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KMID : 0368420000430020069
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Journal of Plant Biology
2000 Volume.43 No. 2 p.69 ~ p.75
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Growth Responses and Hyoscyamine Content of Datura innoxia under the Influence of Coal-Smoke Pollution
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Singh, Nandita
Ali, Gayoor/Soh, Woong-Young/Iqubal, Muhammad
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Abstract
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This study evaluated the impact of pollution on growth responses in Datura innoxia. Coal-smoke emissions were produced by the Badarpur Thermal Power Plant in Delhi, India. At the polluted site, the size of roots and leaves as well as the number of branches and leaves per plant increased, but shoot lengths and leaf areas were lower, compared with control plants. The net photosynthesis rate, stomatal resistance, and the amount of pigments (chlorophyll a, b, and carotenoids) were less in pollution-affected plants, while stomatal conductance and intercellular CO_2 concentration were higher in these plants. Explants from both sites (polluted and non-polluted), grown in vitro on various combinations of auxin (2,4-D, NAA) and cytokinin (BAP, KM), showed the maximum response on a medium containing NAA (0.1㎎ L^-1) with BAP (5.0㎎ L^-1). Hyoscyamine content was higher in all parts (root, stem, leaf, and regenerants) of the polluted plants.
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