scholarly journals An Explanation Based on Energy-Related Changes for Blue Mussel Mytilus edulis Coping With Seawater Acidification

2021 ◽  
Vol 12 ◽  
Author(s):  
Ying Guo ◽  
Bin Zhou ◽  
Tianli Sun ◽  
Yaya Zhang ◽  
Yongshun Jiang ◽  
...  
Keyword(s):  
Mytilus Edulis ◽  
Blue Mussel ◽  
Energy Charge ◽  
Atp Synthesis ◽  
Experimental Period ◽  
Ecological Impacts ◽  
Synthesis Rate ◽  
Gene Expressions ◽  
Treatment Groups ◽  
Seawater Acidification

As ocean acidification (OA) is gradually increasing, concerns regarding its ecological impacts on marine organisms are growing. Our previous studies have shown that seawater acidification exerted adverse effects on physiological processes of the blue mussel Mytilus edulis, and the aim of the present study was to obtain energy-related evidence to verify and explain our previous findings. Thus, the same acidification system (pH: 7.7 or 7.1; acidification method: HCl addition or CO2 enrichment; experimental period: 21d) was set up, and the energy-related changes were assessed. The results showed that the energy charge (EC) and the gene expressions of cytochrome C oxidase (COX) reflecting the ATP synthesis rate increased significantly after acidification treatments. What’s more, the mussels exposed to acidification allocated more energy to gills and hemocytes. However, the total adenylate pool (TAP) and the final adenosine triphosphate (ATP) in M. edulis decreased significantly, especially in CO2 treatment group at pH 7.1. It was interesting to note that, TAP, ATP, and COXs gene expressions in CO2 treatment groups were all significantly lower than that in HCl treatment groups at the same pH, verifying that CO2-induced acidification exhibited more deleterious impacts on M. edulis, and ions besides H+ produced by CO2 dissolution were possible causes. In conclusion, energy-related changes in M. edulis responded actively to seawater acidification and varied with different acidification conditions, while the constraints they had at higher acidification levels suggest that M. edulis will have a limited tolerance to increasing OA in the future.

Title: CO2 and HCl-induced seawater acidification impair the ingestion and digestion of blue mussel Mytilus edulis

Chemosphere ◽  
2020 ◽  
Vol 240 ◽  
pp. 124821 ◽  
Author(s):  
Mengxue Xu ◽  
Tianli Sun ◽  
Xuexi Tang ◽  
Keyu Lu ◽  
Yongshun Jiang ◽  
...  
Keyword(s):  
Mytilus Edulis ◽  
Blue Mussel ◽  
Seawater Acidification

Corrigendum to “CO2 and HCl-induced seawater acidification impair the ingestion and digestion of blue mussel Mytilus edulis” [Chemosphere 240 (2020) 124821]

Chemosphere ◽  
2020 ◽  
Vol 245 ◽  
pp. 125996
Author(s):  
Mengxue Xu ◽  
Tianli Sun ◽  
Xuexi Tang ◽  
Keyu Lu ◽  
Yongshun Jiang ◽  
...  
Keyword(s):  
Mytilus Edulis ◽  
Blue Mussel ◽  
Seawater Acidification

scholarly journals Long-term impact of a 4-day feed restriction at the protozoea stage on metabolic gene expressions of whiteleg shrimp (Litopenaeus vannamei)

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e8715
Author(s):  
Luis Paulo A. Lage ◽  
Delphine Weissman ◽  
Mélanie Serusier ◽  
Soraia Marques Putrino ◽  
Frederic Baron ◽  
...  
Keyword(s):  
Atp Synthesis ◽  
Experimental Period ◽  
Whole Body ◽  
Mrna Levels ◽  
Long Term Effects ◽  
Gene Expressions ◽  
Final Body Weight ◽  
Nutritional Programming ◽  
Whiteleg Shrimp

Based on the “nutritional programming” concept, we evaluated the long-term effects of an early four-day caloric restriction (40% reduction in feed allowance compared to a normal feeding level) at the protozoea stage in whiteleg shrimp. We analyzed long-term programming of shrimp by studying metabolism at the molecular level, through RT-qPCR of key biomarkers (involved in intermediary metabolism and digestion). The mRNA levels (extracted from the whole body) were analyzed after the stimulus and after the rearing period, at 20 and 35 days, respectively. At the end of the experimental period, shrimp growth performance was evaluated. There was no difference between normal feed allowance (CTL) and feed-restricted shrimp (RES) for performance parameters (survival, final body weight and the number of post-larvae g−1 or PL g−1). The stimulus directly affected the mRNA levels for only two genes, i.e., preamylase and lvglut 2 which were expressed at higher levels in feed-restricted shrimp. In the long-term, higher levels of mRNAs for enzymes coding for glycolysis and ATP synthesis were also detected. This suggests a possible long-term modification of the metabolism that is linked to the stimulus at the protozoea stage. Overall, further studies are needed to improve nutritional programming in shrimp.

scholarly journals Differential Segregation Patterns of Sperm Mitochondria in Embryos of the Blue Mussel (Mytilus edulis)

Genetics ◽  
2004 ◽  
Vol 166 (2) ◽  
pp. 883-894
Author(s):  
Liqin Cao ◽  
Ellen Kenchington ◽  
Eleftherios Zouros
Keyword(s):  
Mitochondrial Dna ◽  
Mytilus Edulis ◽  
Blue Mussel ◽  
Uniparental Inheritance ◽  
Male Gonad ◽  
Doubly Uniparental Inheritance ◽  
Organelle Genomes ◽  
Somatic Tissues ◽  
Tight Linkage ◽  
Mitotracker Green

Abstract In Mytilus, females carry predominantly maternal mitochondrial DNA (mtDNA) but males carry maternal mtDNA in their somatic tissues and paternal mtDNA in their gonads. This phenomenon, known as doubly uniparental inheritance (DUI) of mtDNA, presents a major departure from the uniparental transmission of organelle genomes. Eggs of Mytilus edulis from females that produce exclusively daughters and from females that produce mostly sons were fertilized with sperm stained with MitoTracker Green FM, allowing observation of sperm mitochondria in the embryo by epifluorescent and confocal microscopy. In embryos from females that produce only daughters, sperm mitochondria are randomly dispersed among blastomeres. In embryos from females that produce mostly sons, sperm mitochondria tend to aggregate and end up in one blastomere in the two- and four-cell stages. We postulate that the aggregate eventually ends up in the first germ cells, thus accounting for the presence of paternal mtDNA in the male gonad. This is the first evidence for different behaviors of sperm mitochondria in developing embryos that may explain the tight linkage between gender and inheritance of paternal mitochondrial DNA in species with DUI.

Are bio-based and biodegradable microplastics impacting for blue mussel (Mytilus edulis)?

2021 ◽  
Vol 167 ◽  
pp. 112295
Author(s):  
Amina Khalid ◽  
Aurore Zalouk-Vergnoux ◽  
Samira Benali ◽  
Rosica Mincheva ◽  
Jean-Marie Raquez ◽  
...  
Keyword(s):  
Mytilus Edulis ◽  
Blue Mussel
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