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Title: Two distinct plant respiratory physiotypes might exist which correspond to fast-growing and slow-growing species
Author: Nogués Mestres, Salvador
Aljazairi López, Salvador
Arias, Claudia
Sánchez, Elena
Aranjuelo Michelena, Iker
Keywords: Plantes
Creixement (Plantes)
Respiració de les plantes
Growth (Plants)
Plant respiration
Issue Date: 15-Aug-2014
Publisher: Elsevier
Abstract: The origin of the carbon atoms in CO2 respired by leaves in the dark of several plant species has been studied using 13C/12C stable isotopes. This study was conducted using an open gas exchange system for isotope labeling that was coupled to an elemental analyser and further linked to an isotope ratio mass spectrometer (EA-IRMS) or coupled to a gas chromatography-combustion-isotope ratio mass spectrometer (GC-C-IRMS). We demonstrate here that the carbon, which is recently assimilated during photosynthesis, accounts for nearly ca. 50% of the carbon in the CO2 lost through dark respiration after illumination in fast-growing and cultivated plants and trees and, accounts for only ca. 10% in slow-growing plants. Moreover, our study shows that fast- growing plants, which had the largest percentages of newly fixed carbon of leaf-respired CO2 , were also those with the largest shoot/root ratios, whereas slow-growing plants showed the lowest shoot/root values.
Note: Versió postprint del document publicat a:
It is part of: Journal of Plant Physiology, 2014, vol. 171, num. 13, p. 1157-1163
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ISSN: 0176-1617
Appears in Collections:Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)

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