Edible Flower Species as a Promising Source of Specialized Metabolites

Dujmović, Mia; Radman, Sanja; Opačić, Nevena; Uher, Sanja Fabek; Mikuličin, Vida; Voća, Sandra; Žlabur, Jana Šic

doi:10.3390/plants11192529

Cited by 18 publications

(20 citation statements)

References 85 publications

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“…For the determination of total phenolics in the samples, the colorimetric reaction with Folin–Ciocâlteu reagent was performed according to Dujmović et al. (2022) .…”

Section: Methodsmentioning

confidence: 99%

Boosting nutritional quality of Urtica dioica L. to resist climate change

Opačić,

Radman,

Dujmović

et al. 2024

Front. Plant Sci.

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IntroductionMore than ever, traditional agricultural practices need a shift towards more resilient, sustainable, modern and adaptable practices that benefit the health of the planet and people. Today's consumers are constantly on the lookout for novel, highly nutritious foods that have a positive impact on their overall health and well-being. Nettle (Urtica dioica L.) is gaining recognition not only as a popular medicinal plant, but also as a desirable green leafy vegetable rich in phytonutrients. As it is difficult and even expensive to control the quality standards of wild-collected plants, the implementation of sustainable cultivation methods, especially hydroponics, with effective greenhouse management could be a possible solution to obtain a standardized product with high nutritional value. Therefore, the aim of this study was to investigate the effects of four nutrient solutions differing in the content of macro- and micronutrients (especially nitrogen, potassium, calcium, magnesium and iron) and two consecutive cuts on the number of leaves, yield, nitrate and mineral content and the content of specialized metabolites of stinging nettle from a floating hydroponic system.MethodsNettle plants were cultivated in a hydroponic system using the floating hydroponics technique. The two-factorial experiment was performed with nutrient solution and consecutive cuts as factors.ResultsThe highest yield (2.49 kg/m2) was achieved after the 1st cut with plants cultivated in the nutrient solution with higher nutrient concentration. All tested nutrient solutions resulted in high levels of minerals and bioactive compounds in the plant material (ascorbic acid content of 102.30 mg/100 g fw and total phenolics content of 465.92 mg GAE/100 g fw), confirming floating hydroponics as a sustainable approach for cultivating nettle with enhanced nutritional value and antioxidant potential.ConclusionIt is important to highlight that the nutrient solution with the lowest nutrient composition yielded the highest concentrations of calcium (5.54%) and iron (180.67 mg/kg dw). Furthermore, it exhibited elevated levels of specific phenolic compounds, including caffeoylmaleic acid, ellagic acid, ferulic acid, naringin, and rutin trihydrate. Notably, this solution demonstrated the lowest nitrate content (4225.33 mg/kg fw) in the plant material. Therefore, it can be recommended as a preferable formulation for hydroponic nettle cultivation.

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“…For the determination of total phenolics in the samples, the colorimetric reaction with Folin–Ciocâlteu reagent was performed according to Dujmović et al. (2022) .…”

Section: Methodsmentioning

confidence: 99%

Boosting nutritional quality of Urtica dioica L. to resist climate change

Opačić,

Radman,

Dujmović

et al. 2024

Front. Plant Sci.

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“…The extraction was performed according to the following procedure: samples (10.00±0.01) g were homogenised with 40 mL of 80 % EtOH, heated to boiling point and refluxed for 10 min. After filtration, another 50 mL of 80 % EtOH were added and the process was repeated as described by Dujmović et al ( 18 ). The extracts were used for the determination of total phenolic (TPC), total flavonoid (TFC), total non-flavonoid (TNFC) content and antioxidant capacity.…”

Section: Methodsmentioning

confidence: 99%

“…were placed into a 25-mL volumetric flask and the obtained solutions were blown with nitrogen. Further procedure followed the protocol described by Dujmović et al ( 18 ). TFC was calculated as the difference between the amount of TPC and TNFC and expressed in milligrams of catechol equivalents (CCE) per 100 g fresh mass.…”

Section: Methodsmentioning

confidence: 99%

How to Increase the Nutritional Quality of Stinging Nettle Through Controlled Plant Nutrition

Dujmović,

Opačić,

Radman

et al. 2023

Food Technol. Biotechnol. (Online)

