Unveiling elderflowers (Sambucus nigra L.) volatile terpenic and norisoprenoids profile: Effects of different postharvest conditions

Salvador, Ângelo C.; Silvestre, Armando J. D.; Rocha, Sı́lvia M.

doi:10.1016/j.foodchem.2017.02.037

Cited by 17 publications

(33 citation statements)

References 39 publications

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“…However, after water addition, the aqueous layer contained large amounts of polyphenols (0.987 mg/mL). In fact, elder trees contain elevated amounts of polyphenolic compounds [ 17 , 18 , 19 , 20 ]. Thus, polyamide resin should be used for their removal because strong hydrogen bonding occurs between polyphenolics and polyamide, but peptides are not retained on this column support [ 21 ].…”

Section: Resultsmentioning

confidence: 99%

Identification of Peptides in Flowers of Sambucus nigra with Antimicrobial Activity against Aquaculture Pathogens

et al. 2018

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The elder (Sambucus spp.) tree has a number of uses in traditional medicine. Previous studies have demonstrated the antimicrobial properties of elderberry liquid extract against human pathogenic bacteria and also influenza viruses. These properties have been mainly attributed to phenolic compounds. However, other plant defense molecules, such as antimicrobial peptides (AMPs), may be present. Here, we studied peptide extracts from flowers of Sambucus nigra L. The mass spectrometry analyses determined peptides of 3 to 3.6 kDa, among them, cysteine-rich peptides were identified with antimicrobial activity against various Gram-negative bacteria, including recurrent pathogens of Chilean aquaculture. In addition, membrane blebbing on the bacterial surface after exposure to the cyclotide was visualized by SEM microscopy and SYTOX Green permeabilization assay showed the ability to disrupt the bacterial membrane. We postulate that these peptides exert their action by destroying the bacterial membrane.

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Section: Resultsmentioning

confidence: 99%

Identification of Peptides in Flowers of Sambucus nigra with Antimicrobial Activity against Aquaculture Pathogens

et al. 2018

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“…Additionally, to date, no data of (unfrozen) Calibrachoa floral scents have been published, so a comparison of results is not possible. However, studies suggest that freezing is one of the most suitable preservation methods, and the observed decrease in volatile compounds in comparison with freshly analyzed material is still within an acceptable level (Salvador et al 2017).…”

Section: Methodological Approachesmentioning

confidence: 99%

“…Due to organizational reasons, however, we were obliged to freeze the flower samples prior to the floral scent analyses. Whether and how this might have affected the aroma profiles of our samples is currently a matter of speculation, as data regarding the effects of the freezing process on floral scent are still inconclusive (see Salvador et al 2017;Culleré et al 2013;but Xiao et al 2015). Additionally, to date, no data of (unfrozen) Calibrachoa floral scents have been published, so a comparison of results is not possible.…”

Section: Methodological Approachesmentioning

confidence: 99%

Comparison of floral traits in Calibrachoa cultivars and assessment of their impacts on attractiveness to flower-visiting insects

Marquardt

Kienbaum²,

Losert³

et al. 2021

Arthropod-Plant Interactions

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Ornamental plants are appreciated by humans for their colorfulness, beauty, abundant flowering and long blooming periods. Many ornamental plants can also constitute an additional foraging resource for flower-visiting insects. However, the ability of the popular ornamental plant Calibrachoa to support urban insect communities is not well documented. In this study, 20 different Calibrachoa cultivars were selected and tested in regard to their insect friendliness based on standardized observations (I) in flight tents using the large earth bumble bee Bombus terrestris as a model species and (II) in open field trials. To investigate what floral characteristics might constitute attractiveness to bumble bees, various floral traits were recorded and compared across all tested Calibrachoa cultivars. Over a two-year period, a total of 6,327 foraging bumble bees were recorded in the tent observations. In the open field observations, we counted 4,188 flower-visiting insects. Our results revealed that (I) all Calibrachoa cultivars were visited by insects for foraging, (II) the number of insect visitors varied significantly among the 20 tested cultivars and (III) the cultivars displayed different floral traits. For the morphometric floral traits and the aroma profiles of Calibrachoa, only the mean nectar quantity and a few identified compounds could be correlated with attractiveness to the model species B. terrestris. We also found that the petal color of the tested cultivars had a significant impact on the number of visitors. Therefore, B. terrestris clearly preferred red or blue Calibrachoa cultivars over those with other petal colors. However, as the cultivar preferences in the different insect groups differed, it is highly recommended to use various cultivars in urban plantings. Nevertheless, efforts must be made to explain what additional floral traits make Calibrachoa and other ornamental plants generally attractive to flower visitors. This information can then be used for breeding purposes to increase the insect friendliness of ornamental plants.

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“…To increase chances of pollen transmission to receptive flowers, floral ontogenical changes in chemistry can also be mechanistic in directing pollinators to unpollinated flowers (Schiestl and Ayasse 2001). Of the comprehensive list of volatile organic compounds (VOCs) previously recorded from flowers of S. nigra (Kaack et al 2006;Salvador et al 2017), few report VOCs emitted from intact inflorescences (Knudsen et al 2006;Peñuelas et al 2014). Here we monitored seven key volatile compounds from inflorescences in situ over 24 h. Linalool was the most abundant of the VOCs, peaking when flowers in inflorescence were open (pre-anthesis), while almost absent when at bud and senescence stages; corresponding with the abundance of thrips in inflorescences.…”

Section: Discussionmentioning

confidence: 99%

Mechanisms in mutualisms: a chemically mediated thrips pollination strategy in common elder

Scott-Brown

Arnold

Kite

et al. 2019

Planta

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Unveiling elderflowers (Sambucus nigra L.) volatile terpenic and norisoprenoids profile: Effects of different postharvest conditions

Cited by 17 publications

References 39 publications

Identification of Peptides in Flowers of Sambucus nigra with Antimicrobial Activity against Aquaculture Pathogens

Identification of Peptides in Flowers of Sambucus nigra with Antimicrobial Activity against Aquaculture Pathogens

Comparison of floral traits in Calibrachoa cultivars and assessment of their impacts on attractiveness to flower-visiting insects

Mechanisms in mutualisms: a chemically mediated thrips pollination strategy in common elder

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