. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. J " neq g dry tissue h Figure 2. Relationship between net fluxes of CI and Na* in pond- water-acclimated Corbicula fiimiinea. J„, net flux, expressed as /jeq g*' dry tissue h^'. J„'' = -^ () J„'~'", R = , n = 35, P < ponent of Na* uptake stimulated by salt depletion is at least partially dependent on the presence of external CI". As shown in Tables III and IV, the effect of AZ on base net flux was consistent in the two experiments with SD C. fluminea. AZ significantly increased the net l
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. J " neq g dry tissue h Figure 2. Relationship between net fluxes of CI and Na* in pond- water-acclimated Corbicula fiimiinea. J„, net flux, expressed as /jeq g*' dry tissue h^'. J„'' = -^ () J„'~'", R = , n = 35, P < ponent of Na* uptake stimulated by salt depletion is at least partially dependent on the presence of external CI". As shown in Tables III and IV, the effect of AZ on base net flux was consistent in the two experiments with SD C. fluminea. AZ significantly increased the net loss of titratable base. The increase of net base flux was about 4 //eq g ' dry tissue h ' in PW medium, peq g ' dry tissue h^' in Na*-free bathing medium, and peq g"' dry tissue h ' in Cl-free bathing medium. No statistical interaction between external CP or Na* and AZ was observed, indicating that the net flux of base was not affected by the absence of external CI or Na*. In both PWA and SD C. fluminea. the net flux of titrat- able base was not affected by the absence of external CI". However, a regression between CI" influx and net flux of base from individual animals demonstrated a significant linear relationship (Fig. 3. R = and for SD and PWA animals, respectively, f < ). In all experiments, a greater CI influx conelated with a greater base net flux. The slope of the regression for PWA animals was not statistically different from that of SD animals, sug- gesting that the relationship between CI influx and base net flux is stoichiometrically similar in both acclimation conditions. Discussion The relationship between CI' and Na'^ transport ill C. fluminea Na* transport in C. fluminea may be CP-independent or Cl-dependent, depending on the acclimation condi- tions. Na* transport and the component of Na* active uptake stimulated by 5HT were Cl-independent in PWA (pondwater-acclimated) animals. However, a substantial fraction of Na*
Size: 1841px × 1357px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, booksubjectbiology, booksubjectzoology
