It is generally believed that the influence of light on respiration is indirect even though physiologists like Emerson and Lewis (1943) have reported that Illuminated Chlorella cells have a higher rate of respiration than those kept in darkness. A similar effect on barley seedlings has been observed by Johnson (1944). But there is no stoppage of respiration indirectly by governing the supply of respirable materials via photosynthesis. Another influence of ligh is that by increasing temperature, it increases the rate of respiration.