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Effect of 28-homobrassinolide on antioxidant capacity and photosynthesis in Brassica juncea plants exposed to different levels of copper
- Source :
- Environmental and Experimental Botany. 66:418-424
- Publication Year :
- 2009
- Publisher :
- Elsevier BV, 2009.
-
Abstract
- A sand culture experiment was conducted to study ameliorative role of 28-homobrassinolide (HBL) in Brassica juncea seedlings raised from the seeds treated with water, or 10 −10 , 10 −8 and 10 −6 M 28-homobrassinolide (HBL) and grown in the presence of copper (50, 100 and 150 mg kg −1 sand) and sampled at 30 days after sowing. The plants grown in the presence of copper exhibited a significant decline in growth, chlorophyll and photosynthetic parameters. However, the activity of antioxidant enzymes: catalase (E.C. 1.11.1.6), peroxidase (E.C. 1.11.1.7) and superoxide dismutase (E.C. 1.15.1.1) and the content of proline increased in the plants grown under copper stress and/or raised from treatment with HBL. However, H 2 O 2 content increased significantly in copper-treated plants and decreased in plants given HBL treatment. Treatment of seeds with HBL improved the growth, photosynthetic parameters and antioxidant enzymes and also improved in the plants grown under copper stress. The elevated antioxidant enzyme and proline might be responsible to overcome the toxic effects of copper in B. juncea .
- Subjects :
- Antioxidant
biology
medicine.medical_treatment
Brassica
food and beverages
Plant Science
biology.organism_classification
Nitrate reductase
Photosynthesis
Superoxide dismutase
chemistry.chemical_compound
Horticulture
chemistry
Catalase
Chlorophyll
Botany
biology.protein
medicine
Proline
Agronomy and Crop Science
Ecology, Evolution, Behavior and Systematics
Subjects
Details
- ISSN :
- 00988472
- Volume :
- 66
- Database :
- OpenAIRE
- Journal :
- Environmental and Experimental Botany
- Accession number :
- edsair.doi...........7da1ee5af299ce827f96bd4cd1375bf9