Kernel oil content and oil composition in walnut (<scp><i>Juglans regia</i></scp> L.) accessions from north‐eastern Italy

Poggetti, Luca; Ferfuia, Claudio; Chiabà, Cristina; Testolin, R.; Baldini, Mario

doi:10.1002/jsfa.8542

Cited by 66 publications

(62 citation statements)

References 29 publications

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“…The oleic acid content of the eastern area (average value: 15.82%) was lower than the southwestern area and the northwestern area (average value: 19.56% and 19.98%, respectively). Poggetti et al () found that the oleic acid content and the daily temperature had a significant linear relationship and positive correlation. The average air temperature of the eastern area was lower than others, which exhibited the same tendency.…”

Section: Resultsmentioning

confidence: 97%

Chemical Compositions of Walnut (Juglans regia L.) Oils from Different Cultivated Regions in China

Gao

Jin

Liu

et al. 2018

J Americ Oil Chem Soc

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This study is a comprehensive report on the quality of Chinese walnut oil, which enriches the research of oil resources. A total of 16 walnut samples from China were selected, and walnut oils were obtained using the pressing process. The lipid compositions and micronutrient contents were analyzed. The fatty acids corresponded to palmitic acid (3.05–8.25%), oleic acid (12.56–26.03%), linoleic acid (51.21–68.97%), and linolenic acid (6.83–15.01%), and the main triacylglycerols were trilinolein (27.87–39.47%), followed by oleoyl‐linoleoyl‐linolenoyl‐glycerol (17.07–24.18%), dilinoleoyl‐oleoyl‐glycerol (9.65–15.46%), palmitoyl‐dilinoleoyl‐glycerol (5.96–14.98%), and dilinoleoyl‐linolenoyl‐glycerol (6.42–12.43%). In addition, high amounts of micronutrients, including phytosterol, squalene, tocopherol, and total phenolic content, were found in walnut oils ranging from 540 to 1594, 17 to 131, 345 to 1280, and 1.04 to 20.39 mg kg−1 among different samples, respectively. The differences in the geographical location and climate caused different regions of cultivation, which resulted in the differences in the chemical composition of walnut oil. Further multiple linear regression analyses between oxidative stability indices, fatty‐acid compositions, and micronutrients revealed that linoleic acid (R = −0.891; P < 0.05), α‐tocopherol (R = 0.713; P < 0.05), and total phenolic content (R = 0.369; P < 0.05) were the main factors that affect the oxidative stability of the walnut oil.

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Section: Resultsmentioning

confidence: 97%

Chemical Compositions of Walnut (Juglans regia L.) Oils from Different Cultivated Regions in China

Gao

Jin

Liu

et al. 2018

J Americ Oil Chem Soc

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“…Moreover, Juglans oil also affects endocrine factors associated with artherosclerosis or chronic inflammation . The beneficial health effects of Juglans oil have been mainly attributed to its high ω‐3 and ω‐6 fatty acids content that are essential for the human diet . It contains more than 70% of polyunsaturated fatty acids (PUFA) and other minor components such as L‐arginine.…”

Section: Introductionmentioning

confidence: 99%

Potential immunomodulatory and antioxidant effects of walnut Juglans regia vegetable oil against lead‐mediated hepatic damage and their interaction with lipase activity in rats

Soussi

Feki

2018

Environmental Toxicology

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Environmental pollutants, particularly lead, pose a serious threat to human and animal health that causes disturbances of several functions, including hepatotoxicity. Therefore, the search for a new treatment that could safely and effectively block or reverse liver injuries remains a challenge. This study was carried out to investigate the protective efficacy of Juglans regia vegetable oil (JRVO) against the hepatotoxicity induced by lead. To achieve this aim, adults male rats were treated for 10 days with Pb (0.344 g/kg bw) associated or not with JRVO (0.9 g/kg bw). The rats intoxicated by lead exhibited oxidative stress determined by TBARS, protein carbonyls, liver tumor necrosis factor‐α (TNF‐α), caspase‐3, and antioxidant status: SOD, CAT, GPx, and GSH. Administration of lead increased the levels of plasma hepatic markers (AST, ALT, LDH) and bilirubin, the lipid profiles (total cholesterol, triglycerides, VLDL‐Ch, LDL‐Ch levels, TBARS, NOx, and PCO), the plasmatic lipase activity and the inflammatory markers, while the plasmatic ALP decreased. Coadministration of JRVO restored all the hepatic markers, the lipid profiles and the antioxidants to near‐normal values and lowered the plasmatic lipase activity as well as the elevated thiobarbituric acid reactive substances. Hepatic histological studies confirmed the beneficial role of JRVO through the amelioration of all biochemical parameters. Our results suggest that Juglans regia vegetable oil contains promising substances to counteract the lead intoxication and may be efficient in the prevention of hepatotoxicity complications.

