Abstract
AbstractThe effect of red light (660 nm), far‐red light (730 nm) and dark treatment on the subsequent enzyme activity in homogenates of Avena coleoptiles was investigated. The activities of succinic dehydrogenase (SDH), lactic dehydro‐genase (LDH) and glucose‐6‐P dehydrogenase (GDH) were investigated. The activity of SDH was greatest in material receiving continuous darkness. LDH and GDH activity was stimulated by both light treatments compared with the dark values. Little or no difference in enzyme activity was found using either a single 15 min flash of light or continuous light for 24 h. Admixtures of extracts from dark treated and light treated material in a 1:1 ratio gave unexpected levels of enzyme activity. In all cases such admixtures gave much less than the anticipated enzyme activity.
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