Abstract
Daily changes in the highest leaf surface temperature were measured in the summer of 1978 at Heiwa Avenue, Hiroshima, where plants were suffered severe drought conditions.
The leaf surface temperature exceeded the ambient temperature at any time during the measurement. The leaf surface temperature of non-sclerophytes grown in Hiroshima showed as high as that of desert plants. Daily changes of the leaf surface temperature were classified as three types; Radiation type in which the maximum leaf surface temperature was attained at the highest intensity of solar radiation. Air temperature type in which the leaf surface temperature indicated almost constant values during the day time where the air temperature showed scarce change, and Compromised type. Average differences in temperature between the air and the leaf surface in Radiation, Air temperature and Compromised type were 13, 6 and 10°C, respectively.
