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  Rust infection of black poplar trees reduces photosynthesis but does not affect isoprene biosynthesis or emission

Eberl, F., Perreca, E., Vogel, H., Wright, L., Hammerbacher, A., Veit, D., et al. (2018). Rust infection of black poplar trees reduces photosynthesis but does not affect isoprene biosynthesis or emission. Frontiers in Plant Science, 9: 1733. doi:10.3389/fpls.2018.01733.

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http://dx.doi.org/10.3389/fpls.2018.01733 (Publisher version)
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 Creators:
Eberl, Franziska1, 2, Author              
Perreca, Erica1, 2, Author              
Vogel, Heiko3, Author              
Wright, Louwrance1, Author              
Hammerbacher, Almuth1, Author              
Veit, Daniel4, Author              
Gershenzon, Jonathan1, Author              
Unsicker, Sybille1, Author              
Affiliations:
1Department of Biochemistry, Prof. J. Gershenzon, MPI for Chemical Ecology, Max Planck Society, ou_421893              
2IMPRS on Ecological Interactions, MPI for Chemical Ecology, Max Planck Society, Jena, DE, ou_421900              
3Department of Entomology, Prof. D. G. Heckel, MPI for Chemical Ecology, Max Planck Society, ou_421895              
4MPI for Chemical Ecology, Max Planck Society, ou_24027              

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 Abstract: Poplar (Populus spp.) trees are widely distributed and play an important role in ecological communities and in forestry. Moreover, by releasing high amounts of isoprene, these trees impact global atmospheric chemistry. One of the most devastating diseases for poplar is leaf rust, caused by fungi of the genus Melampsora. Despite the wide distribution of these biotrophic pathogens, very little is known about their effects on isoprene biosynthesis and emission. We therefore infected black poplar (P. nigra) trees with the rust fungus M. larici-populina and monitored isoprene emission and other physiological parameters over the course of infection to determine the underlying mechanisms. We found an immediate and persistent decrease in photosynthesis during infection, presumably caused by decreased stomatal conductance mediated by increased ABA levels. At the same time, isoprene emission remained stable during the time course of infection, consistent with the stability of its biosynthesis. There was no detectable change in the levels of intermediates or gene transcripts of the methylerythritol 4-phosphate (MEP) pathway in infected compared to control leaves. Rust infection thus does not affect isoprene emission, but may still influence the atmosphere via decreased fixation of CO2.

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 Dates: 2018-11-072018-11-272018
 Publication Status: Published in print
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 Identifiers: Other: GER536
DOI: 10.3389/fpls.2018.01733
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Title: Frontiers in Plant Science
  Abbreviation : Front. Plant Sci.
Source Genre: Journal
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Publ. Info: Lausanne : Frontiers Media
Pages: - Volume / Issue: 9 Sequence Number: 1733 Start / End Page: - Identifier: ISSN: 1664-462X
CoNE: https://pure.mpg.de/cone/journals/resource/1664462X