Photosynthetic responses to high temperature

T. D. Sharkey, C. J. Bernacchi

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Predicting Photosynthesis at High Temperature: High temperature is known to have a detrimental effect on photosynthesis. When temperatures exceed the optimum for photosynthesis, lower rates of photosynthesis invariably occur (Fig. 19.1). The rapid increase in mean global temperatures and the increased frequencies of temperature extremes and droughts as a result of anthropogenic activities (IPCC, 2007) make understanding supraoptimal temperature effects on photosynthesis crucial because temperature-induced loss of carbon assimilation is likely to become more frequent. In understanding photosynthetic responses to temperature it is often necessary to mathematically describe the response of photosynthesis or some component process to temperature. Temperature responses are typically logarithmic, that is, processes increase by a set proportion for a given increase in temperature. Descriptions of temperature responses have taken many mathematical forms. One of the simplest was suggested by van’t Hoff (discussed in Lloyd and Taylor, 1994) by considering the effect of a 10°C increase in temperature, a parameter called the Q10 is calculated as:

Original languageEnglish (US)
Title of host publicationTerrestrial Photosynthesis in a Changing Environment a Molecular, Physiological and Ecological Approach
PublisherCambridge University Press
Pages290-298
Number of pages9
ISBN (Electronic)9781139051477
ISBN (Print)9780521899413
DOIs
StatePublished - Jan 1 2011

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

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