The blue-light reaction in plasmodia of Physarum polycephalum is coupled to respiration
作者： W. Korohoda , Z. Shraideh , Z. Baranowski , K. E. Wohlfarth-Bottermann
DOI: 10.1007/BF00395403
关键词: Phototaxis 、 Biochemistry 、 Respiration 、 Physarum polycephalum 、 Glycolysis 、 Physarum 、 Glycine 、 Biology 、 Cellular respiration 、 Mitochondrion
摘要: The influence of inhibitors energy metabolism (2-deoxy-D-glucose, monoiodoacetate, KCN) as well various substrates for respiration (sodium acetate, glycine, glutamine, α-ketoglutarate, pyruvate) were investigated with respect to the effect blue light (450 nm) on contractile behaviour plasmodial strands Physarum polycephalum. When is not experimentally modified, induces a prolongation period contraction-relaxation cycle. This appears within 2–3 min and seems represent primary reaction this organism light. Inhibition by KCN completely abolished response blue-light irradiation. In contrast, an impediment glycolysis enhanced effect. indicates that related respiration, i.e., function mitochondria. Among different only α-ketoglutarate combined pyruvate applied in presence showed enhancement photoresponse, increase amplitude force oscillations. α-ketoglutarate-dehydrogenase complexes functioning mitochondrial are involved plasmodia
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