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

• DOI: 10.1111/pce.12643
• Publication Date: 2015-09-21T20:02:50Z
• Authors: Werner Jud; Elisa Vanzo; Ziru Li; Andrea Ghirardo; Ina Zimmer; Thomas D. Sharkey; Armin Hansel; Jörg‐Peter Schnit...
• Keywords: Isoprene; Green leaf volatiles

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