Changes in quality, antioxidant compounds and DPPH radical-scavenging activity of<i>Rosa hybrida</i>flowers during development

Hou, Wencheng; Yz, Pan; Zhang, Y

doi:10.1080/01140671.2013.844718

Cited by 12 publications

(12 citation statements)

References 22 publications

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“…Aqueous extracts from more developed flowers contained lower concentrations of polyphenols. This is congruent with findings of Hou et al [2014], who also investigated changes in the DPPH radicalscavenging activity of different-colored cultivars of Rosa hybrida flowers at different stages of flowering. noted that the amount of phenols determined in Rosa rugosa petals and antiradical activity of extracts are to a large extent affected by the conditions of extraction and the extractant used.…”

Section: Introductionsupporting

confidence: 90%

CHANGES IN QUALITY INDICATORS OF MINIMALLY PROCESSED WRINKLED ROSE (Rosa rugosa Thunb.) PETALS DURING STORAGE

Zawiślak¹,

Michalczyk²

2018

Acta Sci.Pol.Hortorum Cultus

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Rosa rugosa petals, which have long been used in traditional medicine due to their attractive flavor and presence of bioactive components, are also commonly applied to produce minimally processed and nonthermally treated products with the addition of sucrose. Therefore, to ensure safety and high value of such products during storage, it is crucial to investigate changes in quality indicators. The examined material was non-thermally treated and homogenized petals of wrinkled rose with sucrose concentrations of 50%, 60%, and 70%. Products were stored at 6°C and 21°C for 54 weeks in darkness. Throughout the storage, they were analyzed for microbiological contamination and changes in vitamin C content, color and pH stability. Over the storage period, in samples containing 60 and 70% sucrose, a gradual reduction was observed in the total bacteria count and the yeast and mold count. After the storage period, the value of pH decreased very slightly, while very distinct changes were observed in color parameters at 21°C. Vitamin C content decreased sharply during the first 18 days of storage at both temperatures.

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Section: Introductionsupporting

confidence: 90%

CHANGES IN QUALITY INDICATORS OF MINIMALLY PROCESSED WRINKLED ROSE (Rosa rugosa Thunb.) PETALS DURING STORAGE

Zawiślak¹,

Michalczyk²

2018

Acta Sci.Pol.Hortorum Cultus

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“…; Hou et al . ). It has been hypothesised that each metabolite has a specific functional facet in the context of a blooming flower, resulting in dynamic concentrations throughout the floral lifespan (Kessler & Baldwin ).…”

Section: Introductionmentioning

confidence: 99%

“…A few of these long‐lived flowers were also studied for their free radical scavenging capacities and bioactivity potentials throughout the floral lifespan (Hou et al . ). In contrast, the temporal emission profile of volatile compounds, along with the non‐volatile specialised metabolite content, has been little studied in short‐lived or ephemeral flowers, where post‐anthesis floral lifespans last less than 24 h (Coulter et al .…”

Section: Introductionmentioning

confidence: 99%

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Dynamic trajectories of volatile and non‐volatile specialised metabolites in ‘overnight’ fragrant flowers of Murraya paniculata

