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  Natural Variation among Arabidopsis Accessions in the Regulation of Flavonoid Metabolism and Stress Gene Expression by Combined UV Radiation and Cold

Schulz, E., Tohge, T., Winkler, J. B., Albert, A., Schäffner, A. R., Fernie, A. R., et al. (2021). Natural Variation among Arabidopsis Accessions in the Regulation of Flavonoid Metabolism and Stress Gene Expression by Combined UV Radiation and Cold. Plant and Cell Physiology. Retrieved from https://doi.org/10.1093/pcp/pcab013.

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 Creators:
Schulz, E.1, Author              
Tohge, T.2, Author              
Winkler, J Barbro3, Author
Albert, Andreas3, Author
Schäffner, Anton R3, Author
Fernie, A. R.2, Author              
Zuther, E.1, Author              
Hincha, D. K.1, Author              
Affiliations:
1Transcript Profiling, Infrastructure Groups and Service Units, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753306              
2Central Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753339              
3external, ou_persistent22              

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 Abstract: 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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Language(s): eng - English
 Dates: 2021
 Publication Status: Published in print
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Title: Plant and Cell Physiology
  Other : Plant Cell Physiol.
Source Genre: Journal
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Publ. Info: Kyoto [etc.] : Japanese Society of Plant Physiologists.
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 0032-0781
CoNE: https://pure.mpg.de/cone/journals/resource/954925434423