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The effect of soil temperature on transpiration rates in cucumber, cucurbit and their grafted plants (grafted cucumber plant with a stock of cucurbit plant) was examined by heat balance analysis of th...e leaf in an on-line measurement. In cucumber plant, higher transpiration rates were found at soil temperatures of 15 to 30℃, and soil temperatures below 15 or above 30℃ resulted in a decrease in transpiration rate. In cucurbit plant, transpiration rates were higher at soil temperatures of 10 to 40℃ and decreased at other soil temperatures. Thus, the transpiration in cucurbit plant was kept higher even at lower and higher soil temperatures of 10 and 35-40℃ where the transpiration in cucumber plant decreased. This fact suggests that cucurbit plant is more active in water uptake into roots in wider region of soil temperature, as compared with cucumber plant. In the grafted plant, the pattern of transpiration rates responding to soil temperature was similar to that in cucurbit plant. From this pattern in the grafted plant, it could be conceivable that the activity of the cucurbit roots used as a stock is responsible for water process in the grafted cucumber plant in relation to the soil temperature.続きを見る
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Mendeley出力
KJ00004506718