Biochemical parameters of plants as indicators of air pollution.
ABSTRACT In the present study species like Mangifera indica, Linn., Cassia fistula, Linn., and Eucalyptus hybrid were exposed to different air pollution load for short duration (active biomonitoring). Variation in biochemical parameters like chlorophyll, protein, soluble sugar free amino acid, ascorbic acid, nitrate reductase, superoxide dismutase and peroxidase in the leaves were found to be pollution load dependent. These variations can be used as indicators of air pollution for early diagnosis of stress or as a marker for physiological damage to trees prior to the onset of visible injury symptoms. Just by analyzing these biochemical indicators air quality can also be assessed.
Full-textDOI: · Available from: Mukesh Kumar Gautam, Jun 18, 2014
SourceAvailable from: Atefeh Dezhban
Dataset: Dezhban et al 2015(J. For. Res)
[Show abstract] [Hide abstract]
ABSTRACT: Heavy metal contamination is one of the most important abiotic stresses affecting physiological activities of plants. We investigated the effects of cadmium (Cd) and lead (Pb) on chlorophyll fluorescence (Fv/Fm, Fo, and Fm), photosynthetic pigments (chlorophyll a and b), and proline in one-year-old seedlings of Robinia pseudoacacia. The seedlings were treated twice over a period of 10 days with Cd and Pb at concentrations of 0, 250, 500, 1000 and 2000 mg L−1. Saline solution containing Cd and Pb was sprayed on the leaves. Chlorophyll and proline contents were measured after 10 days. Chlorophyll fluorescence of R. pseudoacacia was affected slightly by high concentrations (1000, 2000 mg L−1) of Cd and Pb. Chlorophyll a and a/b increased at 1000 and 2000 mg L−1 of Cd and proline content of leaves was similar in all treatments of Cd and Pb. Our results indicated that photosynthetic sensitivity of R. pseudoacacia to Cd and Pb contamination was weak. Photosystem II chlorophyll pigments were not damaged by Pb and Cd stress. We conclude that chlorophyll fluorescence along with chlorophyll and proline contents are useful indicators of Cd and Pb stresses in R. pseudoacacia which widely planted in urban polluted regions in Iran.Journal of Forestry Research 01/2015; DOI:10.1007/s11676-015-0045-9