ArticleMolecular biology reports2014
Differential responses of three sweetpotato metallothionein genes to abiotic stress and heavy metals.
Article in Molecular biology reports, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed, 35 citations in OpenAlex.
- Characterization of the Metallothionein Gene Family inAntioxidants (Basel, Switzerland) · 2023Article
- Where the wild things are: genetic associations of environmental adaptation in the Oryza rufipogon species complex.G3 (Bethesda, Md.) · 2023Article
- Genome-Wide Identification and Analysis of the Metallothionein Genes inInternational journal of molecular sciences · 2021Article
- Article
- Identification of the metallothionein gene family from cucumber and functional characterization of3 Biotech · 2019Article
- Integrated bioinformatics analysis of As, Au, Cd, Pb and Cu heavy metal responsive marker genes throughPeerJ · 2019Article
- Remediation mechanisms of mercapto-grafted palygorskite for cadmium pollutant in paddy soil.Environmental science and pollution research international · 2017Article
- The Accumulation of miRNAs Differentially Modulated by Drought Stress Is Affected by Grafting in Grapevine.Plant physiology · 2017Article
- IbOr Regulates Photosynthesis under Heat Stress by Stabilizing IbPsbP in Sweetpotato.Frontiers in plant science · 2017Article
- Improvement for agronomically important traits by gene engineering in sweetpotato.Breeding science · 2017Review
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Metallothioneins (MTs) are cysteine-rich, low molecular weight, metal-binding proteins that are widely distributed in living organisms. Plants produce metal-chelating proteins such as MTs to overcome the toxic effects of heavy metals. We cloned three MT genes from sweetpotato leaves [Ipomoea batatas (L.) Lam.]. The three IbMT genes were classified according to their cysteine residue alignment into type 1 (IbMT1), type 2 (IbMT2), and type 3 (IbMT3). IbMT1 was the most abundantly transcribed MT. It was predominantly expressed in leaves, roots, and callus. IbMT2 transcript was detected only in stems and fibrous roots, whereas IbMT3 was strongly expressed in leaves and stems. The IbMT expression profiles were investigated in plants exposed to heavy metals and abiotic stresses. The levels of IbMT1 expression were strongly elevated in response to Cd and Fe, and moderately higher in response to Cu. The IbMT3 expression pattern in response to heavy metals was similar to that of IbMT1. Exposure to abiotic stresses such as methyl viologen (MV; paraquat), NaCl, polyethylene glycol (PEG), and H2O2 up-regulated IbMT expression; IbMT1 responded strongly to MV and NaCl, whereas IbMT3 was induced by low temperature and PEG. Transgenic Escherichia coli overexpressing IbMT1 protein exhibited results suggest that IbMT could be a useful tool for engineering plants with enhanced tolerance to environmental stresses and heavy metals.
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