Record Details

Title:
Effects of air humidity on the photosynthesis and fruit-set of tomato under high temperature
Publication date:
2010
Summary:
The effects of air relative humidity (RH) on the photosynthesis and fruit-set of tomato seedling under high temperature were investigated in growth chambers. Three air relative humidity treatments from 10:00 to 16:00 were 70%+- 5%(high RH), 55%+-5% C middle RH)and non-humidification (low RH, as control) . The results showed under the high temperature (the average temperature from 10:00 to 16:00 was 33 - 43 °C), high RH treatment significantly promoted transpiration rate and net photosynthetic rate, also decreased or eliminated the photosynthetic midday depression compared with low RH treatment. Hence, the cumulative value of transpiration and photosynthesis from 9:00 to 17:00 of high RH treatment were 116% - 133% and 31 % - 343% higher than that of low RH treatment, respectively. The fruit-set rate of high RH treatment was up to 48% and significantly higher than low RH treatment. However, photosynthesis and fruit-set rate of middle RH treatment were not significantly different compared wit? that of low RH treatment. As a conclusion, relative humidity of70% (high RH) improved photosynthesis and fruit-set of tomato under high temperature above 30 °C.
Call number:
A:PS
Journal citation:
Contact information:
harvest@worldveg.org

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 Record created 2010-04-20, last modified 2019-07-02


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