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

Autor: Schulz E; Max-Planck-Institut f�r Molekulare Pflanzenphysiologie, Am M�hlenberg 1, Potsdam 14476, Germany.; MetaSysX GmbH, Am M�hlenberg 11, Potsdam 14476, Germany., Tohge T; Max-Planck-Institut f�r Molekulare Pflanzenphysiologie, Am M�hlenberg 1, Potsdam 14476, Germany.; Graduate School of Biological Science, Nara Institute of Science and Technology (NAIST), Ikoma, 630-0192 Japan., Winkler JB; Research Unit Environmental Simulation, Institute of Biochemical Plant Pathology, Helmholtz Zentrum M�nchen, German Research Center for Environmental Health, Ingolst�dter Landstr. 1, Neuherberg 85764, Germany., Albert A; Research Unit Environmental Simulation, Institute of Biochemical Plant Pathology, Helmholtz Zentrum M�nchen, German Research Center for Environmental Health, Ingolst�dter Landstr. 1, Neuherberg 85764, Germany.; Deutsches Patent- und Markenamt, Zweibr�ckenstr. 12, M�nchen 80331, Germany., Sch Ffner AR; Institute of Biochemical Plant Pathology, Helmholtz Zentrum M�nchen, German Research Center for Environmental Health, Ingolst�dter Landstr. 1, Neuherberg 85764, Germany., Fernie AR; Max-Planck-Institut f�r Molekulare Pflanzenphysiologie, Am M�hlenberg 1, Potsdam 14476, Germany., Zuther E; Max-Planck-Institut f�r Molekulare Pflanzenphysiologie, Am M�hlenberg 1, Potsdam 14476, Germany., Hincha DK; Max-Planck-Institut f�r Molekulare Pflanzenphysiologie, Am M�hlenberg 1, Potsdam 14476, Germany.
Jazyk: angličtina
Zdroj: Plant & cell physiology [Plant Cell Physiol] 2021 Jul 17; Vol. 62 (3), pp. 502-514.
DOI: 10.1093/pcp/pcab013
Abstrakt: 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.
(� The Author(s) 2021. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists.)
Databáze: MEDLINE
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