Abstract
Thermogenesis in the appendix of Sauromatum venosum inflorescence can be induced by aspirin, salicylic acid, and 2-6-dihydroxybenzoic acid. The contribution of mitochondrial F<sub>0</sub>F<sub>1</sub> ATP synthase, adenine nucleotide translocator, and alternative oxidase to induced thermogenesis in various light and dark regimes was studied. Sections of the appendix of the Sauromatum appendix were incubated with each of three inducers under a series of different photoperiods ranging from 6-48 h of dark or light regimes.
Highlights
Aspirin (ASA), Salicylic acid (SA), and 2,6-DHBA induce thermogenesis in tissue slices of the Sauromatum appendix over a wide range of concentrations [1]
The present paper provides evidence that Adenine nucleotide translocator (ANT), mitochondrial complex V (CV) and Alternative oxidase (AOX) generate heat in the Sauromatum appendix in the presence of the three inducers
The weak thermogenic response to inducers under 9 to 12 h of darkness seems to coincide with a shift in the timing of induced thermogenesis
Summary
Aspirin (ASA), SA, and 2,6-DHBA induce thermogenesis in tissue slices of the Sauromatum appendix over a wide range of concentrations [1]. It has been shown that mitochondrial OXPHOS activity is a prerequisite for this inducible thermogenesis [2]. Suppression of induced thermogenesis was observed when Sauromatum appendix tissue slices were treated with a diverse set of inhibitors of the mitochondrial electron transport chain under constant light. Treatment with 2 mM SHAM did not completely suppress temperature rise. OM (a CV inhibitor) and CATR (an ANT inhibitor) suppressed temperature rise. One source is AOX and two other likely additional heat sources are CV and ANT. The inhibitors affect only mitochondrial functions in the Sauromatum appendix tissue because the tissue lacks chloroplasts [3]
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