Volatiloma analyses of four South African <i>Helichrysum</i> spp. grown in Italy

Najar, Basma; Nardi, Valeria; Cervelli, C.; Pistelli, Luisa

doi:10.1080/14786419.2020.1791114

Cited by 4 publications

(5 citation statements)

References 25 publications

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“…Fresh and dried flowers were analyzed for their volatile compounds using the Head Space Solide Phase Microextraction (HS-SPME) following the method previously reported by Najar [42]. Briefly, 1 g of each sample was placed in a 25-mL Erlenmeyer flask for 30 min at room temperature (equilibration time).…”

Section: Volatilomesmentioning

confidence: 99%

“…By the ending time, the fiber (100 µm polydimethylsiloxanes (PDMS, Supelco Ltd., Bellefonte, PA, USA) was exposed in the headspace phase of the samples for 5 min and then transferred to the injector of an Agilent 7890B Gas Chromatograph (Agilent Technologies Inc., Santa Clara, CA, USA) equipped with an Agilent HP-5MS (Agilent Technologies Inc., Santa Clara, CA, USA) capillary column (30 m × 0.25 mm; coating thickness 0.25 µm) and an Agilent 5977B single quadrupole mass detector (Agilent Technologies Inc., Santa Clara, CA, USA). The analytical conditions of the used GC-MS were already reported [42].…”

Section: Volatilomesmentioning

confidence: 99%

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The Effects of Post-Harvest Treatments on the Quality of Agastache aurantiaca Edible Flowers

Marchioni

Dimita²,

Gioè

et al. 2021

Horticulturae

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Agastache spp. are used as ornamental plants for their pleasant aroma and the different colors of flowers. Nowadays, their edible flowers have become attractive for their nutraceutical properties. Post-harvest treatment appears as a crucial point to avoid impairment of the nutraceutical compounds and aroma, so different treatments were tested to analyze their effect on the bioactive metabolites and volatilome. Results indicated that freeze-drying was the best solution to prolong the shelf life of these flowers. The use of high temperatures (50, 60, 70 °C) led to altered the composition of antioxidant compounds (phenolic compounds, flavonoids, anthocyanins, carotenoids). Air-drying at 30 °C was a reasonable method, even though time consuming. Concerning the aroma profile, all samples were dominated by oxygenated monoterpene compounds. Pulegone was the main or one of the major constituents of all samples together with p-menthone. Gas Chromatography-Mass Spectrometry results showed a correlation between the temperature and the number of identified compounds. Both fresh and freeze-dried samples evidenced a lesser number (10 and 19, respectively); when the temperature raised, the number of identified constituents increased. Statistical analyses highlighted significant differences between almost all aromatic compounds, even if both Principal Component and Hierarchical Cluster analyses differed at 60 and 70 °C and from the other treatments.

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Section: Volatilomesmentioning

confidence: 99%

Section: Volatilomesmentioning

confidence: 99%

The Effects of Post-Harvest Treatments on the Quality of Agastache aurantiaca Edible Flowers

Marchioni

Dimita²,

Gioè

et al. 2021

Horticulturae

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“…Noteworthy is the appreciable percentage of oxygenated diterpenes in the H. lepidissimum EO (5.6%) with geranyl linalool as unique identified compound. This class of constituent was also found in other Helichrysum species EOs, even though in higher percentages [ 7 , 25 ].…”

Section: Resultsmentioning

confidence: 56%

Volatolomics of Three South African Helichrysum Species Grown in Pot under Protected Environment

et al. 2021

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Helichrysum decorum DC, Helichrysum lepidissimum S. Moore, and Helichrysum umbraculigerum are three species traditionally used in the South African medicine. The present work deals with the investigation of the spontaneous emission and the essential oils obtained from these plants cultivated in open field under uniform conditions. Fractions of the volatile organic compounds of the three species were rich in monoterpene hydrocarbons, representing more than 70% of the total composition. Pinene isomers were the most representative compounds: β-pinene in H. decorum (53.0%), and α-pinene in H. lepidissimum (67.9%) and H. umbraculigerum (54.8%). These latter two species evidenced an important amount of sesquiterpene hydrocarbons (SH) especially represented by γ-curcumene (H. lepidissimum) and α- and β-selinene (H. umbraculigerum). On the contrary, in the EOs, sesquiterpenes compounds prevailed, representing more than 64% of the identified fraction to reach more than 82 and 87% in H. umbraculigerum and H. lepidissimum, respectively. Although the chemical classes and their relative abundances were comparable among the three species, the individual compounds of EOs showed large differences. In fact, caryophyllene oxide (26.7%) and γ-curcumene (17.4%) were the main constituents in H. decorum, and H. lepidissimum respectively, while neo-intermedeol (11.2%) and viridiflorol (10.6%) characterized H. umbraculigerum.

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“…Two hundred milligrams (mg) of the fresh flowers and 20 mg of the HA and FD flowers were used for the extraction of total polyphenols, flavonoids and anthocyanins, as well as for the radical scavenging activity assays. The flowers were homogenized with methanol 70% in an ice bath and centrifuged for 10 min at 14,000 rpm [30]; the supernatant was recovered and used for the analysis.…”

Section: Biochemical Analysesmentioning

confidence: 99%

Effect of Drying Post-Harvest on the Nutritional Compounds of Edible Flowers

Machado,

Pieracci,

Carmassi

et al. 2023

Horticulturae

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The post-harvest techniques are the most critical point to ensure the quality of edible flowers (EFs) and to keep the bioactive metabolites available for human nutrition. The different species of EFs also represent a problem in improving their consumption with safety. The present study focused on the description of the effects of the commonly used drying treatments in the phytonutritional composition of four species of EFs, Callianthe megapotamica, Callianthe striata, Nemesia strumosa and Salvia elegans. The bioactive metabolites and antioxidant activity were determined after freeze-drying (FD) and hot-air-drying (HA) treatments in comparison to fresh flowers. All EFs showed different mineral/trace compositions with potassium as the main element and 70–86% water loss. Both post-harvest treatments increased all the metabolites and antioxidant activity in each species. C. striata with FD treatment had the highest content of primary and secondary metabolites. N. strumosa has the highest ascorbic acid content with the HA treatment. All species had significant antioxidant activity, increasing with FD for C. striata while HA is more recommended for the other species. The post-harvest techniques are able to preserve and increase the bioactive metabolites and must be chosen according to each EF species.

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Volatiloma analyses of four South African Helichrysum spp. grown in Italy

Cited by 4 publications

References 25 publications

The Effects of Post-Harvest Treatments on the Quality of Agastache aurantiaca Edible Flowers

The Effects of Post-Harvest Treatments on the Quality of Agastache aurantiaca Edible Flowers

Volatolomics of Three South African Helichrysum Species Grown in Pot under Protected Environment

Effect of Drying Post-Harvest on the Nutritional Compounds of Edible Flowers

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