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  Root volatiles in plant–plant interactions I: High root sesquiterpene release is associated with increased germination and growth of plant neighbours

Gfeller, V., Huber, M., Förster, C., Huang, W., Köllner, T. G., & Erb, M. (2019). Root volatiles in plant–plant interactions I: High root sesquiterpene release is associated with increased germination and growth of plant neighbours. Plant, Cell and Environment, 42(6), 1950-1963. doi:10.1111/pce.13532.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-F8D8-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-A8AA-0
Genre: Journal Article

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http://dx.doi.org/10.1111/pce.13532 (Publisher version)
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 Creators:
Gfeller, Valentin, Author
Huber, Meret1, Author              
Förster, Christiane1, Author              
Huang, Wei, Author
Köllner, Tobias G.1, Author              
Erb, Matthias, Author
Affiliations:
1Department of Biochemistry, Prof. J. Gershenzon, MPI for Chemical Ecology, Max Planck Society, ou_421893              

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 Abstract: Volatile organic compounds (VOCs) emitted by plant leaves can influence the physiology of neighboring plants. In contrast to leaf VOCs, little is known about the role of root VOCs in plant‐plant interactions. Here, we characterize constitutive root VOC emissions of the spotted knapweed (Centaurea stoebe) and explore the impact of these VOCs on the germination and growth of different sympatric plant species. We show that C. stoebe roots emit high amounts of sesquiterpenes, with estimated release rates of (E)‐β‐caryophyllene above 3 μg g‐1 dw h‐1. Sesquiterpene emissions show little variation between different C. stoebe populations, but vary substantially between different Centaurea species. Through root transcriptome sequencing, we identify six root‐expressed sesquiterpene synthases (TPSs). Two root‐specific TPSs, CsTPS4 and CsTPS5, are sufficient to produce the full blend of emitted root sesquiterpenes. VOC‐exposure experiments demonstrate that C. stoebe root VOCs have neutral to positive effects on the germination and growth of different sympatric neighbors. Thus, constitutive root sesquiterpenes produced by two C. stoebe TPSs are associated with facilitation of sympatric neighboring plants. The release of root VOCs may thus influence plant community structure in nature.

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 Dates: 2019-01-192019-02-082019-06
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: Other: GER540
DOI: 10.1111/pce.13532
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Title: Plant, Cell and Environment
  Other : Plant, Cell & Environment
Source Genre: Journal
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Publ. Info: Oxford, England : Blackwell Science
Pages: - Volume / Issue: 42 (6) Sequence Number: - Start / End Page: 1950 - 1963 Identifier: ISSN: 0140-7791
CoNE: https://pure.mpg.de/cone/journals/resource/954925471334