Diurnal variations of transpiration rate and stomatal resistance and their relations to the drought resistance of fruit trees under varying weather conditions
1988
Wang Zhongchun | Huang Zhen | Luo Xinshu (Shandong Agricultural Univ., Taian (China). Dept. of Horticulture)
The diurnal variations of stomatal resistance (RS) and transpiration rate (Tr) under the suitable temperature light intensity and relative humidity showed a single-peak curve i.e. Tr, reached a maximal value and Rs a maximal value and Rs a minimal one when the temperature and light intensity reached the peak values at midday. The drought-resistant species under the suitable conditions, but under the high temperature, high light intensity and low relative humidity, the highest drought-resistant plant, had the lowest Tr and the highest Rs at midday among the date, apple, grape and peach trees. It indicated that Tr was quickly reduced when the plants were turned to the unsuitable conditions.
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