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Studies on the rate of leaf emergence in tobacco plants. 3. Effect of soil temperature on water absorption, root respiration and the assimilate distribution pattern in tobacco seedlings


, : Studies on the rate of leaf emergence in tobacco plants. 3. Effect of soil temperature on water absorption, root respiration and the assimilate distribution pattern in tobacco seedlings. Bulletin of the Utsunomiya Tobacco Experiment Station (9): 39-47

In experiments with tobacco, the rate of water uptake was greater at a soil temperature of 30 deg C than at 10-15 deg , rates being 7.8 and 3.6 ml/g dry weight, respectively. In attached tobacco roots the amount of CO2 respired/h was 20.5 mg/g dry weight at high soil temperature (30 deg ) and 12.4 mg at low temperature (15 deg ); in detached roots, however, values were 4.5 and 1.9 mg, respectively.

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