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Jud, W.* ; Vanzo, E. ; Li, Z.* ; Ghirardo, A. ; Zimmer, I. ; Sharkey, T.D.* ; Hansel, A.* ; Schnitzler, J.-P.

Effects of heat and drought stress on post illumination bursts of volatile organic compounds in isoprene emitting and non-emitting poplar.

Plant Cell Environ. 39, 1204-1215 (2016)

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Over the last decades, post illumination bursts (PIBs) of isoprene, acetaldehyde and green leaf volatiles (GLVs) following rapid light-to-dark transitions have been reported for a variety of different plant species. However, the mechanisms triggering their release still remain unclear. Here we measured PIBs of isoprene emitting (IE) and isoprene non-emitting (NE) grey poplar plants grown under different climate scenarios (ambient control and three scenarios with elevated CO₂ concentrations: elevated control, periodic heat and temperature stress, chronic heat and temperature stress, followed by recovery periods). PIBs of isoprene were unaffected by elevated CO₂ and heat and drought stress in IE, while they were absent in NE plants. On the other hand, PIBs of acetaldehyde and also GLVs were strongly reduced in stress-affected plants of all genotypes. After recovery from stress, distinct differences in PIB emissions in both genotypes confirmed different precursor pools for acetaldehyde and GLV emissions. Changes in PIBs of GLVs, almost absent in stressed plants and enhanced after recovery, could be mainly attributed to changes in lipoxygenase activity. Our results indicate that acetaldehyde PIBs, which recovered only partly, derive from a new mechanism in which acetaldehyde is produced from methylerythritol phosphate pathway intermediates, driven by deoxyxylulose phosphate synthase activity.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Acetaldehyde ; Climate Change Scenarios ; Green Leaf Volatiles ; Grey Poplar ; Isoprene ; Lox ; Populus X Canescens ; Post-illumination Bursts ; Voc; Methylerythritol 4-phosphate Pathway; Reaction Mass-spectrometry; Acetaldehyde Emission; Online Analysis; Soybean Seed; Leaves; Plants; Acid; Biosynthesis; Arabidopsis

ISSN (print) / ISBN 0140-7791

e-ISSN 1365-3040

Journal Plant, Cell and Environment

Quellenangaben Volume: 39, Issue: 6, Pages: 1204-1215

Publisher Wiley

Publishing Place Malden, MA

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Research Unit Environmental Simulation (BIOP-EUS)
Institute of Biochemical Plant Pathology (BIOP)