Kinetic changes in flexor myosin ATPase of Scylla serrata adapted to different salinities

Krishnamoorthy, R. V.; Venkatramiah, A.

doi:10.1007/bf00349342

Cited by 3 publications

(1 citation statement)

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“…Littoral organisms are frequently exposed to salt stress associated with cycles of tidal flow, and much research has been devoted to physiological, behavioral, and morphological adaptations that allow marine invertebrates to cope with salinity changes. For example, research on the physiological responses of marine invertebrates to salt stress has yielded insights into oxygen consumption (Flemister and Flemister, 1951;Todd and Dehnel, 1960;Cheung, 1997), uptake of free amino acids (Hammen, 1969), nerve conduction (Tucker, 1970), properties of myosin ATPase (Krishnamoorthy and Venkatramiah, 1971), ionic composition and cell volume (Berger et al, 1978), and ammonia excretion (Cheung, 1997). Documented behavioral responses to salt stress include reduced swimming ability and feeding rate (Mann et al, 1991;Chaparro et al, 2008a), and shelled invertebrates react to changes in salinity by sequestering themselves from the outside environment through valve or operculum closure (Shumway, 1977;Berger and Kharazova, 1997;Kim et al, 2001;Chaparro et al, 2008bChaparro et al, , 2009 or by producing corporal mucus (McFarlane, 1980).…”

Section: Introductionmentioning

confidence: 99%

Impacts of Salt Stress on Locomotor and Transcriptomic Responses in the Intertidal GastropodBatillaria attramentaria

Rhee

Kim

et al. 2019

The Biological Bulletin

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Salinity is one of the most crucial environmental factors that structures biogeographic boundaries of aquatic organisms, affecting distribution, abundance, and behavior. However, the association between behavior and gene regulation underlying acclimation to changes in salinity remains poorly understood. In this study, we investigated the effects of salinity stress on behavior (movement distance) and patterns of gene expression (using RNA sequencing) of the intertidal gastropod Batillaria attramentaria. We examined responses to short-term (1-hour) and long-term (30-day) acclimation to a range of salinities (43, 33 [control], 23, 13, and 3 psu). We found that the intertidal B. attramentaria is able to tolerate a broad range of salinity from 13 to 43 psu but not the acute low salinity of 3 psu. Behavioral experiments showed that salt stress significantly influenced snails' movement, with lower salinity resulting in shorter movement distance. Transcriptomic analyses revealed critical metabolic pathways and genes potentially involved in acclimation to salinity stress, including ionic and osmotic regulation, signal and hormonal transduction pathways, water exchange, cell protection, and gene regulation or epigenetic modification. In general, our study presents a robust, integrative laboratory-based approach to investigate the effects of salt stress on a nonmodel gastropod facing detrimental consequences of environmental change. The current genetic results provide a wealth of reference data for further research on mechanisms of ionic and osmotic regulation and adaptive evolution of this coastal gastropod.

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