Polyphenol metabolic diversity of Chinese peach and nectarine at thinned and ripe stages by UPLC-ESI-Q-TOF-MS combined with multivariate statistical analysis
Publication date: Available online 18 April 2020Source: Journal of Food Composition and AnalysisAuthor(s): Chongting Guo, Jinfeng Bi, Xuan Li, Jian Lyu, Xinye Wu, Ye Xu (Source: Journal of Food Composition and Analysis)
Source: Journal of Food Composition and Analysis - April 19, 2020 Category: Food Science Source Type: research
Viruses, Vol. 12, Pages 246: Updating the Quarantine Status of Prunus Infecting Viruses in Australia
Constable
One hundred Prunus trees, including almond (P. dulcis), apricot (P. armeniaca), nectarine (P. persica var. nucipersica), peach (P. persica), plum (P. domestica), purple leaf plum (P. cerasifera) and sweet cherry (P. avium), were selected from growing regions Australia-wide and tested for the presence of 34 viruses and three viroids using species-specific reverse transcription-polymerase chain reaction (RT-PCR) or polymerase chain reaction (PCR) tests. In addition, the samples were tested using some virus family or genus-based RT-PCR tests. The following viruses were detected: Apple chlorotic leaf spot virus (...
Source: Viruses - February 22, 2020 Category: Virology Authors: Wycliff M. Kinoti Narelle Nancarrow Alison Dann Brendan C. Rodoni Fiona E. Constable Tags: Article Source Type: research
The pH-Responsive Transcription Factor PacC Governs Pathogenicity and Ochratoxin A Biosynthesis in Aspergillus carbonarius
In this study, we characterized the functions and addressed the role of PacC-mediated pH signaling in A. carbonarius pathogenicity using designed pacC gene knockout mutant. ΔAcpacC mutant displayed an acidity-mimicking phenotype, which resulted in impaired fungal growth at neutral/alkaline pH, accompanied by reduced sporulation and conidial germination compared to the wild type (WT) strain. The ΔAcpacC mutant was unable to efficiently acidify the growth media as a direct result of diminished gluconic and citric acid production. Furthermore, loss of AcpacC resulted in a complete inhibition of OTA production at pH 7.0. Add...
Source: Frontiers in Microbiology - February 12, 2020 Category: Microbiology Source Type: research
Effect of the added polysaccharide on the release of thyme essential oil and structure properties of chitosan based film
Publication date: March 2020Source: Food Packaging and Shelf Life, Volume 23Author(s): Huan Lian, Jingying Shi, Xiaoyan Zhang, Yong PengAbstractIn order to evaluate the effects of microbial polysaccharides and plant polysaccharides on the release of essential oil from chitosan-based composite films, the xanthan gum, pullulan, gum tragacanth and arabic gum were used to prepare the chitosan-thyme essential oil composite films. The results showed that the addition of four polysaccharides reduced the tensile strength and swelling degree, but increased the film solubility. The addition of arabic gum and pullulan delayed the rel...
Source: Food Packaging and Shelf Life - January 13, 2020 Category: Food Science Source Type: research
Genes, Vol. 10, Pages 1033: Labeling of Monilinia fructicola with GFP and Its Validation for Studies on Host-Pathogen Interactions in Stone and Pome Fruit
ta De Cal
To compare in vivo the infection process of Monilinia fructicola on nectarines and apples using confocal microscopy it is necessary to transform a pathogenic strain with a construct expressing a fluorescent chromophore such as GFP. Thus, germinated conidia of the pathogen were transformed with Agrobacterium tumefaciens carrying the plasmid pPK2-hphgfp that allowed the expression of a fluorescent Hph-GFP chimera. The transformants were selected according to their resistance to hygromycin B, provided by the constitutive expression of the hph-gfp gene driven by the glyceraldehyde 3P dehydrogenase promoter of Asp...
