Publication

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

Aghajanzadeh, T. A., Prajapati, D. H. & Burow, M., Jan-2020, In : Journal of Plant Physiology. 244, 9 p., 153088.

Research output: Contribution to journalArticleAcademicpeer-review

Copy link to clipboard

Documents

  • Differential partitioning of thiols and glucosinolates between shoot and root

    Final publisher's version, 1.23 MB, PDF document

    Request copy

DOI

  • Tahereh A. Aghajanzadeh
  • Dharmendra H. Prajapati
  • Meike Burow

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.

Original languageEnglish
Article number153088
Number of pages9
JournalJournal of Plant Physiology
Volume244
Publication statusPublished - Jan-2020

    Keywords

  • Chinese cabbage, Glucosinolates, Thiols, Sulfur metabolism, Zinc, ARABIDOPSIS-THALIANA, ATP SULFURYLASE, BRASSICA-OLERACEA, PHYSIOLOGICAL FUNCTIONS, SECONDARY METABOLITES, TRANSCRIPTION FACTORS, SULFATE TRANSPORT, ASSIMILATION, CADMIUM, BIOSYNTHESIS

ID: 127083384