Cited by 124Plant Micronutrient Interactions and EffectsTrace Elements in HealthPlant Molecular Biology Research

The five AhMTP1 zinc transporters undergo different evolutionary fates towards adaptive evolution to zinc tolerance in Arabidopsis halleri

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Shahzad, Zaigham, Gosti, Françoise, Frérot, Hélène, Lacombe, Eric, Roosens, Nancy, Saumitou-Laprade, Pierre, Berthomieu, Pierre·2010·PLoS Genetics

Abstract

Gene duplication is a major mechanism facilitating adaptation to changing environments. From recent genomic analyses, the acquisition of zinc hypertolerance and hyperaccumulation characters discriminating Arabidopsis halleri from its zinc sensitive/non-accumulator closest relatives Arabidopsis lyrata and Arabidopsis thaliana was proposed to rely on duplication of genes controlling zinc transport or zinc tolerance. Metal Tolerance Protein 1 (MTP1) is one of these genes. It encodes a Zn(2+)/H(+) antiporter involved in cytoplasmic zinc detoxification and thus in zinc tolerance. MTP1 was proposed to be triplicated in A. halleri, while it is present in single copy in A. thaliana and A. lyrata. Two of the three AhMTP1 paralogues were shown to co-segregate with zinc tolerance in a BC1 progeny from a cross between A. halleri and A. lyrata. In this work, the MTP1 family was characterized at both the genomic and functional levels in A. halleri. Five MTP1 paralogues were found to be present in A. halleri, AhMTP1-A1, -A2, -B, -C, and -D. Interestingly, one of the two newly identified AhMTP1 paralogues was not fixed at least in one A. halleri population. All MTP1s were expressed, but transcript accumulation of the paralogues co-segregating with zinc tolerance in the A. halleri X A. lyrata BC1 progeny was markedly higher than that of the other paralogues. All MTP1s displayed the ability to functionally complement a Saccharomyces cerevisiae zinc hypersensitive mutant. However, the paralogue showing the least complementation of the yeast mutant phenotype was one of the paralogues co-segregating with zinc tolerance. From our results, the hypothesis that pentaplication of MTP1 could be a major basis of the zinc tolerance character in A. halleri is strongly counter-balanced by the fact that members of the MTP1 family are likely to experience different evolutionary fates, some of which not concurring to increase zinc tolerance.

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  • Comparative expression analysis reported that later genomic evolution was displayed by the enhanced copy number of transporters such as HMA4 to 3 and MTP1 to 5 in Arabidopsis halleri compared to single-copy found in wild-type A. thaliana.

    “A comparative expression analysis reported that later genomic evolution was displayed by the enhanced copy number of transporters such as; HMA4 to 3 and MTP1 to 5 in Arabidopsis halleri compared to single-copy found in wild-type A. thaliana (Hanikenne et al., 2008; Shahzad et al., 2010).”

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Authors
Shahzad, Z., Gosti, F., Frérot, H., Lacombe, E., Roosens, N., Saumitou-Laprade, P., & Berthomieu, P.
Affiliations
Centre National de la Recherche Scientifique (FR)
Corresponding author
Berthomieu, Pierre
Venue
PLoS Genetics
Published
2010-04-15
Volume
6
Issue
4
Pages
e1000911
ISSN
  • 1553-7390 (ISSN-L)
  • 1553-7404
OpenAlex
W2000981840
Cited by
124
References
34
Citations by year
2026: 2 · 2025: 4 · 2024: 6 · 2023: 4 · 2022: 2 · 2021: 11 · 2020: 19 · 2019: 5 · 2018: 4 · 2017: 8 · 2016: 10 · 2015: 8 · 2014: 8 · 2013: 13 · 2012: 7
FWCI
12.67
Type
journal article
Language
en
Open access
Locations
  • PLoS Genetics (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
  • HAL (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
  • Higher Education Commission, Pakistan
  • Centre National de la Recherche Scientifique
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Micronutrient Interactions and Effects
  • Health Sciences › Nursing › Nutrition and Dietetics › Trace Elements in Health
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
Keywords
Arabidopsis halleri, zinc tolerance, zinc hyperaccumulation, zinc transporters, gene duplication, paralogs, adaptive evolution, zinc detoxification, functional complementation, Arabidopsis lyrata, Arabidopsis thaliana
MeSH terms
Carrier Proteins, Genetics, Population, Phylogeny, Linkage Disequilibrium, Gene Expression Regulation, Plant, Genome, Plant, Evolution, Molecular, Cation Transport Proteins, Arabidopsis Proteins

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