Plant distribution and the temperature coefficient of metabolism
Article first published online: 28 APR 2006
Plant, Cell & Environment
Volume 17, Issue 3, pages 233–243, March 1994
How to Cite
CRIDDLE, R. S., HOPKIN, M. S., McARTHUR, E. D. and HANSEN, L. D. (1994), Plant distribution and the temperature coefficient of metabolism. Plant, Cell & Environment, 17: 233–243. doi: 10.1111/j.1365-3040.1994.tb00289.x
- Issue published online: 28 APR 2006
- Article first published online: 28 APR 2006
- Received 24 May 1993; received in revised form 16 August 1993; accepted for publication 27 September 1993.
- plant distribution;
- activation energy;
- temperature coefficient
The spatial distribution of a plant species is limited by the range of climatic conditions to which the species can adapt. Temperature is one of the most significant determinants of plant distribution, but except for the effects of lethal limits, little is known about physiological changes in responses to differences in environmental temperature. In this study, temperature coefficients of non-photosynthetic metabolism have been determined in the normal environmental temperature range for selected annual and perennial plants. Distinct differences were found in the temperature coefficient of metabolism of woody perennial plants from high latitudes and high elevations and closely related low-latitude and low-elevation plants. Low-latitude and low-elevation woody perennials have Arrhenius temperature coefficients for metabolism that are larger than those for congeneric high-latitude and high-elevation plants. The Arrhenius temperature coefficient is not rapidly adapted to new environments. A simple function was developed relating Arrhenius temperature coefficient to latitude and elevation for accessions of three, woody, perennial species complexes of plants collected from a wide geographic range but grown in common gardens. Within these taxa, plants that experience broader ranges of temperature during growth in their native habitat have smaller temperature coefficients. Temperature coefficients also varied with growth stage or season. No similar relationship was found for annuals and herbaceous perennials. For the plants tested, Arrhenius temperature coefficients are high during early spring growth, but shift to lower values later in the season. The shift in Arrhenius temperature coefficients occurs early in the season for southern and low-elevation plants and progressively later for plants from further north or higher elevation. The changes in Arrhenius temperature coefficients result largely from increases in plant metabolic rates at lower temperatures while little change occurs in the rates at higher temperatures. Altering the temperature dependence of the control of metabolic rate is apparently an important means of response to climate change.