Seasonal changes of nucleotides in mussel (Mytilus galloprovincialis) mantle tissue

Blanco, S.; Suárez, Mercedes; Juan, F. San

doi:10.1016/j.cbpb.2005.12.021

Cited by 12 publications

(15 citation statements)

References 39 publications

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“…We found that ARC concentrations and AEC values in several tissues differed between specimens collected in May and December, respectively. In a previous study, seasonal changes in ARC and AEC were reported in the oyster soft body and the mussel mantle [22,25].…”

Section: Discussionmentioning

confidence: 98%

“…The oysters exposed to air at 4 and 20°C, respectively, were collected in February, and those specimens exposed to air at 15°C were collected in May. Seasonal variations in the chemical constituents have been reported in marine molluscs [23][24][25], and it is possible that the different values of osmotic pressure in May and February may be a result of seasonal variations in the chemical constituents of these molluscs. We observed that as the temperature increased, the LT 50 of our oysters decreased during the period of air exposure (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…In marine shellfish, postmortem changes in the concentrations of ATP-related compounds (ARCs) have been investigated in detail to determine indices of freshness during storage [14][15][16][17][18][19][20][21]. Marine shellfish show seasonal changes in ARCs and free amino acids [22][23][24][25]. During exposure to hypoxic seawater, ATP levels were found to rapidly decrease within several hours in the whole body of Mytilus galloprovincialis [6].…”

Section: Introductionmentioning

confidence: 99%

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Biochemical changes in oyster tissues and hemolymph during long-term air exposure

et al. 2010

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The Pacific oyster Crassostrea gigas is a sessile bivalve that inhabits the intertidal zone and therefore frequently exposed to air during the tidal cycle. It is highly adaptive to hypoxic conditions. We have studied the physiological state of oysters during long-term exposure to air. The oysters became hypoxic when exposed to air or hypoxic seawater. The 50% lethal time of oysters exposed to air at 4, 15 and 20°C was 47.8, 15.9 and 12.2 days, respectively. The hemolymph pH decreased by day 3; however, it showed a slight increase by day 5 at both 4 and 20°C. The adenylate energy charge (AEC) values decreased rapidly on the first day of air exposure in the adductor muscle, mantle, gill and body trunk, and these decreases were accompanied by decreases in ATP concentrations and increases in AMP concentrations. The AEC values in all of the tissues had fallen to below 30% by day 50 of air exposure at 4°C. These data suggest that the energy state of oysters deteriorates rapidly with air exposure. Consequently, AEC values may be useful indices of the physiological state of the oyster during long-term exposure to air.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biochemical changes in oyster tissues and hemolymph during long-term air exposure

et al. 2010

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“…The Spearman correlation (r s ) shown is for all sampling dates pooled. amounts of energy and thus compete with the others (Bayne and Newell 1983;Blanco et al 2006). For example, gamete production can mobilize up to 90% of the energy in sexually mature mussels (Rodhouse et al 1984).…”

Section: Discussionmentioning

confidence: 99%

“…For example, gamete production can mobilize up to 90% of the energy in sexually mature mussels (Rodhouse et al 1984). Energy reserves are accumulated primarily in the digestive gland and in the gonads (Cartier et al 2004;Blanco et al 2006) mostly as glycogen and lipids (Bayne and Newell 1983;Epp et al 1988). More specifically, triacylglycerols (TAG) are the most important class of lipids stored as energy reserves (Freites et al 2002;Pernet et al 2007).…”

Section: Discussionmentioning

confidence: 99%

Biochemical and genetic characteristics of suspension-cultured mussels (Mytilus edulis) in relation to byssal thread production and losses by fall-off

Lachance

Hennebicq

Myrand

et al. 2011

Aquat. Living Resour.

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-Mussel culture relies on the mussel self-attachment capacity through byssus production. By doing so, no cages or containment devices are needed. It has been previously suggested that thread production requires a nonnegligible part of the energy expenditure in blue mussels Mytilus edulis. Therefore our work investigates the relationships between byssal thread production, mussels energetic reserves and phospholipids profiles in the foot. The relationship between thread production and heterozygosity was also examined. The study was realized in a small lagoon of the Îles-de-la-Madeleine, southern Gulf of St. Lawrence, Canada, on four sampling dates between June and September encompassing the pre-to post-spawning periods. Our results show a significant relationship between the thread numbers and attachment strength. However, no correlations were found between energy reserves, phospholipids composition of the foot or heterozygosity level and byssal production. Our results suggest that mussels in suspension culture in this lagoon were not energy-limited so that the energy reserves did not influence the byssal thread production.

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Cyclic AMP signaling in bivalve molluscs: an overview

Fabbri¹,

Capuzzo²

2010

J. Exp. Zool.

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The cyclic AMP (cAMP)-dependent signaling accounts for the control of cellular cascades involved in many physiological functions, and a wealth of information is available on the cAMP system that operates in mammalian cells. Nevertheless, cAMP has a central role also in nonmammalian vertebrates and invertebrates. The present review aims at examining the information available on bivalve molluscs, from the first studies carried out in the early 1980s to the last progresses made in the present days. The major focus is on the structural and operational characteristics of the main actors of the signaling pathway, i.e., adenylyl cyclase, G proteins, and protein kinase A, and on the role played by the cyclic nucleotide on smooth muscle, heart, gills, gonads, and metabolism regulation. Moreover, recent evidence regarding the cAMP system as a target of environmental stress factors are discussed. It will become clear that cAMP does play a wide and important role in bivalve physiology. Several issues have been sufficiently clarified, although investigated only in a few model species. However, further fundamental aspects remain unknown, mainly regarding molecular features and interactions with other signaling pathways, thus requiring further elucidation. J. Exp. The discovery of cyclic AMP (cAMP) about 50 years ago was the crucial event leading to our current paradigm of second-messenger signaling, through which many hormones, neurotransmitters, odorants, and autocrine/paracrine regulators modulate physiological functions. Other second messengers were discovered from then on; however, cAMP has never left its center stage. Biological and genetic evidence point to roles for cAMP in a vast array of biological systems, including oogenesis and embryogenesis, development, hormone secretion, olfaction, cardiac contraction, smooth muscle relaxation, metabolism, etc. Therefore, understanding the cAMP-dependent pathway in all its parts became a scientific priority that prompted to a remarkable amount of studies and relevant achievements (Diel et al., 2008;Sadana and Dessauer, 2009). Admittedly, the pathway once considered simple and straightforward became very complex, thus requiring more and more sophisticated investigations mainly focused on mammalian cells. If this is easily understandable also for the implications of cAMP signaling in human health and possible therapeutic applications, the counterpart is a rather scarce knowledge of the system in nonmammalian vertebrates and invertebrates.The present review focuses on the cAMP-dependent pathway in bivalve molluscs, aimed at collecting and ordering the research outputs produced in this regard. Bivalve molluscs are the model animals currently studied in our laboratories, and we did experience such fragmented information. Moreover, growing interest is addressed to these animals as widely cultivated aquaculture species and sentinel organisms used for evaluating the environmental quality. Undoubtedly cAMP plays a role in these contexts and an organized set of information would be of be...

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Seasonal changes of nucleotides in mussel (Mytilus galloprovincialis) mantle tissue

Cited by 12 publications

References 39 publications

Biochemical changes in oyster tissues and hemolymph during long-term air exposure

Biochemical changes in oyster tissues and hemolymph during long-term air exposure

Biochemical and genetic characteristics of suspension-cultured mussels (Mytilus edulis) in relation to byssal thread production and losses by fall-off

Cyclic AMP signaling in bivalve molluscs: an overview

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