Source: Genes - December 10, 2019 Category: Genetics & Stem Cells Authors: Silvia Rodr íguez-Pires Eduardo Antonio Espeso Nuria Bar ó-Montel Rosario Torres Paloma Melgarejo Antonieta De Cal Tags: Article Source Type: research
Evaluation of Anti-inflammatory, Antinociceptive, and Antipyretic Activities of Prunus persica var. nucipersica (Nectarine) Kernel
Planta Med DOI: 10.1055/a-0955-5876Nectarine (Prunus persica var. nucipersica) is a worldwide appreciated edible subspecies, with a high nutritional value and benefits on human health due to its phenolic content. Despite the large consumption of the fruit, the potential use of its kernel is poorly studied. Herein, the potential pharmacological activities and the phenolic constituents of an alcoholic extract of kernel nectarine fruits were investigated. Administering nectarine kernel extract (50 and 100 mg/kg, respectively) in rats reduced paw edema after carrageenan injection by 11 and 47% in 1 h, 24 and 33% in 2 h, ...
Source: Planta Medica - June 17, 2019 Category: Drugs & Pharmacology Authors: Elshamy, Abdelsamed Ibrahim Abdallah, Heba Mohammed Ibrahim El Gendy, Abd El-Nasser Gaber El-Kashak, Walla Muscatello, Beatrice De Leo, Marinella Pistelli, Luisa Tags: Original Papers Source Type: research
Relationship between fruit density and quality parameters, levels of sugars, organic acids, bioactive compounds and volatiles of two nectarine cultivars, at harvest and after ripening
In this study, fruits of two nectarine cultivars, harvested at commercial ripeness, were sorted into three density groups. Physicochemical parameters (mean weight, firmness, dry matter, soluble solids content, titratable acidity) and the levels of sugars, organic acids, vitamin C, polyphenols and volatiles were then determined at harvest and after ripening. A sensory ranking test was also performed on ripened nectarines to compare quality attributes (firmness, sweetness, acidity, and aroma). In both cultivars, ripened nectarines of higher density had significantly higher levels of dry matter, soluble solids content, sugars...
Source: Food Chemistry - June 7, 2019 Category: Food Science Source Type: research
Fuzzy thinking (continued)
Publication date: 13 April 2019Source: New Scientist, Volume 242, Issue 3225Author(s): What is the function of the fuzz on the skin of a peach? And is a nectarine a bald peach or a peach a fuzzy nectarine? (Source: New Scientist)
Source: New Scientist - April 14, 2019 Category: Science Source Type: research
A novel noninvasive and cost-effective handheld detector on soluble solids content of fruits
Publication date: Available online 26 March 2019Source: Journal of Food EngineeringAuthor(s): Wenchuan Guo, Weiqiang Li, Biao Yang, ZhuoZhuo Zhu, Dayang Liu, Xinhua ZhuAbstractSoluble solids content (SSC) is an important parameter for determining sweetness, maturity, and price of fruits. A fast, noninvasive, and cost-effective portable SSC detector is appreciated by fruit planters, processers, sellers, and consumers. The study developed a handheld non-destructive SSC detector which mainly consisted of a visible/near-infrared (Vis/NIR) micro-spectrometer over the wavelength of 650–1100 nm, a Raspberry Pi board, a micro-...
Source: Journal of Food Engineering - March 27, 2019 Category: Food Science Source Type: research
Near-freezing temperature storage enhances chilling tolerance in nectarine fruit through its regulation of soluble sugars and energy metabolism
Publication date: Available online 19 March 2019Source: Food ChemistryAuthor(s): Handong Zhao, Wenxiao Jiao, Kuanbo Cui, Xinguang Fan, Chang Shu, Wangli Zhang, Jiankang Cao, Weibo JiangAbstractTo avoid chilling injury (CI) of nectarines during storage, the impact of near-freezing temperature (NFT) (–1.4±0.1°C), 0±0.1°C and 5±0.1°C on CI incidence, ion leakage, levels of soluble sugars and enzymatic activities related to soluble sugars and energy metabolism, were investigated over five weeks. NFT-stored fruit showed no CI symptoms and significantly (P<0.05) lower increase of ion leakage than those kept at 0 and ...
