Fluctuations in the heart rate of abalone in response to low salinity stress

Transcriptome analysis reveals fluid shear stress (FSS) and atherosclerosis pathway as a candidate molecular mechanism of short-term low salinity stress tolerance in abalone

“…Similarly, we could assume that the significant down-regulation in the expression of DD’s HSP90 at 12 h and 24 h could be due to surpassed tolerance boundaries and diminished energy budget, contrary to what was observed in the hybrid DF. Such an assumption would be consistent with our earlier data [ 15 ] on the heart rates of the two species under hypo-osmotic stress, where the performance of the hybrid DF suggested a better metabolic activity and energy balance than DD. In addition, Shen et al [ 107 ] also demonstrated how the hybrid DF is a better metabolic modulator under hypoxia treatment.…”

“…From previously reported studies, we understand how abalone adapts to environmental salinity changes by maintaining their osmotic pressure balance, which is achieved via regulation of their intracellular ions, hemolymph free amino acids, and changes in ion-regulatory genes expression [ 6 – 8 ]. Furthermore, abalone achieves salinity adaptation through modulation of the heart rate by adjusting oxygen consumption and respiratory metabolism [ 5 , 15 ]. Moreover, immune defense is accomplished via the regulation of antioxidant genes and the employment of hemolymph parameters like phagocytosis and respiratory burst [ 7 , 9 ].…”

“…Luckily, abalone hybrids have shown superiority in tolerating diverse environmental stresses over their purebred counterparts and have benefited the Chinese abalone aquaculture industry [ 10 , 12 – 15 ]. However, there is a dearth of practical proof regarding the mechanisms driving their phenotypic differences to salinity tolerance.…”