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Open Access Green as soon as Postprint is submitted to ZB.
Why only some plants emit isoprene.
Plant Cell Environ. 36, 503-516 (2013)
Isoprene (2-methyl-1,3-butadiene) is emitted from many plants and it appears to have an adaptive role in protecting leaves from abiotic stress. However, only some species emit isoprene. Isoprene emission has appeared and been lost many times independently during the evolution of plants. As an example, our phylogenetic analysis shows that isoprene emission is likely ancestral within the family Fabaceae (= Leguminosae), but that it has been lost at least 16 times and secondarily gained at least 10 times through independent evolutionary events. Within the division Pteridophyta (ferns), we conservatively estimate that isoprene emissions have been gained five times and lost two times through independent evolutionary events. Within the genus Quercus (oaks), isoprene emissions have been lost from one clade, but replaced by a novel type of light-dependent monoterpene emissions that uses the same metabolic pathways and substrates as isoprene emissions. This novel type of monoterpene emissions has appeared at least twice independently within Quercus, and has been lost from 9% of the individuals within a single population of Quercus suber. Gain and loss of gene function for isoprene synthase is possible through relatively few mutations. Thus, this trait appears frequently in lineages; but, once it appears, the time available for evolutionary radiation into environments that select for the trait is short relative to the time required for mutations capable of producing a non-functional isoprene synthase gene. The high frequency of gains and losses of the trait and its heterogeneous taxonomic distribution in plants may be explained by the relatively few mutations necessary to produce or lose the isoprene synthase gene combined with the assumption that isoprene emission is advantageous in a narrow range of environments and phenotypes.
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Publication type
Article: Journal article
Document type
Review
Keywords
drought; ferns; fitness; phloem; phylogeny; substrate; temperature; thermotolerance; Volatile Organic-compounds ; Emission Rates ; Terrestrial Ecosystems ; Monoterpene Emission ; Compound Emissions ; Quercus Fagaceae ; Elevated Co2 ; Synthase ; Carbon ; Vegetation
ISSN (print) / ISBN
0140-7791
e-ISSN
1365-3040
Journal
Plant, Cell and Environment
Quellenangaben
Volume: 36,
Issue: 3,
Pages: 503-516
Publisher
Wiley
Publishing Place
Malden, MA
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Research Unit Environmental Simulation (BIOP-EUS)