This work is dedicated to the memory of Hanns Ulrich Seitz who died on 17 August 2011.
Isoprene emission-free poplars – a chance to reduce the impact from poplar plantations on the atmosphere
Article first published online: 5 DEC 2011
© 2011 The Authors. New Phytologist © 2011 New Phytologist Trust
Special Issue: Featured papers on ‘Bioenergy trees’
Volume 194, Issue 1, pages 70–82, April 2012
How to Cite
Behnke, K., Grote, R., Brüggemann, N., Zimmer, I., Zhou, G., Elobeid, M., Janz, D., Polle, A. and Schnitzler, J.-P. (2012), Isoprene emission-free poplars – a chance to reduce the impact from poplar plantations on the atmosphere. New Phytologist, 194: 70–82. doi: 10.1111/j.1469-8137.2011.03979.x
- Issue published online: 24 FEB 2012
- Article first published online: 5 DEC 2011
- Received: 25 August 2011, Accepted: 14 October 2011
- biomass production;
- non-isoprene emitting;
- outdoor conditions;
- Populus × canescens
- •Depending on the atmospheric composition, isoprene emissions from plants can have a severe impact on air quality and regional climate. For the plant itself, isoprene can enhance stress tolerance and also interfere with the attraction of herbivores and parasitoids.
- •Here, we tested the growth performance and fitness of Populus × canescens in which isoprene emission had been knocked down by RNA interference technology (PcISPS-RNAi plants) for two growing seasons under outdoor conditions.
- •Neither the growth nor biomass yield of the PcISPS-RNAi poplars was impaired, and they were even temporarily enhanced compared with control poplars. Modelling of the annual carbon balances revealed a reduced carbon loss of 2.2% of the total gross primary production by the absence of isoprene emission, and a 6.9% enhanced net growth of PcISPS-RNAi poplars. However, the knock down in isoprene emission resulted in reduced susceptibility to fungal infection, whereas the attractiveness for herbivores was enhanced.
- •The present study promises potential for the use of non- or low-isoprene-emitting poplars for more sustainable and environmentally friendly biomass production, as reducing isoprene emission will presumably have positive effects on regional climate and air quality.