Phenolic profile of hazelnut (<i>Corylus Avellana</i> L.) leaves cultivars grown in Portugal

Amaral, Joana S.; Ferreres, Federico; Andrade, Paula B.; Valentão, Patrı́cia; Pinheiro, Ana Catarina; Santos, Antonio Colmenar; Seabra, Rosa M.

doi:10.1080/14786410410001704778

Cited by 49 publications

(55 citation statements)

References 10 publications

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“…When comparing the results with those previously obtained for Fertille Coutard and M. Bollwiller cultivars (Amaral et al, 2005) it could be noticed that the increase …”

Section: Phenolic Compounds In Hazel Leavessupporting

confidence: 53%

“…38 to 44 g/kg, dry basis (Table 1), which are considerably higher than the values found before for methanolic extracts of the same and other hazel cultivars (Amaral et al, 2005). As observed before, flavonoids were always the major compounds, varying between 71% and 80% of total phenolics (Table 1).…”

Section: Phenolic Compounds In Hazel Leavesmentioning

confidence: 56%

“…In addition, the phenolic composition has already been described by our (Amaral et al, 2005) and another research group (Fraisse, Carnat, Carnat, & Lamaison, 1999) but, as far as we know, nothing has been reported about their antioxidant and antimicrobial potential.…”

mentioning

confidence: 96%

“…1). All these compounds were previously reported to occur in hazel leaves (Amaral et al, 2005), with the exceptions of 4-caffeoylquinic acid and of the unidentified p-coumaric acid derivative.…”

Section: Phenolic Compounds In Hazel Leavesmentioning

confidence: 99%

“…Chromatographic separation was achieved as previously reported (Amaral et al, 2005) with an analytical HPLC unit (Gilson), using a reversed-phase Spherisorb ODS2 (250 Â 4.6 mm, 5 lm particle size, Merck, Darmstadt, Germany) column. The solvent system used was a gradient of water/formic acid (19:1) (A) and methanol (B), starting with 15% methanol and installing a gradient to obtain 30%B at 15 min, 45%B at 30 min, 52.5%B at 40 min and 100%B at 42 min.…”

Section: Hplc-dad Analytical Conditionsmentioning

confidence: 99%

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Hazel (Corylus avellana L.) leaves as source of antimicrobial and antioxidative compounds

et al. 2007

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Aqueous extracts of leaves of different hazel (Corylus avellana L.) cultivars (Cv. M. Bollwiller, Fertille de Coutard and Daviana), were analysed by reversed-phase HPLC/DAD for the definition of their phenolic composition. Antioxidant potential was assessed by the reducing power assay, and the scavenging effect on DPPH (2,2-diphenyl-1-picrylhydrazyl) radicals and b-carotene linoleate model system. Their antimicrobial capacity was also tested against Gram positive (Bacillus cereus, Bacillus subtilis, Staphylococcus aureus) and Gram negative bacteria (Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae) and fungi (Candida albicans, Cryptococcus neoformans). Eight phenolic compounds were identified: 3-, 4-and 5-caffeoylquinic acids, caffeoyltartaric acid, p-coumaroyltartaric acid, myricetin-rhamnoside, quercetin 3-rhamnoside and kaempferol 3-rhamnoside. A p-coumaric acid, three myricetin and one quercetin derivatives were also detected. The hazel leaves extract presented high antioxidant activity in a concentration-dependent way, in general with similar behaviour of all cultivars. Gram positive bacteria revealed to be very sensitive to hazel leaf extract (MIC 0.1 mg/ml for B. cereus and S. aureus and 1 mg/ml for B. subtilis). However, Gram negative and the fungi displayed much lower sensitivity, being P. aeruginosa and C. albicans resistant at 100 mg/ml. Cv. M. Bollwiller exhibited the most potent antimicrobial activity.

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“…When comparing the results with those previously obtained for Fertille Coutard and M. Bollwiller cultivars (Amaral et al, 2005) it could be noticed that the increase …”

Section: Phenolic Compounds In Hazel Leavessupporting

confidence: 53%

Section: Phenolic Compounds In Hazel Leavesmentioning

confidence: 56%

mentioning

confidence: 96%

Section: Phenolic Compounds In Hazel Leavesmentioning

confidence: 99%

Section: Hplc-dad Analytical Conditionsmentioning

confidence: 99%

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Hazel (Corylus avellana L.) leaves as source of antimicrobial and antioxidative compounds

et al. 2007

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Kaolin, Ascophyllum nodosum and salicylic acid mitigate effects of summer stress improving hazelnut quality

et al. 2020

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BACKGROUND: Various strategies are needed to mitigate the negative impact on or to increase fruit quality. The effect of spraying kaolin (K), Ascophyllum nodosum (An) and salicylic acid (SA), in trees with and without irrigation, on quality and sensorial attributes of hazelnut (Grada de Viseu cultivar) was investigated during two consecutive years (2016 and 2017) in a commercial orchard located in Moimenta da Beira, Portugal. RESULTS: The treatments affected positively the biometric parameters nut and kernel weight, length, width, thickness and volume as well as the vitamin E level, antioxidant activity and content of some individual phenolics, such as protocatechuic acid, gallocatechin, catechin and epicatechin. The levels of amino acids in hazelnut kernels decreased in all the assayed treatments, while the kernel colour and sensorial attributes were not affected by the treatments. Hazelnut physical properties (nut and kernels), chemical and phytochemical composition and antioxidant activities were positively related. CONCLUSIONS: The application of K, An and SA improved the hazelnut tree response to climate change, without compromising the hazelnut chemical and sensorial quality. Furthermore, due to the similar observations for the same treatments with and without irrigation, it can be stated that K, An and SA can be efficient and cost-effective tools to mitigate summer stress in rain-fed orchards.

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Analysis of Eleven Phenolic Compounds Including Novel p‐Coumaroyl Derivatives in Lettuce (Lactuca sativa L.) by Ultra‐high‐performance Liquid Chromatography with Photodiode Array and Mass Spectrometry Detection

Ribas-Agustí

Gratacós-Cubarsí

Sárraga

et al. 2011

Phytochemical Analysis

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Phenolic profile of hazelnut (Corylus Avellana L.) leaves cultivars grown in Portugal

Cited by 49 publications

References 10 publications

Hazel (Corylus avellana L.) leaves as source of antimicrobial and antioxidative compounds

Hazel (Corylus avellana L.) leaves as source of antimicrobial and antioxidative compounds

Kaolin, Ascophyllum nodosum and salicylic acid mitigate effects of summer stress improving hazelnut quality

Analysis of Eleven Phenolic Compounds Including Novel p‐Coumaroyl Derivatives in Lettuce (Lactuca sativa L.) by Ultra‐high‐performance Liquid Chromatography with Photodiode Array and Mass Spectrometry Detection

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