Intraspecific variation of metal preference patterns for hyperaccumulation in Thlaspi caerulescens: evidence from binary metal exposures

By A. Assunção, P. Bleeker, W. M. T. Bookum, R. Vooijs, H. Schat. Plant and Soil, 2008

88 citations recorded by the source corpus.

Metal preferences with regard to accumulation were compared between populations of the heavy metal hyperaccumulator Thlaspi caerulescens, originating from calamine, serpentine and non-metalliferous soils. Plants were exposed for 3 weeks to factorial combinations of concentrations of different metals in binary mixture in hydroponics. The nature and degree of the interactions varied significantly between populations. In the calamine, non-Cd/Ni-hyperaccumulating population, La Calamine, there were no one-sided or mutual antagonistic interactions among the metals with regard to their accumulation in the plant. In three other populations capable of Cd and Ni hyperaccumulation, from calamine, serpentine and non-metalliferous soil respectively, there were one-sided or mutual antagonistic interactions between Cd and Zn, Cd and Ni, and Ni and Zn, possibly resulting from competition for transporters involved in uptake or plant-internal transport. Significant synergistic interactions, probably resulting from regulation of transporter expression, were also found, particularly in the La Calamine population. All the populations seemed to express a more or less Zn-specific high-affinity system. The serpentine and the non-metallicolous populations seemed to posses low-affinity systems with a preference for Cd and Zn over Ni, one of which may be responsible for the Ni hyperaccumulation of the serpentine population in its natural environment. The calamine population from Ganges also seemed to express a strongly Cd-specific high-affinity system which is in part responsible for the Cd-hyperaccumulation phenotype exhibited by this population in its natural environment.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/5d1a26f479c0a17138adbd2882a02ba0f357bea0

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In Plant Science

1. Mark G. M. Aarts
2. N. Rascio
3. F. Navari-Izzo
4. C. Hermans
5. N. Verbruggen
6. H. Schat
7. Z. Hassan
8. G. Kaur

Citations in the corpus

• Heavy metal hyperaccumulating plants: how and why do they do it? And what makes them so interesting? (2011, background): “2) might also be employed in Ni entrance into roots [49].”
• Intraspecific variation, adaptation, and evolution (2011, unknown): “…with serpentine ecotypes displaying significantly greater Ni tolerance This content downloaded from 129.65.41.106 on Wed, 16 Oct 2019 01:33:07 UTC All use subject to https://about.jstor.org/terms intraspecific variation 125 and Ni uptake than nonserpentine ecotypes (Assunção et al. 2003, 2008).”
• Molecular mechanisms of metal hyperaccumulation in plants. (2009, background): “This is in agreement with the Zn-suppressible Ni hyperaccumulation in MP (Assunção et al., 2001, 2008).”
• Opportunities and feasibilities for biotechnological improvement of Zn, Cd or Ni tolerance and accumulation in plants (2011, background): “, 2005) showed constitutively high expression and was suggested to play a role in Zn tolerance (Assunção et al., 2001). Over-expression of TcZTP1 enhances tolerance and accumulation of Zn and Cd in A. thaliana, accumulation of Zn and tolerance to Zn, Cd and Ni in N. tabacum (Talukdar, Hassan and Aar”