Journal of Food, Agriculture and Environment

Modulation of micronutrients and antioxidants defenses in Conocarpus lancifolius under abiotic stress

Author(s):

Amina Redha, Redha Al-Hasan, Mohammad Afzal *

Recieved Date: 2014-05-22, Accepted Date: 2014-09-19

Abstract:

Plant adaptation, in response to biotic/abiotic stress, may take place by adjusting nutrient requirements, metabolic enzymes, cellular membrane composition or an increase/decrease of metabolites such as amino acids, carbohydrates, lipids etc. The present study focused on the adjustment of antioxidant defenses in Conocarpus lancifolius, subjected to four abiotic oxidative stresses including temperature shock, salinity, water deficit and polyethylene glycol - 800. C. lancifolius exposure to elevated temperature at 40°C significantly increased the antioxidant defenses while the plant resistance to oxidative stress decreased by other abiotic stressors. This was confirmed by measuring the antioxidant capacity of C. lancifolius by employing four different assays with two distinctive mechanisms. These assays confirmed that C. lancifolius developed thermo tolerance on exposure to increased temperature by generating antioxidant defenses against free radicals. This may be an important factor that contributes to adaptation of C. lancifolius to harsh desert environment. In addition, C. lancifolius showed high accumulation of potassium and boron ions to keep its osmotic balance that could help it survive under severe abiotic stress.

Keywords:

Abiotic stress, Conocarpus lancifolius, heat-shock, oxidative stress

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Journal: Journal of Food, Agriculture and Environment
Year: 2014
Volume: 12
Issue: 3&4
Category: Environment
Pages: 312-319

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