pests which manipulation is restricted...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29057036/effects-of-chimonanthus-nitens-oliv-leaf-extract-on-glycolipid-metabolism-and-antioxidant-capacity-in-diabetic-model-mice
#7
Hui Chen, Yan Jiang, Zhanwei Yang, Wenbing Hu, Lei Xiong, Ning Wang, Xin Liu, Guodong Zheng, Kehui Ouyang, Wenjun Wang
The paper investigated the antihyperglycemic and antihyperlipidemic efficacy and antioxidant capacity of Chimonanthus nitens Oliv. leaf extract (COE) in combination of high-glucose-fat diet-fed and streptozotocin-induced diabetic model mice. Various physiological indexes in diabetic model mice were well improved especially by oral administration of high dose of COE; the results were listed as follows. Fast blood glucose (FBG) level and serum triglyceride (TC), total cholesterol (TG), low-density lipoprotein cholesterol (LDLC), and malondialdehyde (MDA) as well as MDA in liver were significantly reduced; fasting serum insulin (FINS) and insulin sensitivity index (ISI) were both increased; high-density lipoprotein cholesterol (HDLC) in serum was significantly increased; total antioxidant capacity (T-AOC), activities of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) in serum and liver were apparently enhanced; liver coefficient (LC), liver transaminase, and alkaline phosphatase (ALP) were decreased...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29040757/stomatal-oscillations-in-olive-trees-analysis-and-methodological-implications
#8
Alvaro López-Bernal, Omar García-Tejera, Luca Testi, Francisco Orgaz, Francisco J Villalobos
Stomatal oscillations have long been disregarded in the literature despite the fact that the phenomenon has been described for a variety of plant species. This study aims to characterize the occurrence of oscillations in olive trees (Olea europaea L.) under different growing conditions and its methodological implications. Three experiments with young potted olives and one with large field-grown trees were performed. Sap flow measurements were always used to monitor the occurrence of oscillations, with additional determinations of trunk diameter variations and leaf-level stomatal conductance, photosynthesis and water potential also conducted in some cases...
October 13, 2017: Tree Physiology
https://www.readbyqxmd.com/read/29039078/the-neuroprotective-effects-of-hydro-alcoholic-extract-of-olive-olea-europaea-l-leaf-on-rotenone-induced-parkinson-s-disease-in-rat
#9
Maryam Sarbishegi, Enam Alhagh Charkhat Gorgich, Ozra Khajavi, Gholamreza Komeili, Saeedeh Salimi
Parkinson's disease (PD) is an age-related disease in which dopaminergic neurons in the nigrostriatal pathway are destroyed, resulting in movement and behavioral problems. Oxidative stress and the generation of reactive oxygen species play key roles in neurodegenerative diseases, such as PD. Rotenone (ROT) is a common pesticide that induces oxidative stress. Olive leaves extract (OLE) has antioxidant and neuroprotective effects. Thus, the aim of this study was to investigate the neuroprotective effects of OLE on ROT-induced oxidative stress in the midbrain of a rat model of PD...
October 16, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/29026388/cytotoxicity-testing-of-aqueous-extract-of-bitter-leaf-vernonia-amygdalina-del-and-sniper-1000ec-2-3-dichlorovinyl-dimethyl-phosphate-using-the-alium-cepa-test
#10
Jane Ogoamaka Okwuzu, Peter Odeiga, Olubunmi AdetoroOtubanjo, Oliver Chukwujekwu Ezechi
BACKGROUND: The unrefined nature of the herbal preparations from Vernonia amygdalina (VA) and toxicity potentials of Sniper may both have severe consequences on the biochemical and genetic systems. OBJECTIVES: To assess the microscopic and macroscopic effects of these substances. METHODS: VA leafs and Sniper were prepared and dissolved in distilled water to give different concentrations. Series of baseline tests were carried out to establish concentration range for root growth...
