Constitutive expression of mustard annexin, AnnBj1 enhances abiotic stress tolerance and fiber quality in cotton under stress
| Autor: | S. K. Jami, Kesanakurti Divya, Pulugurtha Bharadwaja Kirti |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Chlorophyll
Annexins Sodium Molecular Sequence Data chemistry.chemical_element Plant Science Sodium Chloride Thiobarbituric Acid Reactive Substances chemistry.chemical_compound Gene Expression Regulation Plant Genetics medicine Mannitol Amino Acid Sequence Cotton Fiber Hydrogen peroxide Phylogeny Peroxidase Plant Proteins Gossypium biology Sequence Homology Amino Acid Abiotic stress Reverse Transcriptase Polymerase Chain Reaction General Medicine Hydrogen Peroxide Plants Genetically Modified Adaptation Physiological Plant Leaves chemistry Biochemistry Glucosyltransferases biology.protein Sucrose synthase Sucrose-phosphate synthase Osmoprotectant Agronomy and Crop Science medicine.drug Mustard Plant |
| Zdroj: | Plant molecular biology. 73(3) |
| ISSN: | 1573-5028 |
| Popis: | Annexins belong to a multigene family of Ca(2+) dependent, phospholipid and cytoskeleton binding proteins. They have been shown to be upregulated under various stress conditions. We generated transgenic cotton plants expressing mustard annexin (AnnBj1), which showed enhanced tolerance towards different abiotic stress treatments like sodium chloride, mannitol, polyethylene glycol and hydrogen peroxide. The tolerance to these treatments was associated with decreased hydrogen peroxide levels and enhanced total peroxidase activity, enhanced content of osmoprotectants- proline and sucrose in transgenic plants. They showed higher retention of total chlorophyll and reduced TBARS in leaf disc assays with stress treatments, and decreased hydrogen peroxide accumulation in the stomatal guard cells when compared to their wild type counterparts. They also showed significantly enhanced fresh weight, relative water content, dry weight under stress. Treatment with sodium chloride resulted in enhanced expression of genes for Delta-pyrroline-5-carboxylase synthetase in leaves, and sucrose phosphate synthase, sucrose synthase and cellulose synthase A in the leaves and fibers of transgenic plants. The transgenic plants maintained normal seed development, fiber quality and cellulose content under stress. |
| Databáze: | OpenAIRE |
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