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Profile of water vapor density near the cucumber leaf surface was examined in comparison with air temperature profile in relation to effects of air current and stomatal responses to environment. Profi...le of water vapor density was different from air temperature profile. The difference was estimated to be caused by stomatal and cuticular resistances for transpiration and appeared in the large gap of water vapor density at leaf surface. Furthermore, differences were found between profiles on adaxial and abaxial surfaces, which were considered to be caused by more turbulent air current and higher transpiration rate on abaxial leaf surface. Air conditions such as temperature, saturation vapor deficit and wind velocity of ambient air outside the boundary layer affected the profile of water vapor density, and these effects of air conditions closely related to stomatal responses which made the stomatal resistance higher at the lower air temperatures, the higher saturation deficits and the higher wind velocities.show more
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Export Mendeley
KJ00004506732