Effects of Heat on the Physiology of Seedlings of Eucalyptus obliqua
- 1 January 1977
- journal article
- research article
- Published by CSIRO Publishing in Functional Plant Biology
- Vol. 4 (2), 283-288
- https://doi.org/10.1071/pp9770283
Abstract
Seedlings of E. obliqua L'Herit. were heated in air at different temperatures for various times. Mortality was assessed using a wide-range a.c. bridge, and the internal temperatures of the upper and lower stems and leaves were monitored. The extent of killing depended on both the temperature and the duration of heat. No killing occurred at 40°C and total killing occurred at 100°C; at intermediate temperatures, the extent of killing was a function of duration of treatment. The temperature inside the lower stem declined for 20 min after applying heat, followed by a gradual increase in parallel with the increase in temperature of the soil. This effect was attributed to the movement of water from the roots and soil into the lower stem, and could explain the capacity of seedlings of E. obliqua to survive a temperature of 80°C, which is higher than reported for other species.Keywords
This publication has 1 reference indexed in Scilit:
- 49. Bruno Huber und Eberhard Schmidt: Eine Kompensationsmethode zur thermoelektrischen Messung langsamer SaftströmeBerichte Der Deutschen Botanischen Gesellschaft, 1937