Ocean warming and increased salinity threaten Bostrychia (Rhodophyta) species from genetically divergent populations

Borburema, Henrique D. S.; Yokoya, Nair S.; Souza, Jônatas M. C.; Nauer, Fábio; Barbosa-Silva, Marcelle Stephanne; Marinho‐Soriano, Eliane

doi:10.1016/j.marenvres.2022.105662

Cited by 8 publications

(3 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reactive oxygen species induce damage to macromolecular structures of the cell, including DNA, proteins, and phospholipids, which can lead to cell apoptosis (Lesser, 2006). As a response to oxidative stress macroalgae produce several antioxidant compounds (Araujo et al, 2020;Borburema et al, 2022b). Thus, the higher photosynthetic activity recorded in B. montagnei (rETR and a as proxies) may be related to the energy expenditure for the biosynthesis of antioxidant defensive compounds.…”

Section: Discussionmentioning

confidence: 99%

“…Pellets were resuspended in 1 mL of 90% acetone to extract Chl a for 1 h at 4 °C and protected from light (Borburema et al, 2022b). Afterward, the samples were centrifuged at 12,000×g for 15 min at 4 °C.…”

Section: Pigment Contentmentioning

confidence: 99%

“…Fluorescence techniques have been extensively used to estimate the photosynthetic performance of marine phototrophic organisms during the last 20 years (Figueroa et al, 2019). However, the photosynthetic performance of Bostrychia species was only recently estimated using fluorescence techniques after species had been subjected to salt stress (Gambichler et al, 2021b), desiccation stress (Sańchez de Pedro et al, 2022), ocean acidification (Borburema et al, 2022a), and to temperature and salinity stress (Borburema et al, 2022b). Photosynthetic performance of Bostrychia species based on chlorophyll a fluorescence after specimens have been subjected to light stress has not yet been explored.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Photosynthetic performance, growth, pigment content, and photoprotective compounds of the mangrove macroalgae Bostrychia calliptera and Bostrychia montagnei (Rhodophyta) under light stress

Borburema

Graiff²,

Marinho‐Soriano³

et al. 2022

Front. Mar. Sci.

Self Cite

View full text Add to dashboard Cite

Increased solar radiation on the Earth’s surface is expected due to global change. Mangrove macroalgae can be negatively affected by increased solar radiation, since some species, such as Bostrychia spp. have been characterized as typical “shade” plants. Thus, we investigated the effects of increasing photon flux densities (PFDs: 170, 267, 443, 638, and 1155 µmol photons m–2 s–1) on the physiological performance of Bostrychia calliptera and Bostrychia montagnei from a tropical mangrove. Several photosynthesis–related parameters indicated that both species decreased their photosynthetic performance under increasing PFDs, with photosynthesis of B. montagnei being more affected than that of B. calliptera. Bostrychia calliptera exhibited highest growth under 638 µmol photons m–2 s–1 while at 1155 µmol photons m–2 s–1 it was inhibited. The highest growth of Bostrychia montagnei was observed under 267 µmol photons m–2 s–1. Higher PFDs led to growth inhibition. The phycobiliprotein and chlorophyll a content of B. montagnei was degraded under increased PFDs. In B. calliptera only chlorophyll a degradation was observed. The mycosporine-like amino acid contents (photoprotective metabolites) of both species were degraded under increasing PFDs, which was more pronounced in B. montagnei. Our results demonstrated that increased solar radiation on estuarine tropical ecosystems will be detrimental to the physiological performance of B. calliptera and B. montagnei. Our results also demonstrated that B. montagnei was more negatively affected by increased light stress than B. calliptera. This can explain its preferential occurrence in more shaded microhabitats compared to B. calliptera. Our data document for the first time light acclimation in the studied macroalgae and the deleterious effects of increased light stress on the genus Bostrychia.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Pigment Contentmentioning

confidence: 99%