Histidine promotes the loading of nickel and zinc, but not of cadmium, into the xylem in Noccaea caerulescens

Plant Signaling & Behavior
Anna D KozhevnikovaHenk Schat

Abstract

Histidine is known to be involved in Ni hyperaccumulation. Recently, histidine-dependent xylem loading of Ni and Zn has been demonstrated in the Zn/Ni/Cd hyperaccumulator, Noccaea caerulescens. Here we tested the hypothesis whether Cd xylem loading is histidine-dependent, too. In contrast to that of Ni and Zn, the xylem loading of Cd was not affected by exogenous histidine. Histidine accumulation in root cells appears to facilitate the radial transport of Ni and Zn, but not Cd, across the roots. This may be due to the relatively high preference of Cd for coordination with sulfur over coordination with nitrogen, in comparison with Ni and Zn.

References

Dec 4, 2004·Environmental Science & Technology·C Leigh BroadhurstCharles A Murphy
Jul 20, 2006·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·A X DeniauH Schat
Feb 23, 2013·Metal Ions in Life Sciences·Imre Sóvágó, Katalin Várnagy
Apr 23, 2014·The New Phytologist·Anna D KozhevnikovaHenk Schat

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Citations

Jul 15, 2015·Journal of Plant Physiology·Neda Dalir, Amir Hossein Khoshgoftarmanesh
Jul 13, 2020·Photosynthesis Research·I V Seregin, A D Kozhevnikova
Oct 9, 2021·Plant, Cell & Environment·Dorina Podar, Frans J M Maathuis

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