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“…The trees were not from commercial varieties. The same trees have been previously characterized by molecular methods (Vischi et al, ) while their fruits have already been analysed by morphological and carpological methods as well as for oil content and composition (Poggetti et al, ). The trees are grouped into five geographically and climatic homogeneous areas: (a) the western Alpine highlands (“Carnic Alps”), (b) the eastern Alpine highlands (“Julian Alps”), (c) the eastern hilly and low mountain area (“Torre and Natisone valleys”), (d) the broad central and southern plains area (“Friuli plains”) and (e) the south‐eastern carbonate plateau (“Trieste Karst”).…”

Section: Methodsmentioning

confidence: 99%

“…The trees were not from commercial varieties. The same trees have been previously characterized by molecular methods (Vischi et al, 2017) while their fruits have already been analysed by morphological and carpological methods as well as for oil content and composition (Poggetti et al, , 2018. The trees are grouped into five geographically and climatic homogeneous areas: (a) the western Alpine highlands Table S1).…”

Section: Studied Walnut Treesmentioning

confidence: 99%

“…In recent years, new common walnut orchards have been planted in northern Italy using commercial varieties, especially in lowland areas, and these have produced good economic results for farmers (Valentini, Contessa, & Botta, 2015). In FVG, the prospects are also encouraging and recent studies have described different walnut accessions that show great promise due to the quality of the fruits (Poggetti, Ermacora, Cipriani, Pavan, & Testolin, 2017;Poggetti, Ferfuia, Chiabà, Testolin, & Baldini, 2018;Vischi et al, 2017).…”

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confidence: 99%

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Altitude affects the distribution and abundance of two non‐native insect pests of the common walnut

Poggetti

Raranciuc

Chiabà

et al. 2019

J Applied Entomology

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The leaf miner Coptodisca lucifluella and the carpophagous Rhagoletis completa, of American origin, are two non‐native walnut (Juglans spp.) pests in Italy. For the Friuli Venezia Giulia region (FVG) (N‐E Italy), C. lucifluella is not yet listed, while R. completa has been present for over 25 years. During 2015, samples of leaves and fruits were collected from 219 single old common walnut trees (Juglans regia) placed at different altitudes (0–1,073 m a.s.l.) in FVG to detect the distribution and abundance of both pests. Samples of leaf miner larvae and their parasitoids were subjected to mitochondrial DNA analysis for identification. C. lucifluella has been found in 55 out of 219 sites. The species has been identified by typical leaf symptoms and by its DNA barcode. This is the first report of the species for FVG. The leaf miner distribution was negatively correlated with altitude. The species has not been observed at sites over 600 m a.s.l. Larvae were parasitized by native parasitoids identified as belonging to the genus Chrysocharis by morphological features and by DNA barcode. R. completa has been found in 89 out of 165 sites on walnut trees with fruits. The infestation level was very high in lowland localities. At sites over 700 m a.s.l., no infestation was found. Both species are widespread in the region, and their occurrence is significantly affected by altitude. Data suggest that walnut trees could be cultivated in some mountain areas without the need to control R. completa with insecticides.

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Kernel oil content and oil composition in walnut (Juglans regia L.) accessions from north‐eastern Italy

Cited by 66 publications

References 29 publications

Chemical Compositions of Walnut (Juglans regia L.) Oils from Different Cultivated Regions in China

Chemical Compositions of Walnut (Juglans regia L.) Oils from Different Cultivated Regions in China

Potential immunomodulatory and antioxidant effects of walnut Juglans regia vegetable oil against lead‐mediated hepatic damage and their interaction with lipase activity in rats

Altitude affects the distribution and abundance of two non‐native insect pests of the common walnut

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