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https://hdl.handle.net/2440/16542
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Type: | Journal article |
Title: | Expression of uncoupling protein and alternative oxidase depends on lipid or carbohydrate substrates in thermogenic plants |
Author: | Ito, K. Seymour, R. |
Citation: | Biology Letters, 2005; 1(4):427-430 |
Publisher: | The Royal Society |
Issue Date: | 2005 |
ISSN: | 1744-9561 1744-957X |
Statement of Responsibility: | K. Ito and R.S. Seymour |
Abstract: | Thermogenesis, in which cellular respiratory activity is considerably stimulated, requires mitochondrial uncoupling protein (UCP) in mammals and an alternative oxidase (AOX) in plants. Here, we show that the genes for both proteins are expressed in thermogenic plants, but the type correlates with the respiratory substrate. A novel gene termed PsUCPa encoding a variant of UCP was specifically expressed in thermogenic flowers of Philodendron selloum, which uses lipids as substrates. However, a gene termed DvAOX encoding for AOX protein was expressed in thermogenic flowers of Dracunculus vulgaris, which presumably uses carbohydrates as substrates. These findings suggest that cellular metabolism is a major determinant in selective expression of appropriate thermogenic genes in plants. |
Keywords: | Araceae Philodendron Oxidoreductases Ion Channels Mitochondrial Proteins Plant Proteins Calorimetry Temperature Carbohydrate Metabolism Lipid Metabolism Uncoupling Protein 1 |
Description: | © 2005 The Royal Society |
DOI: | 10.1098/rsbl.2005.0338 |
Published version: | http://dx.doi.org/10.1098/rsbl.2005.0338 |
Appears in Collections: | Aurora harvest 2 Earth and Environmental Sciences publications |
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