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Research background. As food production faces major challenges, modern agricultural practices are increasingly focused on conserving resources, reducing negative environmental impacts, and sustainably producing foods high in health-promoting phytochemicals. During the production process, many factors can influence the quality and chemical composition of a final food product. Proper selection of cultivating conditions, especially a balanced nutrition, can significantly increase nutritional value resulting in foods with strong biological and functional properties. Stinging nettle is a rich source of minerals, vitamins, pigments, phenols and other bioactive compounds (BC) and can be consumed as a green leafy vegetable with beneficial effects on human health. Therefore, the aim of this study was to determine the nutritional quality and antioxidant capacity of stinging nettle leaves under the influence of different nutrient solution (NS) treatments during three mowings. Experimental approach. The experiment was performed in a floating hydroponic system, with different treatments of NS application during three mowings. After each mowing, the following treatments were differed: treatment 1 – depletion with water, treatment 2 - supplementation with standard NS, and treatment 3 - correction with nutrients. Of the BC minerals, ascorbic acid, phenols, and photosynthetic pigments content, as well as antioxidant capacity were analyzed spectrophotometrically, while individual phenols were determined by liquid chromatography. Results and conclusions. Different nutrition solution treatments and the number of mowings had a significant influence on the content of the analyzed BC. The highest contents of total phenols (377.04 mg GAE/100 g fm), total flavonoids (279.54 mg CTH/100 g fm), ascorbic acid (112.37 mg/100 g fm), and pigments (total chlorophylls 1.84, and total carotenoids 0.36 mg/g), as well as the highest antioxidant capacity (35.47 µmol TE/g) were recorded in the third mowing, with nutrient solution supplementation. Novelty and scientific contribution. This is the first time that stinging nettle leaves are produced in a floating hydroponic system by controlled plant nutrition. We establish this type of nutrition manipulation during multiple mowings as an innovative technique for the production of novel food with high and improved nutritional value suitable for consumption as green leafy vegetables.

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“…Edible flowers are rich in antioxidant compounds such as flavonoids, anthocyanins, phenolic acids, and carotenoids. Due to these bioactive compounds, certain edible flowers can provide functional effects as antioxidant, immunomodulatory, anticancer, IOP Publishing doi:10.1088/1755-1315/1324/1/012107 2 antibacterial, anti-inflammatory, cardioprotective, and so on [5]. The functional properties of the edible flowers may provide protection and improve the immune system.…”

Section: Introductionmentioning

confidence: 99%

The effect of butterfly pea (Clitoria ternatea L.) and roselle (Hibiscus sabdariffa L.) powder addition on the physicochemical and sensory properties of white chocolate ganache

Pamungkaningtyas,

Fandy,

Septiyanto

2024

IOP Conf. Ser.: Earth Environ. Sci.

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Ganache is a mixture of chocolate and cream commonly utilized as fillings or glazing. Butterfly pea and roselle are edible flowers with potential bioactive compounds that could improve ganache functionality. This research aimed to understand the effect of butterfly pea and roselle powder addition with various concentrations (1%, 1.5%, and 2% (w/v)) on white chocolate ganache’s physical and sensory properties. The samples were analyzed for their water content, color profile, water activity, total soluble solids, and hedonic scores. Results showed that the butterfly pea-added ganache had a higher water content and activity than the roselle-added ganache. However, the total soluble solid analysis showed a reverse trend. Addition of 2% edible flower powder decreased the moisture content of ganache up to 2%. Increasing the concentration of butterfly pea powder resulted in higher blueness intensity, while in roselle ganache, there was no significant effect on the redness. The hedonic test showed that the difference in edible flower types and concentration resulted in no significant difference in panelists’ acceptance of all tested sensory attributes.

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Edible Flower Species as a Promising Source of Specialized Metabolites

Cited by 18 publications

References 85 publications

Boosting nutritional quality of Urtica dioica L. to resist climate change

Boosting nutritional quality of Urtica dioica L. to resist climate change

How to Increase the Nutritional Quality of Stinging Nettle Through Controlled Plant Nutrition

The effect of butterfly pea (Clitoria ternatea L.) and roselle (Hibiscus sabdariffa L.) powder addition on the physicochemical and sensory properties of white chocolate ganache

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