Temperature effect on growth rates of Eriophorum vaginatum roots |
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Authors: | Barhara A. Ellis Jochen Kummerow |
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Affiliation: | (1) Botany Department, San Diego State University, 921820058 San Diego, CA, USA |
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Abstract: | Summary Root growth rates of the sedge Eriophorum vaginatum L. were studied under controlled environmental conditions. The air temperature was maintained constant at 15°C while the root temperatures varied in 5°C intervals between 2° and 37° C (12° C excluded). Root growth rates of 1.2 mm d-1 at 2°, 20.4 mm d-1 at 32° C and 10.1 mm d-1 at 37° C were recorded. A Q10 of 3.2 was calculated for the temperature range from 7° to 27° C. Root growth rates at temperatures above 17° C declined after one week of growth. The degree of decline was proportional to the applied root temperature. Depletion of available nonstructural carbohydrate was the probable cause for this decline. |
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