Submit Manuscript

International Journal of Botany

Year: 2006 | Volume: 2 | Issue: 4 | Page No.: 372-379
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

Article Trend

Total views 214

Authors

M.A. El-tayeb

A.E. El-Enany

N.l. Ahmed

Keywords

Research Article

Salicylic Acid-induced Adaptive Response to Copper Stress in Sunflower (Helianthus annuus L.)

M.A. El-tayeb, A.E. El-Enany and N.l. Ahmed
The ameliorative effect of salicylic acid (SA: 0.5 mM) under Cu stress (5 mg L–1) in sunflower (Helianthus annuus L.) was studied. Excess Cu reduced the fresh and dry weights of different organs (roots, stems and leaves) and photosynthetic pigments (chlorophyll a, b and carotenoids) in four-week-old plants. There was a considerable increase in Chl a/b ratio and lipid peroxidation in both the roots and leaves of plants under excess Cu. Soluble sugars and free amino acids in the roots also decreased under Cu stress. However, soluble sugars in the leaves, free amino acids in the stems and leaves and proline content in all the plant organs increased in response to Cu toxicity. Salicylic Acid (SA) significantly reduced the chlorophyll a/b ratio and the level of lipid peroxidation in Cu-stressed plants. Under excess Cu, a higher accumulation of soluble sugars, soluble proteins and free amino acids including proline occurred in plants treated with SA. Exogenous application of SA appeared to induce an adaptive response to Cu toxicity including the accumulation of organic solutes leading to protective reactions to the photosynthetic pigments and a reduction in membranes damage in sunflower.
PDF Fulltext XML References Citation

Related Articles

Efficiency of Essential Oils, Citric Acid, Malic Aid and Nickel Reduced Ethylene Production and Extended Vase Life of Cut Lisianthus Flowers
Effect of Cobalt, Acetylsalicylic Acid and Glutamine to Extend the Vase-life of Carnation (Dianthus caryophyllus L.) Flowers
Effect of Salicylic Acid, Malic Acid, Citric Acid and Sucrose on Antioxidant Activity, Membrane Stability and ACC-oxidase Activity in Relation to Vase Life of Carnation Cut Flowers
Effect of Cobalt, Silicon, Acetylsalicylic Acid and Sucrose as Novel Agents to Improve Vase-life of Argyranthemum Flowers
Response of Vase-life Carnation Cut Flower to Salicylic Acid, Silver Nanoparticles, Glutamine and Essential Oil

Leave a Comment

Your email address will not be published. Required fields are marked *