The effect of acute salinity stress on the activity of key enzymes of the American oyster, Crassostrea virginica Gmelin.

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dc.acquisition-srcen_US
dc.call-noQL 430.7 .09 C7 1977 GBAYen_US
dc.contract-noen_US
dc.contributor.authorCripps, R.A.en_US
dc.contributor.otheren_US
dc.date.accessioned2010-02-15T17:04:26Z
dc.date.available2010-02-15T17:04:26Z
dc.date.issued1977en_US
dc.degreeen_US
dc.description78 p., Dissertationen_US
dc.description-otheren_US
dc.description.abstractThe enzymatic responses of individual tissues are variable for acute salinity stress. Adductor muscle in all cases exhibited a predominant anaerobic pathway, but concomittant activity of enzymes such as GDH and GOT associated with the citric acid cycle indicated that this pathway, although operative, was at a low level. Gill and to a less degree, mantle had only minor activity in this cycle. Tissues that were subjected to hypoosmotic stress had greater enzymatic responses initially, but the pattern of enzymatic adjustments were quite similar in both acclimating populations. In later acclimating periods, the majority of enzymes in all tissues tended to return to enzyme-substrate affinity levels close to those of the control, which generally followed known patterns of amino acid and substrate change during acclimation. The pivotal role of PK and PEPCK in aerobic- anaerobic transition was indicated by substrate affinity changes in both enzymes, particularly for adductor muscle. Initially in gill, PK changes were similar to the adductor, but in later periods of acclimation, the 8 %. population differed from the 32 %. population. The anaerobic pathway predominated in all three tissues, the levels of activity reflected the metabolic needs of the acclimating organisms and the adjustments made in amino acid levels and substrate utilization.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.geo-codeTexas coasten_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/21571
dc.latitudeen_US
dc.locationGBIC Collectionen_US
dc.longitudeen_US
dc.notesen_US
dc.placeCollege Station, Texasen_US
dc.publisherTexas A&M Universityen_US
dc.relation.ispartofseries3778.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectAmerican oysteren_US
dc.subjectCrassostrea virginicaen_US
dc.subjectoystersen_US
dc.subjectsalinity effectsen_US
dc.subjectsalinity toleranceen_US
dc.subjectstressen_US
dc.subjectenzymesen_US
dc.subjectbiochemical analysisen_US
dc.titleThe effect of acute salinity stress on the activity of key enzymes of the American oyster, Crassostrea virginica Gmelin.en_US
dc.typeBooken_US
dc.universityen_US
dc.vol-issueen_US

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