Desiccation Stress Tolerance in Porphyra and Pyropia Species: A Latitudinal Analysis along the Chilean Coast.

Contreras-Porcia, L; Meynard, A; Piña, F; Kumar, M; Lovazzano, C; Núñez, A; Flores-Molina, MR

Desiccation Stress Tolerance in Porphyra and Pyropia Species: A Latitudinal Analysis along the Chilean Coast.

Contreras-Porcia, L Meynard, A Piña, F Kumar, M

Lovazzano, C Núñez, A Flores-Molina, MR

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Publisher:: MDPI
Publication Type:: Journal Article
Citation:: Plants (Basel), 2023, 12, (1), pp. 12
Issue Date:: 2023

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Field	Value	Language
dc.contributor.author	Contreras-Porcia, L
dc.contributor.author	Meynard, A
dc.contributor.author	Piña, F
dc.contributor.author	Kumar, M https://orcid.org/0000-0002-5247-3059
dc.contributor.author	Lovazzano, C
dc.contributor.author	Núñez, A
dc.contributor.author	Flores-Molina, MR
dc.date.accessioned	2024-03-19T02:06:47Z
dc.date.available	2022-12-15
dc.date.available	2024-03-19T02:06:47Z
dc.date.issued	2023
dc.identifier.citation	Plants (Basel), 2023, 12, (1), pp. 12
dc.identifier.issn	2223-7747
dc.identifier.issn	2223-7747
dc.identifier.uri	http://hdl.handle.net/10453/176896
dc.description.abstract	One of the most important factors regulating the distribution and abundance of seaweeds is desiccation, triggered mainly by tidal changes and climatic variation. Porphyra and Pyropia species have evolved multiple strategies to tolerate desiccation stress; however, how these tolerance strategies differ in these species inhabiting different latitudes is still unknown. In this context, we analyzed, in situ, the physiological responses of these species (collected from 18° S to 41° S along the Chilean coast) to desiccation stress using biochemical and molecular analyses. The hyper-arid terrestrial climate of northern Chile, with high evaporation and lack of constant rain determines a very steep increase in desiccation stress in the upper intertidal during low tide for these species. Accordingly, the results showed that, in comparison with the southernmost populations, the Porphyra/Pyropia species from the north zone of Chile (18°-30° S) exhibited higher contents of lipoperoxide and carbonyls (1.6-1.9 fold) together with higher enzymatic activities, including ascorbate peroxidase, catalase, peroxiredoxin, and thioredoxin (2-3-fold). In addition, a substantial expression of cat, prx, and trx transcripts during desiccation was demonstrated, mainly in the northernmost populations. These results provide evidence of (i) significant activation of antioxidant enzymes and transcripts (principally cat and prx); (ii) participation of phenolic antioxidant compounds as a highly plastic physiological strategy to cope with desiccation; and (iii) the activation of the tolerance responses was affected by species latitudinal distribution. Thus, for the first time, this study integrated the biochemical and genetic responses of diverse Porphyra/Pyropia species to better understand their physiological dynamics of tolerance over a wide latitudinal range.
dc.format	Electronic
dc.language	eng
dc.publisher	MDPI
dc.relation.ispartof	Plants (Basel)
dc.relation.isbasedon	10.3390/plants12010012
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	30 Agricultural, veterinary and food sciences
dc.subject.classification	31 Biological sciences
dc.title	Desiccation Stress Tolerance in Porphyra and Pyropia Species: A Latitudinal Analysis along the Chilean Coast.
dc.type	Journal Article
utslib.citation.volume	12
utslib.location.activity	Switzerland
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
utslib.copyright.status	open_access	*
pubs.consider-herdc	false
dc.date.updated	2024-03-19T02:06:45Z
pubs.issue	1
pubs.publication-status	Published online
pubs.volume	12
utslib.citation.issue	1

Abstract:

One of the most important factors regulating the distribution and abundance of seaweeds is desiccation, triggered mainly by tidal changes and climatic variation. Porphyra and Pyropia species have evolved multiple strategies to tolerate desiccation stress; however, how these tolerance strategies differ in these species inhabiting different latitudes is still unknown. In this context, we analyzed, in situ, the physiological responses of these species (collected from 18° S to 41° S along the Chilean coast) to desiccation stress using biochemical and molecular analyses. The hyper-arid terrestrial climate of northern Chile, with high evaporation and lack of constant rain determines a very steep increase in desiccation stress in the upper intertidal during low tide for these species. Accordingly, the results showed that, in comparison with the southernmost populations, the Porphyra/Pyropia species from the north zone of Chile (18°-30° S) exhibited higher contents of lipoperoxide and carbonyls (1.6-1.9 fold) together with higher enzymatic activities, including ascorbate peroxidase, catalase, peroxiredoxin, and thioredoxin (2-3-fold). In addition, a substantial expression of cat, prx, and trx transcripts during desiccation was demonstrated, mainly in the northernmost populations. These results provide evidence of (i) significant activation of antioxidant enzymes and transcripts (principally cat and prx); (ii) participation of phenolic antioxidant compounds as a highly plastic physiological strategy to cope with desiccation; and (iii) the activation of the tolerance responses was affected by species latitudinal distribution. Thus, for the first time, this study integrated the biochemical and genetic responses of diverse Porphyra/Pyropia species to better understand their physiological dynamics of tolerance over a wide latitudinal range.

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http://hdl.handle.net/10453/176896