Histidine-mediated xylem loading of zinc is a species-wide character in Noccaea caerulescens.

A. Kozhevnikova, I.V. Seregin, N.T. Erlikh, T.A. Shevyreva, I.M. Andreev, R. Verweij, H. Schat

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Histidine plays a crucial role in nickel (Ni) translocation in Ni-hyperaccumulating plants. Here, we investigated its role in zinc (Zn) translocation in four accessions of the Zn hyperaccumulator, Noccaea caerulescens, using the related non-hyperaccumulator, Thlaspi arvense, as a reference. We compared the effects of exogenous histidine supply on Zn xylem loading, and of Zn-histidine complex formation on Zn uptake in energized tonoplast vesicles. The Zn distribution patterns over root tissues were also compared. Exogenous histidine supply enhanced Zn xylem loading in all the N. caerulescens accessions, but decreased it in T. arvense. Zn distribution patterns over root tissues were similar, apart from the accumulation in cortical and endodermal cells, which was much lower in N. caerulescens than in T. arvense. Zn uptake in energized tonoplast vesicles was inhibited significantly in N. caerulescens, but not affected significantly in T. arvense, when Zn was supplied in combination with histidine in a 1 : 2 molar ratio. Histidine-mediated Zn xylem loading seems to be a species-wide character in N. caerulescens. © 2014 New Phytologist Trust.
Original languageEnglish
Pages (from-to)508-519
JournalNew Phytologist
Issue number203
DOIs
Publication statusPublished - 2014

Fingerprint Dive into the research topics of 'Histidine-mediated xylem loading of zinc is a species-wide character in Noccaea caerulescens.'. Together they form a unique fingerprint.

Cite this