Silencing of a Pseudo-nitzschia arenysensis lipoxygenase transcript leads to reduced oxylipin production and impaired growth

© 2021 The Authors. New Phytologist © 2021 New Phytologist Foundation.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 233(2022), 2 vom: 16. Jan., Seite 809-822
1. Verfasser: Sabatino, Valeria (VerfasserIn)
Weitere Verfasser: Orefice, Ida, Marotta, Pina, Ambrosino, Luca, Chiusano, Maria Luisa, d'Ippolito, Giuliana, Romano, Giovanna, Fontana, Angelo, Ferrante, Maria Immacolata
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Pseudo-nitzschia arenysensis RNA-interference algal growth biosynthesis diatoms gene function Oxylipins Lipoxygenase EC 1.13.11.12
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520 |a Because of their importance as chemical mediators, the presence of a rich and varied family of lipoxygenase (LOX) products, collectively named oxylipins, has been investigated thoroughly in diatoms, and the involvement of these products in important processes such as bloom regulation has been postulated. Nevertheless, little information is available on the enzymes and pathways operating in these protists. Exploiting transcriptome data, we identified and characterized a LOX gene, PaLOX, in Pseudo-nitzschia arenysensis, a marine diatom known to produce different species of oxylipins by stereo- and regio-selective oxidation of eicosapentaenoic acid (EPA) at C12 and C15. PaLOX RNA interference correlated with a decrease of the lipid-peroxidizing activity and oxylipin synthesis, as well as with a reduction of growth of P. arenysensis. In addition, sequence analysis and structure models of the C-terminal part of the predicted protein closely fitted with the data for established LOXs from other organisms. The presence in the genome of a single LOX gene, whose downregulation impairs both 12- and 15-oxylipins synthesis, together with the in silico 3D protein modelling suggest that PaLOX encodes for a 12/15S-LOX with a dual specificity, and provides additional support to the correlation between cell growth and oxylipin biosynthesis in diatoms 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Pseudo-nitzschia arenysensis 
650 4 |a RNA-interference 
650 4 |a algal growth 
650 4 |a biosynthesis 
650 4 |a diatoms 
650 4 |a gene function 
650 7 |a Oxylipins  |2 NLM 
650 7 |a Lipoxygenase  |2 NLM 
650 7 |a EC 1.13.11.12  |2 NLM 
700 1 |a Orefice, Ida  |e verfasserin  |4 aut 
700 1 |a Marotta, Pina  |e verfasserin  |4 aut 
700 1 |a Ambrosino, Luca  |e verfasserin  |4 aut 
700 1 |a Chiusano, Maria Luisa  |e verfasserin  |4 aut 
700 1 |a d'Ippolito, Giuliana  |e verfasserin  |4 aut 
700 1 |a Romano, Giovanna  |e verfasserin  |4 aut 
700 1 |a Fontana, Angelo  |e verfasserin  |4 aut 
700 1 |a Ferrante, Maria Immacolata  |e verfasserin  |4 aut 
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773 1 8 |g volume:233  |g year:2022  |g number:2  |g day:16  |g month:01  |g pages:809-822 
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