PuSH - Publication Server of Helmholtz Zentrum München: Natural variation among <em>Arabidopsis </em>accessions in the regulation of flavonoid metabolism and stress gene expression by combined UV radiation and cold.

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Schulz, E.* ; Tohge, T.* ; Winkler, J.B. ; Albert, A. ; Schäffner, A. ; Fernie, A.R.* ; Zuther, E.* ; Hincha, D.K.*

Natural variation among Arabidopsis accessions in the regulation of flavonoid metabolism and stress gene expression by combined UV radiation and cold.

Plant Cell Physiol. 62, 502-514 (2021)

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	Open Access Gold (Paid Option)

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Plants are constantly exposed to stressful environmental conditions. Plant stress reactions were mainly investigated for single stress factors. However, under natural conditions plants may be simultaneously exposed to different stresses. Responses to combined stresses cannot be predicted from the reactions to the single stresses. Flavonoids accumulate in Arabidopsis thaliana during exposure to UV-A, UV-B, or cold, but the interactions of these factors on flavonoid biosynthesis were unknown. We therefore investigated the interaction of UV radiation and cold in regulating the expression of well-characterized stress-regulated genes, and on transcripts and metabolites of the flavonoid biosynthetic pathway in 52 natural Arabidopsis accessions that differ widely in their freezing tolerance. The data revealed interactions of cold and UV on the regulation of stress-related and flavonoid biosynthesis genes, and on flavonoid composition. In many cases, plant reactions to a combination of cold and UV were unique under combined stress and not predictable from the responses to the single stresses. Strikingly, all correlations between expression levels of flavonoid biosynthesis genes and flavonol levels were abolished by UV-B exposure. Similarly, correlations between transcript levels of flavonoid biosynthesis genes or flavonoid contents, and freezing tolerance were lost in the presence of UV radiation, while correlations with the expression levels of cold regulated genes largely persisted. This may indicate different molecular cold acclimation responses in the presence or absence of UV radiation.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Arabidopsis Thaliana ; Uv Radiation ; Cold Acclimation ; Flavonoids ; Natural Genetic Variation ; Stress Tolerance; Light Signal-transduction; Ultraviolet-b Radiation; Low-temperature Stress; Freezing Tolerance; Photomorphogenic Responses; Transcription Factors; Water-deficit; Cor15a Gene; Acclimation; Drought

ISSN (print) / ISBN 0032-0781

e-ISSN 1471-9053

Journal Plant & cell physiology

Quellenangaben Volume: 62, Issue: 3, Pages: 502-514

Publisher Oxford University Press

Publishing Place Oxford

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Research Unit Environmental Simulation (BIOP-EUS)
Institute of Biochemical Plant Pathology (BIOP)

Grants Deutsche Bundesstiftung Umwelt
Max Planck Society