摘要: 1. Crude suspensions of chloroplasts show a distinct accessory respiration in the dark. 2. During illumination such evolution oxygen is not observed, on contrary uptake increases 2–3 fold. 3. The crude dark inhibited by HCN (up to 0.04%). during period increased moderate concentration (0.02%) and retarded somewhat higher concentrations (> 4. affected addition glucose either or illumination. 5. asparagine both increase may exceed considerably which occurs period. 6. manganese does affect rate period, when added often temporarily markedly increased. 7. Chlorosis brought about too high iron ratio assumed be caused photo oxidation chlorophyll secondary effect rapid destruction protective protein substances presence extremely redox potentials.