Phenolic fingerprints of the Pacific seagrass Phyllospadix torreyi - Structural characterization and quantification of undescribed flavonoid sulfates

Grignon‐Dubois, Micheline; Rezzonico, Bernadette; Blanchet, Hugues

doi:10.1016/j.phytochem.2022.113256

Cited by 4 publications

(2 citation statements)

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“…Based on the concentration amounts in the 47 collections, the phenolic compounds of N. noltei leaf tissue rank in the following order, whatever the season and the year: With the exception of zosteric and coumaric acids, the other phenolic acids present in N. noltei and Z. marina are exclusively based on the caffeic acid building block, with the compounds being formed from two or four caffeic acid units. We had previously isolated rosmarinic acid from Z. marina and Phyllospadix torreyi, which also belongs to the Zosteraceae family [40,41,55]. The presence of zosteranoic acid (5) in both aboveand belowground tissues is of particular interest.…”

Section: Discussionmentioning

confidence: 99%

“…It is estimated that 150 sulfated flavonoids of natural occurrence have been identified. A survey of fourty-three species of seagrass showed that five of the twelve genera, including some members of the Zosteraceae family, contained flavonoid sulfates, namely Phyllospadix, Zostera, Enhalus, Thalassia and Halophila [32,33,55]. The flavonoid profile of P. torreyi, composed exclusively of sulfates, appears to be unique among seagrasses [55].…”

Section: Discussionmentioning

confidence: 99%

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Seasonal and Interannual Variability in the Phenolic Content of the Seagrass Nanozostera noltei: Characterization of Suitable Candidates for the Monitoring of Seagrass Health

Grignon-Dubois,

Rezzonico

2023

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Developing early warning indicators to accurately detect ecosystem disturbances is vital for enhancing ecosystem management. The seasonal and interannual variability of the phenolic content of Nanozostera noltei from Arcachon Bay, France, was explored over 47 consecutive months to identify suitable early indicators of the state of seagrass beds. Five phenolic acid derivatives and eight flavonoids were fully characterized using chromatographic and spectroscopic techniques; a caffeic tetramer was described for the first time as a metabolite of N. noltei and of the genus Nanozostera. The individual phenolic concentrations in each of the 47 collections were determined by quantitative HPLC and analyzed as a function of year and season. The variability of the phenolic content in the rhizomes of N. noltei from Arcachon Bay was also determined over one year, as well as rhizomes of N. noltei from three other locations in the Atlantic and Mediterranean for comparison purposes. In addition, the phenolic fingerprints of Z. marina rhizomes were also characterized for the first time. The results show that leaf phenolic chemistry could be used to signify changes in the ecological health of N. noltei. In particular, it appears that diosmetin 7-sulfate, rosmarinic acid and zosteranoic acid could be reliable and easy-to-use indicators for monitoring N. noltei meadows. From a phytochemical point of view, this work is the first report of zosteranoic acid in the leaves and the rhizomes of N. noltei and in the rhizomes of Z. marina.

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Section: Discussionmentioning

confidence: 99%