Decrease of labile Zn and Cd in the rhizosphere of hyperaccumulating Thlaspi caerulescens with time

Environmental Pollution
Jacynthe Dessureault-RompréBernd Nowack

Abstract

By using a rhizobox micro-suction cup technique we studied in-situ mobilization and complexation of Zn and Cd in the rhizosphere of non-hyperaccumulating Thlaspi perfoliatum and two different Thlaspi caerulescens ecotypes, one of them hyperaccumulating Zn, the other Zn and Cd. The dynamic fraction (free metal ions and small labile complexes) of Zn and Cd decreased with time in the rhizosphere solution of the respective hyperaccumulating T. caerulescens ecotypes, and at the end of the experiment, it was significantly smaller than in the other treatments. Furthermore, the rhizosphere solutions of the T. caerulescens ecotypes exhibited a higher UV absorptivity than the solution of the T. perfoliatum rhizosphere and the plant-free soil. Based on our findings we suggest that mobile and labile metal-dissolved soil organic matter complexes play a key role in the rapid replenishment of available metal pools in the rhizosphere of hyperaccumulating T. caerulescens ecotypes, postulated earlier.

References

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Citations

May 22, 2013·Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine·Thanchanok KangwankraiphaisanGeoffrey Michael Gadd
Jan 14, 2016·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Jiřina SzákováPavel Tlustoš
Dec 1, 2014·Botanical Studies·Nada ElloumiFerjani Ben Abdallah
Jul 31, 2019·International Journal of Phytoremediation·Manuel Salas-Moreno, José Marrugo-Negrete
Apr 6, 2017·Journal of Environmental Quality·Carla E RosenfeldCarmen E Martínez
May 6, 2020·Plants·Habiba BalafrejMouna Fahr
Aug 24, 2018·International Journal of Environmental Research and Public Health·Wei-Qing YaoHan-Jie Ye

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