TY - JOUR

T1 - Mild osmotic stress in intertidal gastropods Littorina saxatilis and Littorina obtusata (Mollusca: Caenogastropoda): a proteomic analysis

AU - Muraeva, Olga A.

AU - Мальцева, Арина Леонидовна

AU - Варфоломеева, Марина Александровна

AU - Михайлова, Наталья Аркадьевна

AU - Гранович, Андрей Игоревич

PY - 2017/11/25

Y1 - 2017/11/25

N2 - Salinity is a crucial abiotic environmental factor for marine animals, affecting their physiology and geographic ranges. Deviation of environmental salinity from the organismal optimum range results in an osmotic stress in osmoconformers, which keep their fluids isotonic to the environment. The ability to overcome such stress is critical for animals inhabiting areas with considerable salinity variation, such as intertidal areas. In this study, we compared the reaction to mild water freshening (from 24 to 14 ‰) in two related species of intertidal snails, Littorina saxatilis and L. obtusata, with respect to several aspects: survival, behavior and proteomic changes. Among these species, L. saxatilis is more tolerant to low salinity and survives in estuaries. We found out that the response of these species was much milder (with no mortality or isolation reaction observed) and involved weaker proteomic changes than during acute stress (freshening from 24 to 10 ‰), characterized earlier. The proteomic response of the second species, L. obtusata, was weaker (6 % vs 10 % of regulated proteins) than that of L. saxatilis and engaged a mostly different set of proteins. Among proteins potentially involved in adaptation to low salinity, we identified enzymes of energetic metabolism and antioxidant response, chaperones, proteins of extracellular matrix and cytoskeleton, ion channels and regulators of cell growth and proliferation.

AB - Salinity is a crucial abiotic environmental factor for marine animals, affecting their physiology and geographic ranges. Deviation of environmental salinity from the organismal optimum range results in an osmotic stress in osmoconformers, which keep their fluids isotonic to the environment. The ability to overcome such stress is critical for animals inhabiting areas with considerable salinity variation, such as intertidal areas. In this study, we compared the reaction to mild water freshening (from 24 to 14 ‰) in two related species of intertidal snails, Littorina saxatilis and L. obtusata, with respect to several aspects: survival, behavior and proteomic changes. Among these species, L. saxatilis is more tolerant to low salinity and survives in estuaries. We found out that the response of these species was much milder (with no mortality or isolation reaction observed) and involved weaker proteomic changes than during acute stress (freshening from 24 to 10 ‰), characterized earlier. The proteomic response of the second species, L. obtusata, was weaker (6 % vs 10 % of regulated proteins) than that of L. saxatilis and engaged a mostly different set of proteins. Among proteins potentially involved in adaptation to low salinity, we identified enzymes of energetic metabolism and antioxidant response, chaperones, proteins of extracellular matrix and cytoskeleton, ion channels and regulators of cell growth and proliferation.

KW - salinity adaptation

KW - osmotic stress

KW - proteomic analysis

KW - intertidal molluscs

KW - periwinkles

KW - Littorina

KW - 2D-DIGE

U2 - 10.21638/11701/spbu03.2017.305

DO - 10.21638/11701/spbu03.2017.305

M3 - Article

VL - 62

SP - 202

EP - 213

JO - Biological Communications

JF - Biological Communications

SN - 2542-2154

IS - 3

M1 - 305

ER -