PUFAs and PUAs production in three benthic diatoms from the northern Adriatic Sea. (October 2017)

• Record Type: Journal Article
• Authors: Pezzolesi, Laura; Pichierri, Salvatore; Samorì, Chiara; Totti, Cecilia; Pistocchi, Rossella
• Is Part Of: Phytochemistry. Volume 142(2017)
• Page Start: 85
• Page End: 91
• Publication Date: 2017-10
• Subjects: Proschkinia complanatoides -- Tabularia affinis -- Navicula sp. -- Proschkiniaceae -- Ulnariaceae -- Naviculaceae -- Benthic diatoms -- GC-MS -- Fatty acids -- Polyunsaturated aldehydes; Botanical chemistry -- Periodicals; Biochemistry -- Periodicals; Botany -- Periodicals; Chimie végétale -- Périodiques; 572.2
• DOI: 10.1016/j.phytochem.2017.06.018
• Languages: English
• ISSNs: 0031-9422

Abstract

Abstract: The production of polyunsaturated aldehydes (PUAs) has been reported by many planktonic diatoms, where they have been implicated in deleterious effects on copepod reproduction and growth of closeby microbes or suggested as infochemicals in shaping plankton interactions. This study investigates the production of PUAs by diatoms commonly occurring in the microphytobenthic communities in temperate regions: Tabularia affinis, Proschkinia complanatoides and Navicula sp. Results highlight the production of PUAs by the three benthic diatoms during stationary and decline phases, with intracellular concentrations from 1.8 to 154.4 fmol cell −1, which are within the range observed for planktonic species. The existence of a large family of PUAs, including some with four unsaturations, such as decatetraenal, undecatetraenal and tridecatetraenal, was observed. Since particulate and dissolved PUAs were positively correlated, together with cell lysis, equivalent concentrations may be released during late growth stages, which may affect benthic invertebrates grazing on them and other microalgae. Graphical abstract: Highlights: Proschkinia complanatoides, Tabularia affinis and Navicula sp. are PUAs producers. Intracellular PUA concentrations of benthic and planktonic diatoms are comparable. Benthic diatoms produce several PUAs, including some with four unsaturations.