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Temperature Effects on Root Respiration

The rate of root respiration increases with temperature. The rate of enzymatic reactions increases in warmer temperature, causing an increase in plant metabolism and growth. Root respiration speeds up in response to the greater energy demands.

Acclimatization
- Depending on the plant species, roots acclimatize to different temperatures and adjust their respiratory rates accordingly. After a period of slower respiration and metabolism in colder weather, at a given temperature threshold, growth respiration begins and spring growth is stimulated.
Dieback
- During the warmest times of the year, the increased root respiration rate may result in carbohydrate starvation. The roots die back while growth of plant shoots continues to be supported.
Additional Facts
- Temperature is only one of a number of factors that influence root respiration. Water and nutrient supply, soil acidity and salinity must also be considered.

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