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Open Access Green as soon as Postprint is submitted to ZB.
UV-B mediated metabolic rearrangements in poplar revealed by non-targeted metabolomics.
Plant Cell Environ. 38, 892-904 (2015)
Plants have to cope with various abiotic stresses including UV-B radiation (280-315 nm). UV-B radiation is perceived by a photoreceptor, triggers morphological responses and primes plant defense mechanisms such as antioxidant levels, photo-repair or accumulation of UV-B screening pigments. As poplar is an important model system for trees, we elucidated the influence of UV-B on overall metabolite patterns in poplar leaves grown under high UV-B radiation. Combining non-targeted metabolomics with gas exchange analysis and confocal microscopy we aimed understanding how UV-B radiation triggers metabolome-wide changes, affects isoprene emission, photosynthetic performance, epidermal light attenuation and finally how isoprene-free poplars adjust their metabolome under UV-B radiation. Exposure to UV-B radiation caused a comprehensive rearrangement of the leaf metabolome. Several hundreds of metabolites were up and down-regulated over various pathways. Our analysis, revealed the up-regulation of flavonoids, anthocyanins and polyphenols and the down-regulation of phenolic precursors in the first 36 hours of UV-B treatment. We also observed a down-regulation of steroids after 12 hours. The accumulation of phenolic compounds leads to a reduced light transmission in UV-B-exposed plants. However, the accumulation of phenolic compounds was reduced in non-isoprene emitting plants suggesting a metabolic- or signaling-based interaction between isoprenoid and phenolic pathways.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Fourier Transform Ion Cyclotron Resonance Mass Spectrometry ; Populus X Canescens ; Uv-b ; Non-targeted Metabolomics; Chromatography-mass Spectrometry; Isoprene-emitting Poplars; Synthase Messenger-rna; Chrysosplenium-americanum; Anthocyanin Biosynthesis; Ultraviolet-radiation; Arabidopsis-thaliana; Flavonol Glucosides; Tissue Localization; Chalcone Synthase
ISSN (print) / ISBN
0140-7791
e-ISSN
1365-3040
Journal
Plant, Cell and Environment
Quellenangaben
Volume: 38,
Issue: 5,
Pages: 892-904
Publisher
Wiley
Publishing Place
Malden, MA
Non-patent literature
Publications
Reviewing status
Peer reviewed