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Applied Microbiology and Biotechnology

, Volume 97, Issue 13, pp 5669–5679 | Cite as

Poplar genetic engineering: promoting desirable wood characteristics and pest resistance

  • A. PolleEmail author
  • D. Janz
  • T. Teichmann
  • V. Lipka
Mini-Review

Abstract

Worldwide biomass demand for industrial applications, especially for production of biofuels, is increasing. Extended cultivation of fast growing trees such as poplars may contribute to satisfy the need for renewable resources. However, lignin, which constitutes about 20–30 % of woody biomass, renders poplar wood recalcitrant to saccharification. Genetic engineering of the enzymes of the lignification pathway has resulted in drastic decreases in lignin and greatly improved the carbohydrate yield for ethanol fermentation. While uncovering key enzymes for lignification facilitated rapid biotechnological progress, knowledge on field performance of low-lignin poplars is still lagging behind. The major biotic damage is caused by poplar rust fungi (Melampsora larici-populina), whose defense responses involve lignification and production of phenolic compounds. Therefore, manipulation of the phenylpropanoid pathway may be critical and should be tightly linked with new strategies for improved poplar rust tolerance. Emerging novel concepts for wood improvement are discussed.

Keywords

Biotechnology Defense Lignin Populus Rust 

Notes

Acknowledgments

Work in the laboratories of the authors is funded by the European Communities in the seventh framework (WATBIO), the German Federal Government (BMBF through the program BEST), the Niedersächsisches Ministerium für Wissenschaft und Kultur (program KLIFF) and the Deutsche Forschungsgemeinschaft (DFG), whose support we gratefully acknowledge.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Forest Botany and Tree Physiology, Büsgen-InstitutGeorg-August Universität GöttingenGöttingenGermany
  2. 2.Plant Cell Biology, Albrecht von Haller InstitutGeorg-August Universität GöttingenGöttingenGermany

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