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Biogenic volatile organic compound and respiratory CO₂ emissions after ¹³C-labeling: online tracing of C translocation dynamics in poplar plants

Ghirado, A.; Gutknecht, J. 1; Zimmer, I. 1; Brüggemann, N. 1; Schnitzler, J. P. 1
1 Karlsruher Institut für Technologie (KIT)

Background: Globally plants are the primary sink of atmospheric CO2, but are also the major contributor of a large spectrum of atmospheric reactive hydrocarbons such as terpenes (e.g. isoprene) and other biogenic volatile organic compounds (BVOC). The prediction of plant carbon (C) uptake and atmospheric oxidation capacity are crucial to define the trajectory and consequences of global environmental changes. To achieve this, the biosynthesis of BVOC and the dynamics of C allocation and translocation in both plants and ecosystems are important.
Methodology: We combined tunable diode laser absorption spectrometry (TDLAS) and proton transfer reaction mass spectrometry (PTR-MS) for studying isoprene biosynthesis and following C fluxes within grey poplar (Populus x canescens) saplings. This was achieved by feeding either 13CO2 to leaves or 13C-glucose to shoots via xylem uptake. The translocation of 13CO2 from the source to other plant parts could be traced by 13C-labeled isoprene and respiratory 13CO2 emission.
Principal Finding: In intact plants, assimilated 13CO2 was rapidly translocated via the phloem to the roots within 1 hour, with an average phloem transport velocity of 20.3±2.5 cm h21. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/110087648
Veröffentlicht am 24.05.2018
DOI: 10.1371/journal.pone.0017393
Zitationen: 52
Web of Science
Zitationen: 53
Zitationen: 58
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2011
Sprache Englisch
Identifikator ISSN: 1932-6203
KITopen-ID: 110087648
HGF-Programm 12.02.01 (POF II, LK 01) Glob.Wandel und Auswirk. auf Ökosysteme
Erschienen in PLoS one
Verlag Public Library of Science (PLoS)
Band 6
Heft 2
Seiten e17393/1-15
Nachgewiesen in Dimensions
Web of Science
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