Near ultraviolet (365 nm) and green‐yellow (546‐579nm) radiations repress the growth of liquid cell cultures of Ginkgo pollen and of monolayer cultures of HeLa. The deleterious effects of green‐yellow wavelengths can be negated by red radiation; near‐u.v.‐induced growth repressions are insensitive to visible light photorestoration. These wavelengths do not interact synergistically and evoke different kinetics of response.
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Klein et al. (1967) studied this question.
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