Growth Responses of Phaseolus aureus Plants to Petro-coke Pollution

Green-gram (Phaseolus aureus) plants were treated with petro-coke dust, a paniculate pollutant of petroleum refineries, at the rate of 2 g petro-coke m−2 d−1 for 40 consecutive days between 26 and 65 d of plant age. Plant samples collected from control and dusted plots were analysed with respect to...

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Bibliographic Details
Published in:Journal of experimental botany 1981-12, Vol.32 (6), p.1343-1350
Main Authors: PRASAD, B. J., RAO, D. N.
Format: Article
Language:English
Subjects:
Chlorophylls
Leaves
Particulate pollution
Pigments
Plant roots
Plants
Pollution control
Soil pollution
Sulfur
Transpiration
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Summary:Green-gram (Phaseolus aureus) plants were treated with petro-coke dust, a paniculate pollutant of petroleum refineries, at the rate of 2 g petro-coke m−2 d−1 for 40 consecutive days between 26 and 65 d of plant age. Plant samples collected from control and dusted plots were analysed with respect to transpiration rate, mineral accumulation, and contents of ascorbic acid, protein, carbohydrate, and pigments. Morphological parameters, phytomass accumulation, net primary productivity, and calorific values were also determined. On petro-coke treatment, transpiration rates increased at first but were lower in the 65 d old plants than in control plants. Accumulation of N, P, S, K, and Ca was less in treated plants than in the control plants at all ages. Ascorbic acid, protein, and carbohydrate contents were reduced in treated plants. Total chlorophyll initially increased in treated plants but later on decreased at higher cumulative doses of petro-coke. Root and shoot lengths, number of leaves, nodules, flowers, and pods were reduced in petro-coke-treated plants.
ISSN:0022-0957
1460-2431
DOI:10.1093/jxb/32.6.1343