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Article

Exploratory Study of Fatty Acid Profile in Two Filmy Ferns with Contrasting Desiccation Tolerance Reveal the Production of Very Long Chain Polyunsaturated Omega-3 Fatty Acids

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Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Sede Temuco 4810101, Chile
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Laboratorio de Producción Animal, Facultad de Ciencias Agropecuarias y Forestales, Center of Biotechnology on Reproduction, Scientific and Technological Bioresource Nucleus Universidad de La Frontera, Casilla 54D, Temuco 4811230, Chile
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Instituto de Producción Animal, Facultad de Ciencias Agrarias y Alimentarias, Universidad Austral de Chile, P.O. Box 567, Valdivia 5110556, Chile
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Laboratorio de Fisiología y Biología Molecular Vegetal, Facultad de Cs. Agronómicas y Forestales, Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Casilla 54D, 1145 Temuco 4811230, Chile
*
Author to whom correspondence should be addressed.
Plants 2020, 9(11), 1431; https://doi.org/10.3390/plants9111431
Received: 31 August 2020 / Revised: 17 October 2020 / Accepted: 21 October 2020 / Published: 24 October 2020
(This article belongs to the Special Issue Water Stress and Desiccation Tolerance in Plants)
Lipids are fundamental components of cell membranes and play a significant role in their integrity and fluidity. Alteration in lipid composition of membranes has been reported to be a major response to abiotic environmental stresses. This work was focused on the characterization of frond lipid composition and membrane integrity during a desiccation–rehydration cycle of two filmy fern species with contrasting desiccation tolerance: Hymenophyllum caudiculatum (less tolerant) and Hymenophyllum plicatum (more tolerant). The relative water content decreased without differences between species when both filmy ferns were subjected to desiccation. However, H. plicatum reached a higher relative water content than H. caudiculatum after rehydration. Fatty acids profiles showed the presence of a very long chain polyunsaturated fatty acid during the desiccation–rehydration cycle, with eicosatrienoic acid being the most abundant. Additionally, propidium iodide permeation staining and confocal microscopy demonstrated that, following the desiccation–rehydration cycle, H. plicatum exhibited a greater membrane integrity than H. caudiculatum. The lack of some very long chain fatty acids such as C22:1n9 and C24:1n9 in this species contrasting with H. plicatum may be associated with its lower membrane stability during the desiccation–rehydration cycle. This report provides the first insight into the fatty acid composition and dynamics of the membrane integrity of filmy ferns during a desiccation–rehydration cycle. This could potentially play a role in determining the different levels of desiccation tolerance and microhabitat preferences exhibited by Hymenophyllaceae species. View Full-Text
Keywords: Hymenophyllum plicatum; Hymenophyllum caudiculatum; desiccation tolerant plant; filmy fern; lipid content; fatty acid profile; membrane integrity; very long chain polyunsaturated omega-3 fatty acids Hymenophyllum plicatum; Hymenophyllum caudiculatum; desiccation tolerant plant; filmy fern; lipid content; fatty acid profile; membrane integrity; very long chain polyunsaturated omega-3 fatty acids
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MDPI and ACS Style

Rabert, C.; Inostroza, K.; Bravo, S.; Sepúlveda, N.; Bravo, L.A. Exploratory Study of Fatty Acid Profile in Two Filmy Ferns with Contrasting Desiccation Tolerance Reveal the Production of Very Long Chain Polyunsaturated Omega-3 Fatty Acids. Plants 2020, 9, 1431. https://doi.org/10.3390/plants9111431

AMA Style

Rabert C, Inostroza K, Bravo S, Sepúlveda N, Bravo LA. Exploratory Study of Fatty Acid Profile in Two Filmy Ferns with Contrasting Desiccation Tolerance Reveal the Production of Very Long Chain Polyunsaturated Omega-3 Fatty Acids. Plants. 2020; 9(11):1431. https://doi.org/10.3390/plants9111431

Chicago/Turabian Style

Rabert, Claudia, Karla Inostroza, Silvana Bravo, Néstor Sepúlveda, and León A. Bravo 2020. "Exploratory Study of Fatty Acid Profile in Two Filmy Ferns with Contrasting Desiccation Tolerance Reveal the Production of Very Long Chain Polyunsaturated Omega-3 Fatty Acids" Plants 9, no. 11: 1431. https://doi.org/10.3390/plants9111431

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