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A Medicago truncatula EF-Hand Family Gene, MtCaMP1, Is Involved in Drought and Salt Stress Tolerance
- Source :
- PLoS ONE, PLoS ONE, Vol 8, Iss 4, p e58952 (2013)
- Publication Year :
- 2013
- Publisher :
- Public Library of Science, 2013.
-
Abstract
- BACKGROUND: Calcium-binding proteins that contain EF-hand motifs have been reported to play important roles in transduction of signals associated with biotic and abiotic stresses. To functionally characterize genes of EF-hand family in response to abiotic stress, an MtCaMP1 gene belonging to EF-hand family from legume model plant Medicago truncatula was isolated and its function in response to drought and salt stress was investigated by expressing MtCaMP1 in Arabidopsis. METHODOLOGY/PRINCIPAL FINDINGS: Transgenic Arabidopsis seedlings expressing MtCaMP1 exhibited higher survival rate than wild-type seedlings under drought and salt stress, suggesting that expression of MtCaMP1 confers tolerance of Arabidopsis to drought and salt stress. The transgenic plants accumulated greater amounts of Pro due to up-regulation of P5CS1 and down-regulation of ProDH than wild-type plants under drought stress. There was a less accumulation of Na(+) in the transgenic plants than in WT plants due to reduced up-regulation of AtHKT1 and enhanced regulation of AtNHX1 in the transgenic plants compared to WT plants under salt stress. There was a reduced accumulation of H2O2 and malondialdehyde in the transgenic plants than in WT plants under both drought and salt stress. CONCLUSIONS/SIGNIFICANCE: The expression of MtCaMP1 in Arabidopsis enhanced tolerance of the transgenic plants to drought and salt stress by effective osmo-regulation due to greater accumulation of Pro and by minimizing toxic Na(+) accumulation, respectively. The enhanced accumulation of Pro and reduced accumulation of Na(+) under drought and salt stress would protect plants from water default and Na(+) toxicity, and alleviate the associated oxidative stress. These findings demonstrate that MtCaMP1 encodes a stress-responsive EF-hand protein that plays a regulatory role in response of plants to drought and salt stress.
- Subjects :
- Arabidopsis
lcsh:Medicine
Genetically modified crops
Plant Science
Plant Genetics
Malondialdehyde
Molecular Cell Biology
lcsh:Science
Plant Proteins
Abiotic component
Plant Growth and Development
Multidisciplinary
Ecology
EF hand
food and beverages
Signaling in Selected Disciplines
Plants, Genetically Modified
Medicago truncatula
Signaling Cascades
Droughts
Research Article
Biotechnology
Signal Transduction
Osmotic shock
Proline
Arabidopsis Thaliana
Molecular Sequence Data
Biology
Stress Signaling Cascade
Model Organisms
Plant and Algal Models
Plant Signaling
Stress, Physiological
Plant-Environment Interactions
Botany
Genetics
Amino Acid Sequence
EF Hand Motifs
Gene
Transgenic Plants
Abiotic stress
Plant Ecology
lcsh:R
fungi
Sodium
Hydrogen Peroxide
biology.organism_classification
lcsh:Q
Plant Biotechnology
Salts
Developmental Biology
Subjects
Details
- Language :
- English
- ISSN :
- 19326203
- Volume :
- 8
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- PLoS ONE
- Accession number :
- edsair.doi.dedup.....0b70e07a99c500309087111ff47f4e78