INVESTIGADORES
SCHLEICH Cristian Eric
artículos
Título:
Salinity dependent Na+-K+ATPase activity in gills of the euryhaline crab Chasmagnathus granulata
Autor/es:
SCHLEICH, C.E., GOLDEMBERG, L., LOPEZ MANANES, A.
Revista:
General Physiology and Biophysics
Referencias:
Año: 2001 vol. 20 p. 255 - 266
ISSN:
0231-5882
Resumen:
The occurrence and response of Na+-K+ATPase speci c activity to
environmental salinity changes were studied in gill extracts of all of the gills of
the euryhaline crab Chasmagnathus granulata from Mar Chiquita coastal lagoon
(Buenos Aires Province, Argentina). All of the gills exhibited a salinity dependent
Na+-K+ATPase activity, although the pattern of response to environmental
salinity was dierent among gills. As described in other euryhaline crabs highest
Na+-K+ATPase speci c activity was found in posterior gills (6 to 8), which, with
exception of gill 6, increased upon acclimation to reduced salinity. However, a high
increase of activity also occurred in anterior gills (1 to 5) in diluted media. Furthermore,
both short and long term dierential changes of Na+-K+ATPase activity
occurred among the gills after the transfer of crabs to reduced salinity. The fact
that variations of Na+-K+ATPase activity in the gills were concomitant with the
transition from osmoconformity to ionoregulation suggests that this enzyme is a
component of the branchial ionoregulatory mechanisms at the biochemical level in
this crab.+-K+ATPase speci c activity to
environmental salinity changes were studied in gill extracts of all of the gills of
the euryhaline crab Chasmagnathus granulata from Mar Chiquita coastal lagoon
(Buenos Aires Province, Argentina). All of the gills exhibited a salinity dependent
Na+-K+ATPase activity, although the pattern of response to environmental
salinity was dierent among gills. As described in other euryhaline crabs highest
Na+-K+ATPase speci c activity was found in posterior gills (6 to 8), which, with
exception of gill 6, increased upon acclimation to reduced salinity. However, a high
increase of activity also occurred in anterior gills (1 to 5) in diluted media. Furthermore,
both short and long term dierential changes of Na+-K+ATPase activity
occurred among the gills after the transfer of crabs to reduced salinity. The fact
that variations of Na+-K+ATPase activity in the gills were concomitant with the
transition from osmoconformity to ionoregulation suggests that this enzyme is a
component of the branchial ionoregulatory mechanisms at the biochemical level in
this crab.Chasmagnathus granulata from Mar Chiquita coastal lagoon
(Buenos Aires Province, Argentina). All of the gills exhibited a salinity dependent
Na+-K+ATPase activity, although the pattern of response to environmental
salinity was dierent among gills. As described in other euryhaline crabs highest
Na+-K+ATPase speci c activity was found in posterior gills (6 to 8), which, with
exception of gill 6, increased upon acclimation to reduced salinity. However, a high
increase of activity also occurred in anterior gills (1 to 5) in diluted media. Furthermore,
both short and long term dierential changes of Na+-K+ATPase activity
occurred among the gills after the transfer of crabs to reduced salinity. The fact
that variations of Na+-K+ATPase activity in the gills were concomitant with the
transition from osmoconformity to ionoregulation suggests that this enzyme is a
component of the branchial ionoregulatory mechanisms at the biochemical level in
this crab.+-K+ATPase activity, although the pattern of response to environmental
salinity was dierent among gills. As described in other euryhaline crabs highest
Na+-K+ATPase speci c activity was found in posterior gills (6 to 8), which, with
exception of gill 6, increased upon acclimation to reduced salinity. However, a high
increase of activity also occurred in anterior gills (1 to 5) in diluted media. Furthermore,
both short and long term dierential changes of Na+-K+ATPase activity
occurred among the gills after the transfer of crabs to reduced salinity. The fact
that variations of Na+-K+ATPase activity in the gills were concomitant with the
transition from osmoconformity to ionoregulation suggests that this enzyme is a
component of the branchial ionoregulatory mechanisms at the biochemical level in
this crab.+-K+ATPase speci c activity was found in posterior gills (6 to 8), which, with
exception of gill 6, increased upon acclimation to reduced salinity. However, a high
increase of activity also occurred in anterior gills (1 to 5) in diluted media. Furthermore,
both short and long term dierential changes of Na+-K+ATPase activity
occurred among the gills after the transfer of crabs to reduced salinity. The fact
that variations of Na+-K+ATPase activity in the gills were concomitant with the
transition from osmoconformity to ionoregulation suggests that this enzyme is a
component of the branchial ionoregulatory mechanisms at the biochemical level in
this crab.+-K+ATPase activity
occurred among the gills after the transfer of crabs to reduced salinity. The fact
that variations of Na+-K+ATPase activity in the gills were concomitant with the
transition from osmoconformity to ionoregulation suggests that this enzyme is a
component of the branchial ionoregulatory mechanisms at the biochemical level in
this crab.+-K+ATPase activity in the gills were concomitant with the
transition from osmoconformity to ionoregulation suggests that this enzyme is a
component of the branchial ionoregulatory mechanisms at the biochemical level in
this crab.
Key words: Chasmagnathus granulata | Crustacean|Gill | Na+-K+Chasmagnathus granulata | Crustacean|Gill | Na+-K+