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Title

Two distinct plant respiratory physiotypes might exist which correspond to fast-growing and slow-growing species

AuthorsNogués, Salvador; Aljazairi, Salvador; Arias, Claudia; Sánchez, Elena; Aranjuelo, Iker
KeywordsCarbon stable isotopes
Fast- and slow-growing plants
Photosynthesis
Respiration
Issue Date2014
PublisherElsevier
CitationJournal of Plant Physiology 171(13): 1157- 1163 (2014)
AbstractThe 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 analyzer 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 (Rd) 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.
Publisher version (URL)http://dx.doi.org/10.1016/j.jplph.2014.03.006
URIhttp://hdl.handle.net/10261/126056
DOI10.1016/j.jplph.2014.03.006
Identifiersdoi: 10.1016/j.jplph.2014.03.006
issn: 0176-1617
Appears in Collections:(IDAB) Artículos
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