Effects of ammonia on gill (Na+, K+)-ATPase kinetics in a hololimnetic population of the Amazon River shrimp Macrobrachium amazonicum

Daniela P Garçon,Leonardo M Fabri,Cintya M Moraes, Maria Izabel C Costa, Renata S Freitas,John C McNamara,Francisco A Leone

Aquatic Toxicology（2022）

Cited 2|Views0

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Abstract

•Mean LC50-96 h total ammonia concentration was 49.27 mg L−1•Ammonia exposure increased (Na+, K+)-, V(H+)- and (K+)-ATPase activities•Ammonia exposure increased (Na+, K+)-ATPase affinity for NH4+ by 2.5-fold•Ouabain inhibition of (Na+, K+)-ATPase was unaffected by ammonia exposure

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Key words

Ammonia toxicity,gill (Na+, K+)-ATPase kinetics,microsomal fraction,mean lethal ammonia concentration,freshwater shrimp aquaculture

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