title: Multiple-flash development of thermoluminescence bands in dark-grown spruce leaves.
abstract: Spruce leaves greened in darkness were devoid of three of the five thermoluminescence bands found for mature leaves. These bands were developed rapidly by exposure of the dark-grown leaves to continuous light. The development of these bands was studied by illumination with repetitive flashes at varied intervals. Flashes at intervals of 1 s were the most effective in inducing these bands. Those at shorter or longer intervals were less effective. It was deduced from these data that the development of these bands is a multiquantum process which involves at least two photo-events with a dark reaction between them.
mesh_terms: D002736:Chloroplasts / Q000378:metabolism; D003624:Darkness; D008027:Light; D008163:Luminescent Measurements; D010788:Photosynthesis; D010944:Plants / Q000378:metabolism*; D013696:Temperature; D013997:Time Factors