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The levels of sulfur-containing metabolites in Brassica napus are not influenced by the circadian clock but diurnally

Hornbacher, Johann, Rumlow, Annekathrin, Pallmann, Philip ORCID:, Turcios, Ariel E, Riemenschneider, Anja and Papenbrock, Jutta 2019. The levels of sulfur-containing metabolites in Brassica napus are not influenced by the circadian clock but diurnally. Journal of Plant Biology 62 (5) , pp. 359-373. 10.1007/s12374-019-0143-x

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Adapting biological processes to an endogenous rhythm enables plants to cope with the daily changes in light and temperature in a more predictable way enhancing growth and fitness. A number of biological processes such as metabolic pathways as well as the immunity in plants are under diurnal or circadian control. In this study a possible circadian regulation of key enzymes in the sulfur assimilation and the corresponding metabolites was investigated in the agriculturally important crop plant oilseed rape (Brassica napus). Leaves of a commercially available cultivar were harvested in the course of a day under diurnal and under free-running conditions with constant light. Analyses in this study were focused on sulfur-containing metabolites and expression analysis of enzymes involved in sulfur assimilation. Expression analysis showed that the transcript levels of the sulfate transporters Sultr3;1 and Sultr4;2 as well as APR2 and APR3 oscillated diurnally. Results revealed a periodic rhythm of sulfur-containing metabolites such as glutathione, sulfate and certain glucosinolates in the course of a day which were only partly maintained under constant light. Therefore, we conclude that a diurnal rhythm and not the circadian clock regulates sulfur metabolism in plants.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
Centre for Trials Research (CNTRR)
Subjects: Q Science > QK Botany
S Agriculture > SB Plant culture
Publisher: Springer Verlag (Germany)
ISSN: 1226-9239
Date of First Compliant Deposit: 30 October 2019
Date of Acceptance: 30 July 2019
Last Modified: 06 Nov 2023 20:32

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