March 2017: African Health Sciences
https://www.readbyqxmd.com/read/28980080/complete-genome-sequence-of-datura-leaf-curl-virus-a-novel-begomovirus-infecting-datura-innoxia-in-sudan-related-to-begomoviruses-causing-tomato-yellow-leaf-curl-disease
#11
Heyam S Mohammed, Marmar A El Siddig, Adil A El Hussein, Jesús Navas-Castillo, Elvira Fiallo-Olivé
Several species in the genus Datura (family Solanaceae) are hosts for begomoviruses (family Geminiviridae), both in the New World and the Old World. Here, we report the genome characterization of two isolates of a novel Old World monopartite begomovirus infecting Datura innoxia in Sudan, which we propose to be named "datura leaf curl virus" (DaLCV). Pairwise sequence comparisons and phylogenetic analysis showed that DaLCV isolates are related to begomoviruses causing tomato yellow leaf curl disease, a global menace for tomato crops...
October 4, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28954421/the-effect-of-consumption-of-citrus-fruit-and-olive-leaf-extract-on-lipid-metabolism
#12
Nicola Merola, Julián Castillo, Obdulio Benavente-García, Gaspar Ros, Gema Nieto
Citrus fruit and olive leaves are a source of bioactive compounds such as biophenols which have been shown to ameliorate obesity-related conditions through their anti-hyperlipidemic and anti-inflammatory effect, and by regulating lipoproteins and cholesterol body levels. Citrolive™ is a commercial extract which is obtained from the combination of both citrus fruit and olive leaf extracts; hence, it is hypothesised that Citrolive™ may moderate metabolic disorders that are related to obesity and their complications...
September 26, 2017: Nutrients
https://www.readbyqxmd.com/read/28935181/comparison-of-multi-leaf-collimator-tracking-and-treatment-couch-tracking-during-stereotactic-body-radiation-therapy-of-prostate-cancer
#13
Stefanie Ehrbar, Simon Schmid, Alexander Jöhl, Stephan Klöck, Matthias Guckenberger, Oliver Riesterer, Stephanie Tanadini-Lang
PURPOSE AND BACKGROUND: Motion mitigation during prostate stereotactic body radiation therapy (SBRT) ensures optimal target coverage while reducing the risk of overdosage of nearby organs. The geometrical and dosimetrical performance of motion mitigation with the multileaf-collimator (MLC tracking) or the treatment couch (couch tracking) were compared. MATERIAL AND METHODS: For ten prostate patients, SBRT treatment plans with integrated boosts were prepared using volumetric modulated arc technique...
September 18, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28934660/antimicrobial-activity-of-some-natural-extracts-encapsulated-within-silica-matrices
#14
Alexandra Duprates Steiner, Alvaro Vargas, Nei Fronza, Adriano Brandelli, João Henrique Zimnoch Dos Santos
Natural extracts (anthocyanins, tannin, anatto, curcuma and olive leaf extracts) were encapsulated within a silica network by acid or base-catalyzed sol-gel methods. The nominal encapsulated contents were between 2.5 and 50wt.-%. The resulting materials were characterized by Fourier transform infrared spectroscopy, diffuse reflectance in the UV region, nitrogen adsorption/desorption porosimetry and small angle X-ray scattering. Encapsulated anthocyanin and tannin afforded inhibition zones between 9-21mm towards Staphylococcus aureus, Escherichia coli, Bacillus cereus, Candida sp...
September 12, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28881013/pencil-graphite-electrodes-for-improved-electrochemical-detection-of-oleuropein-by-the-combination-of-natural-deep-eutectic-solvents-and-graphene-oxide
#15
Federico J V Gomez, Adrian Spisso, María Fernanda Silva
A novel methodology is presented for the enhanced electrochemical detection of oleuropein in complex plant matrices by Graphene Oxide Pencil Grahite Electrode (GOPGE) in combination with a buffer modified with a Natural Deep Eutectic Solvent, containing 10% (v/v) of Lactic acid, Glucose and H2 O (LGH). The electrochemical behavior of oleuropein in the modified-working buffer was examined using differential pulse voltammetry. The combination of both modifications, NADES modified buffer and nanomaterial modified electrode, LGH-GOPGE, resulted on a signal enhancement of 5...
