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Monson, R.K.* ; Winkler, J.B. ; Rosenstiel, T.N.* ; Block, K. ; Merl-Pham, J. ; Strauss, S.H.* ; Ault, K.* ; Maxfield, J.* ; Moore, D.J.P.* ; Trahan, N.A.* ; Neice, A.A.* ; Shiach, I.* ; Barron-Gafford, G.A.* ; Ibsen, P.* ; McCorkel, J.T.* ; Bernhardt, J.* ; Schnitzler, J.-P.

High productivity in hybrid-poplar plantations without isoprene emission to the atmosphere.

Proc. Natl. Acad. Sci. U.S.A. 117, 1596-1605 (2020)
Publ. Version/Full Text Postprint DOI PMC
Open Access Green
Hybrid-poplar tree plantations provide a source for biofuel and biomass, but they also increase forest isoprene emissions. The consequences of increased isoprene emissions include higher rates of tropospheric ozone production, increases in the lifetime of methane, and increases in atmospheric aerosol production, all of which affect the global energy budget and/or lead to the degradation of air quality. Using RNA interference (RNAi) to suppress isoprene emission, we show that this trait, which is thought to be required for the tolerance of abiotic stress, is not required for high rates of photosynthesis and woody biomass production in the agroforest plantation environment, even in areas with high levels of climatic stress. Biomass production over 4 y in plantations in Arizona and Oregon was similar among genetic lines that emitted or did not emit significant amounts of isoprene. Lines that had substantially reduced isoprene emission rates also showed decreases in flavonol pigments, which reduce oxidative damage during extremes of abiotic stress, a pattern that would be expected to amplify metabolic dysfunction in the absence of isoprene production in stress-prone climate regimes. However, compensatory increases in the expression of other proteomic components, especially those associated with the production of protective compounds, such as carotenoids and terpenoids, and the fact that most biomass is produced prior to the hottest and driest part of the growing season explain the observed pattern of high biomass production with low isoprene emission. Our results show that it is possible to reduce the deleterious influences of isoprene on the atmosphere, while sustaining woody biomass production in temperate agroforest plantations.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Oxidative Stress ; Thermotolerance ; Genetically Modified Organism ; Biofuel ; Hydroxy ; Radical; Protects Photosynthesis; Lignocellulosic Biomass; Label-free; Drought; Thermotolerance; Impact; Climate; Leaves; Future; Biosynthesis
Language english
Publication Year 2020
HGF-reported in Year 2020
ISSN (print) / ISBN 0027-8424
e-ISSN 1091-6490
Journal Proceedings of the National Academy of Sciences of the United States of America
Quellenangaben Volume: 117, Issue: 3, Pages: 1596-1605 Article Number: , Supplement: ,
Publisher National Academy of Sciences
Publishing Place 2101 Constitution Ave Nw, Washington, Dc 20418 Usa
Reviewing status Peer reviewed
Institute(s) Research Unit Environmental Simulation (EUS)
CF Metabolomics & Proteomics (CF-MPC)
POF-Topic(s) 30202 - Environmental Health
30203 - Molecular Targets and Therapies
Research field(s) Environmental Sciences
Enabling and Novel Technologies
PSP Element(s) G-504991-001
G-505700-001
A-630700-001
DOI 10.1073/pnas.1912327117
WOS ID WOS:000508977600053
Scopus ID 85078183014
PubMed ID 31907313
Erfassungsdatum 2020-03-09
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