Hand 1988 Science

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Publications in the MiPMap
Hand SC, Gnaiger E (1988) Anaerobic dormancy quantified in Artemia embryos: A calorimetric test of the control mechanism. Science 239:1425-7.

» PMID: 17769739, ProQuest, Bioblast Access

Hand SC, Gnaiger E (1988) Science

Abstract: Continuous measurement of heat dissipation from brine shrimp embryos during reversible transitions from aerobic development to anaerobic dormancy demonstrates a primary role for intracellular pH (pHi) in this metabolic switching. Artificially elevating the depressed pHi during anoxia by adding ammonia markedly reactivates metabolism, as judged by increases in heat dissipation, trehalose catabolism, and the ratio of adenosine triphosphate to adenosine diphosphate. Energy flow during anaerobic dormancy is suppressed to 2.4 percent of aerobic values, which is the lowest percentage thus far reported for euryoxic animals. Use of diguanosine tetraphosphate stores cannot account for this observed heat dissipation. Thus, mobilizing trace amounts of trehalose may explain the energy metabolism during quiescence.

Keywords: Twin-Flow

O2k-Network Lab: AT Innsbruck Gnaiger E, US LA Baton Rouge Hand SC


Labels: MiParea: Respiration, Comparative MiP;environmental MiP, Developmental biology 

Stress:Ischemia-reperfusion  Organism: Artemia, Crustaceans 

Preparation: Intact organism 

Regulation: ADP, ATP, pH  Coupling state: ROUTINE 


CaloRespirometry, Twin-Flow