Differential partitioning of thiols and glucosinolates between shoot and root in Chinese cabbage upon excess zinc exposure

Détails bibliographiques
Publié dans:	Journal of plant physiology. - 1979. - 244(2020) vom: 15. Jan., Seite 153088
Auteur principal:	Aghajanzadeh, Tahereh A (Auteur)
Autres auteurs:	Prajapati, Dharmendra H, Burow, Meike
Format:	Article en ligne
Langue:	English
Publié:	2020
Accès à la collection:	Journal of plant physiology
Sujets:	Journal Article Chinese cabbage Glucosinolates Sulfur metabolism Thiols Zinc Plant Proteins Sulfhydryl Compounds J41CSQ7QDS

Description
Résumé:	Copyright © 2019 Elsevier GmbH. All rights reserved. Zinc (Zn) is one of the important elements of plant growth, however, at elevated level it is toxic. Exposure of Chinese cabbage to elevated Zn2+ concentrations (5 and 10 μM ZnCl2) resulted in enhancement of total sulfur and organic sulfur concentration. Transcript level of APS reductase (APR) as a key enzyme in biosynthesis of primary sulfur compounds (cysteine and thiols), was up-regulated in both shoot and root upon exposure to elevated Zn2+, which was accompanied by an increase in the concentration of cysteine in both tissues. In contrast, the concentration of thiols increased only in the root by 5.5 and 15-fold at 5 and 10 μM Zn2+, respectively, which was in accompanied by an upregulation of ATP sulfurylase, an enzyme responsible for activation of sulfate. An elevated content of glucosinolates, mostly indolic glucosinolates, only in the shoot of plants exposed to excess level of Zn2+ coincided with an increase in gene expression of key biosynthetic enzymes and regulators (CYP79B3, CYP83B1, MYB34). Thus distinct acuumulation patterns of sulfur containing compounds in root and shoot of Chinese cabbage may be a strategy for Chinese cabbage to combat with exposure to excess Zn
Description:	Date Completed 13.04.2020 Date Revised 30.09.2020 published: Print-Electronic Citation Status MEDLINE
ISSN:	1618-1328
DOI:	10.1016/j.jplph.2019.153088