et al. 2019

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Ephemeral flowers, especially nocturnal ones, usually emit characteristic scent profiles within their post‐anthesis lifespans of a few hours. Whether these flowers exhibit temporal variability in the composition and profile of volatile and non‐volatile specialised metabolites has received little attention. Flowers of Murraya paniculata bloom in the evenings during the summer and monsoon, and their sweet, intense fragrance enhances the plant's value as an ornamental. We aimed to investigate profiles of both volatile and non‐volatile endogenous specialised metabolites (ESM) in nocturnal ephemeral flowers of M. paniculata to examine whether any biochemically diverse groups of ESM follow distinct patterns of accumulation while maintaining synchrony with defensive physiological functions. Targeted ESM contents of M. paniculata flowers were profiled at ten time points at 2‐h intervals, starting from late bud stage (afternoon) up to the start of petal senescence (mid‐morning). Emitted volatiles were monitored continuously within the whole 20‐h period using headspace sampling. The ESM contents were mapped by time point to obtain a highly dynamic and biochemically diverse profile. Relative temporal patterns of ESM accumulation indicated that the active fragrance‐emitting period might be divided into ‘early bloom’, ‘mid‐bloom’ and ‘late bloom’ phases. Early and late bloom phases were characterised by high free radical generation, with immediate enhancement of antioxidant enzymes and phenolic compounds. The mid‐bloom phase was relatively stable and dedicated to maximum fragrance emission, with provision for strong terpenoid‐mediated defence against herbivores. The late bloom phase merged into senescence with the start of daylight; however, even the senescent petals continued to emit fragrance to attract diurnal pollinators. Our study suggests that dynamic relations between the different ESM groups regulate the short‐term requirements of floral advertisement and phytochemical defence in this ephemeral flower. This study also provided fundamental information on the temporal occurrence of emitted volatiles and internal pools of specialised metabolites in M. paniculata flowers, which could serve as an important model for pollination biology of Rutaceae, which includes many important fruit crops.

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“…For example, in ornamental species such as Tropaeolum majus , Tagetes erecta , and Spilanthes oleracea the phenolic content is closely related to the overall antioxidant activity found in the various species ( Navarro-González et al, 2015 ). This biological activity is also due to the content of vitamins A, C, and E in the flower tissues ( Mlcek and Rop, 2011 ), such as in rose ( Rosa hybrida ) petal extracts ( Hou et al, 2014 ). These flower vitamins could limit or prevent nutritional deficiencies due to a prolonged standardized diet ( Rop et al, 2012 ).…”

Section: Flower Chemicals Responsible For the Nutraceutical Activitymentioning

confidence: 99%

The Biodiversity of Edible Flowers: Discovering New Tastes and New Health Benefits

Benvenuti

Mazzoncini

2021

Front. Plant Sci.

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Floriculture and horticulture have always been two parallel and very distinct agronomic realities. Floriculture is concerned with meeting the ornamental needs of our urban ecosystems, while horticulture is based on meeting food requirements. These two activities have now converged toward a food chain where flowers are conceived of as a sort of “new vegetable” and one of the most promising novelties to satisfy the growing need for food innovation both in terms of an organoleptic and nutraceutical profile. This novelty has rapidly evolved, especially following the growing scientific evidence of the human health benefits of flowers used as food. The typically high pigment concentration of the corollas (especially flavonoids and carotenoids), which have evolved to chromatically attract pollinators, indicates a marked nutraceutical activity especially in terms of antioxidant power. In this review, we first attempted to explore which species are most promising and which should be avoided due to real or suspected toxicity problems. The nutraceutical virtues were therefore highlighted trying to focus attention on those “functional phytochemicals” capable of counteracting some specific human pathologies. Furthermore, the organoleptic profile of edible flowers was investigated since this is one of the least known aspects. The cropping systems suitable for their cultivation were therefore hypothesized and finally the criticalities of edible flowers were addressed in terms of shelf life and marketing opportunities.

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Changes in quality, antioxidant compounds and DPPH radical-scavenging activity ofRosa hybridaflowers during development

Cited by 12 publications

References 22 publications

CHANGES IN QUALITY INDICATORS OF MINIMALLY PROCESSED WRINKLED ROSE (Rosa rugosa Thunb.) PETALS DURING STORAGE

CHANGES IN QUALITY INDICATORS OF MINIMALLY PROCESSED WRINKLED ROSE (Rosa rugosa Thunb.) PETALS DURING STORAGE

Dynamic trajectories of volatile and non‐volatile specialised metabolites in ‘overnight’ fragrant flowers of Murraya paniculata

The Biodiversity of Edible Flowers: Discovering New Tastes and New Health Benefits

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