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: https://orcid.org/0000-0001-8274-9696, 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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Abstract

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
URI:	https://orca.cardiff.ac.uk/id/eprint/125926

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