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Original Paper

Biophysics and Physiology of Temperature Regulation in Thermogenic Flowers

Roger S. Seymour
Bioscience Reports Apr 01, 2001, 21 (2) ; DOI: 10.1023/A:1013608627084
Roger S. Seymour
Department of Environmental Biology, University of Adelaide, Adelaide, SA, 5005, Australia
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Abstract

The flowers or inflorescences of certain primitive seed plants are able to regulate their temperature during blooming by modulating the rate of heat production to remain much warmer than the surroundings. A large drop in ambient temperature causes a smaller drop in flower temperature which causes an increase in the rate of heat production by futile involvement of the cytochrome and alternative oxidase respiratory pathways. The result is that the rate of heat production is inversely related to ambient temperature and flower temperature remains high and relatively independent of ambient temperature. While the biophysics of thermal balance in the whole flowers is better understood, the regulation of the biochemical heat-generating pathways is not known.

  • Thermogenic flowers
  • respiration
  • cytochrome oxidase
  • alternative oxidase
  • plant mitochondria
  • thermal inhibition
  • plant biochemistry
  • © 2001 Plenum Publishing Corporation
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April 2001

Volume: 21 Issue: 2

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Biophysics and Physiology of Temperature Regulation in Thermogenic Flowers
Roger S. Seymour
Bioscience Reports Apr 2001, 21 (2) 223-236; DOI: 10.1023/A:1013608627084
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Biophysics and Physiology of Temperature Regulation in Thermogenic Flowers
Roger S. Seymour
Bioscience Reports Apr 2001, 21 (2) 223-236; DOI: 10.1023/A:1013608627084

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Keywords

Thermogenic flowers
respiration
cytochrome oxidase
Alternative oxidase
plant mitochondria
thermal inhibition
plant biochemistry

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