Source: Food Chemistry - March 20, 2019 Category: Food Science Source Type: research
Different molecular weights chitosan coatings delay the senescence of postharvest nectarine fruit in relation to changes of redox state and respiratory pathway metabolism
Publication date: Available online 12 March 2019Source: Food ChemistryAuthor(s): Wanli Zhang, Handong Zhao, Jing Zhang, Zhongting Sheng, Jiankang Cao, Weibo JiangAbstractThe aim of this study is to investigate the impact of different molecular weights of chitosan treatment (LM 30kDa; HM 120kDa) on fruit senescence related to redox state and respiratory pathway metabolism in postharvest nectarine fruit stored at 25 °C for 8 days. The treatments of LM and HM chitosan both delayed senescence, which are due to inhibition of respiration rate, and enhanced the antioxidant system, as evidenced by the improvement of ASA-GSH cycle...
Source: Food Chemistry - March 16, 2019 Category: Food Science Source Type: research
Human health safety studies of a new insecticide: Dissipation kinetics and dietary risk assessment of afidopyropen and one of its metabolites in cucumber and nectarine
Publication date: Available online 18 January 2019Source: Regulatory Toxicology and PharmacologyAuthor(s): Jun Xie, Yunxi Zheng, Xingang Liu, Fengshou Dong, Jun Xu, Xiaohu Wu, Mingshan Ji, Yongquan ZhengAbstractTo preliminarily study the law of natural dissipation and the relation to human health of a new insecticide (afidopyropen), the QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) method and a UHPLC-MS/MS system were used to extract and detect the afidopyropen and its metabolite (M440I007) from cucumber and nectarine. The limits of quantitation (LOQs) of both target compounds in two matrixes were reduced to 0....
Source: Regulatory Toxicology and Pharmacology - January 18, 2019 Category: Toxicology Source Type: research
Ultrasound-assisted vacuum drying of nectarine
The objective of this work was to evaluate the influence of ultrasonic waves and vacuum, combined or not, on the drying kinetics at 60 °C and the impact in terms of fruit quality, through the following techniques: ultrasonic assisted drying (USD), vacuum drying (VD), ultrasonic assisted vacuum drying (USVD) and control drying (CD). Six different semi-theoretical drying mathematical models were compared based on their coefficient of determination and mean square error to characterize the drying curves. The application of the USVC technique resulted in a higher rate drying kinetics and a reduction of the process time abov...
Source: Journal of Food Engineering - November 14, 2018 Category: Food Science Source Type: research
Food-dependent, exercise-induced anaphylaxis in a patient allergic to peach.
We present an interesting case of a 25-year-old female patient with recurrent anaphylactic reactions developing after eating various foods, particularly in presence of co-factors of allergic reactions. Symptoms occurred after consumption of various kinds of foods - peach, pancakes with cottage cheese and fruit, a meal from a Chinese restaurant - all eaten on other occasions without symptoms. During diagnosis, skin prick tests were negative for all tested allergen extracts (both inhalatory and food) from Allergopharma. Prick by prick tests were positive for the peach - wheal diameter - 6 mm, nectarine - 4 mm (histamine ...
Source: International Journal of Immunopathology and Pharmacology - October 3, 2018 Category: Allergy & Immunology Tags: Int J Immunopathol Pharmacol Source Type: research
Red clover-associated luteovirus – a newly classifiable member of the genus Luteovirus with an enamo-like P5 protein
This study reports the complete genomic sequence of a novel virus isolated from red clover. According to its genomic organization, its similarity to luteoviruses, and a greater than 10% difference in all genes, this virus isolate likely represents a new luteovirus species. As seen in nectarine stem pitting-associated virus (NSPaV) and NSPaV-South Korea (SK) luteoviruses, it differs from typical luteoviruses through the absence of ORF3a and ORF4 encoding movement proteins. Furthermore, its P5 protein (responsible for aphid transmission) is more similar to the P5 of enamoviruses than that of luteoviruses. The virus isolate h...
Source: Archives of Virology - August 24, 2018 Category: Virology Source Type: research