November 2017: Electrophoresis
https://www.readbyqxmd.com/read/28880084/chemical-composition-and-water-permeability-of-fruit-and-leaf-cuticles-of-olea-europaea-l
#16
Hua Huang, Markus Burghardt, Ann-Christin Schuster, Jana Leide, Isabel Lara, Markus Riederer
The plant cuticle, protecting against uncontrolled water loss, covers olive (Olea europaea) fruits and leaves. The present study describes the organ-specific chemical composition of the cuticular waxes and the cutin and compares three developmental stages of fruits (green, turning, and black) with the leaf surface. Numerous organ-specific differences, such as the total coverage of cutin monomeric components (1034.4 μg cm(-2) and 630.5 μg cm(-2)) and the cuticular waxes (201.6 μg cm(-2) and 320.4 μg cm(-2)) among all three fruit stages and leaves, respectively, were detected...
October 11, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28859105/programmed-cell-death-in-acanthamoeba-castellanii-neff-induced-by-several-molecules-present-in-olive-leaf-extracts
#17
Ines Sifaoui, Atteneri López-Arencibia, Carmen Mª Martín-Navarro, María Reyes-Batlle, Carolina Wagner, Olfa Chiboub, Mondher Mejri, Basilio Valladares, Manef Abderrabba, José E Piñero, Jacob Lorenzo-Morales
Therapy against Acanthamoeba infections such as Granulomatous Amoebic Encephalitis (GAE) and Acanthamoeba Keratitis (AK), remains as an issue to be solved due to the existence of a cyst stage which is highly resistant to most chemical and physical agents. Recently, the activity of Olive Leaf Extracts (OLE) was demonstrated against Acanthamoeba species. However, the molecules involved in this activity were not identified and/or evaluated. Therefore, the aim of this study was to evaluate the activity of the main molecules which are present in OLE and secondly to study their mechanism of action in Acanthamoeba...
2017: PloS One
https://www.readbyqxmd.com/read/28808475/yacon-smallanthus-sonchifolius-leaf-extract-attenuates-hyperglycemia-and-skeletal-muscle-oxidative-stress-and-inflammation-in-diabetic-rats
#18
Klinsmann Carolo Dos Santos, Bianca Guerra Bueno, Luana Ferreira Pereira, Fabiane Valentini Francisqueti, Mariana Gobbo Braz, Lahis Fernandes Bincoleto, Lilian Xavier da Silva, Ana Lúcia A Ferreira, Ana Cláudia de Melo Stevanato Nakamune, C-Y Oliver Chen, Jeffrey B Blumberg, Camila Renata Corrêa
The effects of hydroethanolic extract of Yacon leaves (HEYL) on antioxidant, glycemic, and inflammatory biomarkers were tested in diabetic rats. Outcome parameters included glucose, insulin, interleukin-6 (IL-6), and hydrophilic antioxidant capacity (HAC) in serum and IL-6, HAC, malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx) in soleus. The rats (10/group) were divided as follows: C, controls; C + Y, HEYL treated; DM, diabetic controls; and DM + Y, diabetic rats treated with HEYL...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28802847/structural-antioxidant-and-antimicrobial-activities-of-polysaccharides-extracted-from-olive-leaves
#19
Ibtihel Khemakhem, Ola Abdelhedi, Ines Trigui, Mohamed Ali Ayadi, Mohamed Bouaziz
In the present study, hot-water extraction procedure was used to recover polysaccharides from olive leaves. Primary structural characteristics were determined by nuclear magnetic resonance spectroscopy ((1)H NMR and (13)C NMR), Fourier Transform-Infrared spectroscopy (FT-IR) and X-ray diffractometry analysis. Emulsifying capacity, Zeta (ζ) potential and differential scanning calorimetric (DSC) of olive leaf polysaccharides (OLP) were investigated. Antioxidant and antimicrobial activities were then examined...
August 9, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28799642/olive-tree-olea-europaea-l-leaf-as-a-waste-by-product-of-table-olive-and-olive-oil-industry-a-review
#20
REVIEW
Selin Şahin, Mehmet Bilgin
Researches into finding new uses for by-products of table olive and olive oil industry are of great value not only to the economy, but also to the environment where olives are grown and to the human health. Since leaves represent around 10% of the total weight of olives arriving to the mill, it is worth obtaining high added-value compounds from those materials for the preparation of dietary supplements, nutraceuticals, functional food ingredients or cosmeceuticals. In this review article, olive tree (Olea europaea L...
August 11, 2017: Journal of the Science of Food and Agriculture
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