International journal of molecular sciences, 2014-06, Vol.15 (6), p.10398-10409
2014
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- Autor(en) / Beteiligte
- Titel
- The metallothionein gene, TaMT3, from Tamarix androssowii confers Cd2+ tolerance in tobacco
- Ist Teil von
- International journal of molecular sciences, 2014-06, Vol.15 (6), p.10398-10409
- Ort / Verlag
- Switzerland: MDPI AG
- Erscheinungsjahr
- 2014
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- Cadmium (Cd) is a nonessential microelement and low concentration Cd2+ has strong toxicity to plant growth. Plant metallothioneins, a class of low molecular, cystein(Cys)-rich and heavy-metal binding proteins, play an important role in both metal chaperoning and scavenging of reactive oxygen species (ROS) with their large number of cysteine residues and therefore, protect plants from oxidative damage. In this study, a metallothionein gene, TaMT3, isolated from Tamarix androssowii was transformed into tobacco (Nicotiana tobacum) through Agrobacterium-mediated leaf disc method, and correctly expressed under the control of 35S promoter. Under Cd2+ stress, the transgenic tobacco showed significant increases of superoxide dismutase (SOD) activity and chlorophyll concentration, but decreases of peroxidase (POD) activity and malondialdehyde (MDA) accumulation when compared to the non-transgenic tobacco. Vigorous growth of transgenic tobacco was observed at the early development stages, resulting in plant height and fresh weight were significantly larger than those of the non-transgenic tobacco under Cd2+ stress. These results demonstrated that the expression of the exogenous TaMT3 gene increased the ability of ROS cleaning-up, indicating a stronger tolerance to Cd2+ stress.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 1422-0067, 1661-6596eISSN: 1422-0067DOI: 10.3390/ijms150610398Titel-ID: cdi_doaj_primary_oai_doaj_org_article_8d91e8ab886a4a65910112bafc2134b0
- Format
- –
- Schlagworte
- Abiotic stress, Agrobacterium - genetics, Amino Acid Sequence, Base Sequence, Cadmium, Cadmium - toxicity, Chlorophyll - metabolism, genetic transformation, Genetics, Malondialdehyde - metabolism, metallothionein, Metallothionein - genetics, Metallothionein - metabolism, Molecular Sequence Data, Nicotiana - drug effects, Nicotiana - growth & development, Nicotiana - metabolism, Peroxidases - metabolism, Plant Leaves - metabolism, Plant Proteins - genetics, Plant Proteins - metabolism, Plant tolerance, Plants, Genetically Modified - drug effects, Plants, Genetically Modified - growth & development, Plants, Genetically Modified - metabolism, Reactive Oxygen Species - metabolism, Superoxide Dismutase - metabolism, Tamaricaceae - metabolism, Tamarix androssowii, Tobacco, Transgenic plants