Identification and quantification of biochemical composition and antioxidant activity of walnut pollens

Okatan, Volkan; Bulduk, İbrahim; Kaki, Barış; Gündeşli, Muhammet Ali; Usanmaz, Serhat; Alas, Turgut; Helvacı, Murat; Kahramanoğlu, İbrahim; Hajizadeh, Hanifeh Seyed

doi:10.30848/pjb2021-6(44)

Cited by 7 publications

(10 citation statements)

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“…The information regarding the phytochemical profile of the pollen of J. regia is very limited. We have identified only one report that describes the chemical composition of different pollens of walnut cultivars and our results are not completely in agreement with it, although a very similar method for polyphenol extraction has been used [14]. In the cited work, the authors analyzed pollen from walnut flowers growing in Turkey.…”

Section: Identification and Quantification Of Phenolic Compoundsmentioning

confidence: 69%

“…So far, the total content of polyphenolic compounds and flavonoids has been estimated only by two authors. Okatan et al [ 14 ] assessed the concentration of these two groups of compounds in the range of 5.05 to 11.03 mg GAE/g and 1.53 to 4.12 mg QE/g, respectively, while Cosmulescu et al [ 15 ] studied a range between 10.80 and 17.64 mg GAE/g and 7.32 and 7.95 mg QE/g, respectively. The values estimated in our own research compared to the cited studies were several dozen times higher, which indicates a high pro-health value of J. regia pollen.…”

Section: Resultsmentioning

confidence: 99%

“…Previously, the antioxidant activity of J. regia pollen was assessed using the DPPH method only [ 14 , 15 ]. Unfortunately, the obtained values are expressed in other units than in this paper and therefore, they cannot be compared.…”

Section: Resultsmentioning

confidence: 99%

“…In turn, in the tests to determine the chelating ability of the ferrous ion, superoxide radical scavenging activity and hydroxyl radical scavenging activity were observed, of which the results were expressed as IC 50 , the values were equal to 335.01, 459.31, and 92.89 µg/mL, respectively. Previously, the antioxidant activity of J. regia pollen was assessed using the DPPH method only [14,15]. Unfortunately, the obtained values are expressed in other units than in this paper and therefore, they cannot be compared.…”

Section: Antioxidant Activitymentioning

confidence: 94%

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Phytochemical Screening and Bioactive Properties of Juglans regia L. Pollen

et al. 2022

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Pollen is one of the major by-products of the walnut tree, yet it is poorly investigated. Thus, the aim of this study was to investigate the total phenolics, flavonoids, antioxidant, anticancer potential, and polyphenol profile of pollen obtained from male Juglans regia flowers. A total of 24 phenolic compounds were identified in Juglans regia pollen and all of them were reported for the first time for this raw material. The content of polyphenols was 408.03 mg/100 g dry weight (dw) and the most abundant components were quercetin 3-O-sophoroside and 4′,5,7-trihydroxy-3,6-dimethoxyflavone-7-O-beta-D-glucoside. The concentration of these compounds, as well as the total content of polyphenols and flavonoids, strongly determined the antioxidant and cytotoxic activity of Juglans regia pollen. Antioxidant action using the ABTS and CUPRAC methods had the values of 3.35 and 0.32 mmol TE/g dw, respectively. In turn, in the tests of chelating ability of ferrous ion, O2•− and OH− radical scavenging activity, of which the results were expressed as IC50, the values were equal to 335.01, 459.31, and 92.89 µg/mL, respectively. Among the six cancer cell lines, the strongest effect was demonstrated for Caco-2 (140.65 µg/mL) and MCF-7 (140.98 µg/mL) cells. The results provide valuable and previously unpublished data on the polyphenol composition and biological potential of Juglans regia pollen.

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Section: Identification and Quantification Of Phenolic Compoundsmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Antioxidant Activitymentioning

confidence: 94%

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Phytochemical Screening and Bioactive Properties of Juglans regia L. Pollen

et al. 2022

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“…Tropical walnut use has been also linked to skin irritation and discoloration in many cases reported in the past, clearly indicating the fact that taking an excess diet of walnut fruit is also harmful to human health [ 113 ]. This fact was also well supported by developing enormous blisters and skin discoloration in a 65-year-old woman after she consumed 15 kg of walnuts in three days [ 114 ]. It was also revealed that walnut aqueous extract decreased the cyclophosphamide toxicity and protected metabolizing and antioxidant enzymes at the time of treatment on the woman.…”

Section: Toxicity Activity On Plants and Animalsmentioning

confidence: 92%

Juglans regia Linn.: A Natural Repository of Vital Phytochemical and Pharmacological Compounds

Bhat

Shakeel

Rafiq

et al. 2023

Life

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Juglans regia Linn. is a valuable medicinal plant that possesses the therapeutic potential to treat a wide range of diseases in humans. It has been known to have significant nutritional and curative properties since ancient times, and almost all parts of this plant have been utilized to cure numerous fungal and bacterial disorders. The separation and identification of the active ingredients in J. regia as well as the testing of those active compounds for pharmacological properties are currently of great interest. Recently, the naphthoquinones extracted from walnut have been observed to inhibit the enzymes essential for viral protein synthesis in the SARS-CoV-2. Anticancer characteristics have been observed in the synthetic triazole analogue derivatives of juglone, and the unique modifications in the parent derivative of juglone have paved the way for further synthetic research in this area. Though there are some research articles available on the pharmacological importance of J. regia, a comprehensive review article to summarize these findings is still required. The current review, therefore, abridges the most recent scientific findings about antimicrobial, antioxidant, anti-fungal, and anticancer properties of various discovered and separated chemical compounds from different solvents and different parts of J. regia.

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Morphological to Molecular Markers: Plant Genetic Diversity Studies in Walnut (Juglans regia L.)—A Review

et al. 2023

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Persian walnut populations have tremendous morphological and allelic diversity in their germplasm due to heavy outcrossing and years of seed multiplication. These variations are assessed by morphological, cytological, biochemical and molecular markers. Various researchers have used different tree, foliage, flower, nut, and kernel traits to evaluate morphological/phenotypic diversity. In walnut, morphological indices are considered the first to describe and classify the germplasm, but the environment influences them. In comparison, DNA-based markers can detect genetic diversity at any stage of plant development and have been shown to be a potential tool for assessing variation at the DNA level and deciphering genetic relationships within and between species. Microsatellites are very powerful and informative among DNA-based markers in studying genetic relationships and genetic identity at different levels. They are neutral, highly frequent, uniformly distributed, hypervariable, codominant, highly reproducible, produce many alleles per locus, and require a small amount of DNA for analysis. Current breeding objectives can be achieved by selecting superior genotypes from the germplasm, supplemented by molecular characterization in the selection of parents for each breeding program. Therefore, the use of morphological and molecular markers is recommended for efficient exploration and utilization of germplasm resources and to improve diversity among genetic resources. The published literature on morphological and molecular markers, especially SSRs, is presented in this review to provide current insights into the level of genetic diversity in walnut.

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Identification and quantification of biochemical composition and antioxidant activity of walnut pollens

Cited by 7 publications

References 0 publications

Phytochemical Screening and Bioactive Properties of Juglans regia L. Pollen

Phytochemical Screening and Bioactive Properties of Juglans regia L. Pollen

Juglans regia Linn.: A Natural Repository of Vital Phytochemical and Pharmacological Compounds

Morphological to Molecular Markers: Plant Genetic Diversity Studies in Walnut (Juglans regia L.)—A Review

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