Plant Response to heat and Drought Stress

Stem and needle temperatures were continually measured throughout the growing season. Fine-wire Type T thermocouples were attached to selected needles and stems of a number of randomly selected seedlings. The thermocouples were attached to a Campbell Scientific 21X datalogger. Soil surface temperatures during midsummer exceeded 60C and caused significant levels of mortality in the population of first-year seedlings.

Peter F. Kolb, Research Associate, Department of Forest Resources

Funded by McIntire-Stennis Research Grants Program, USDA.