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ROLE OF ETHYLENE DIUREA IN ASSESSING IMPACT OF OZONE ON VIGNA RADIATA L. PLANTS GROWN IN A SUBURBAN AREA OF ALLAHABAD, INDIA
S. B. Agrawal Lab of Air Pollution and Global Climatic Change, Department of Botany, Banaras Hindu University, India

ABSTRACT

Field experiment was conducted to assess the suitability of ethylene diurea (N-[2-(2-oxo-1-imidazolidinyl) ethyl]- N’ phenylurea; EDU) application as soil drench for assessing the effects of O3 on mungbean plants (Vigna radiata L. var. Malviya Jyoti) grown under field conditions in suburban area of Allahabad city situated in a dry tropical region of India. EDU is a synthetic chemical known to have anti-ozonant property. Monthly O3 concentration varied between 64 to 69 mg m-3 at the experimental site during the growth period of mung bean plants. The growth and yield were significantly lower in plants growing in ambient air without EDU-treatment as compared to those treated with EDU. Significant favourable effects of EDU-application were also observed on various biochemical parameters viz., photosynthetic pigments, soluble protein, ascorbic acid and phenol contents. EDU-treated plants maintained higher levels of pigments, protein and ascorbic acid in foliage as compared to non-EDU-treated plants. The study clearly showed that EDU alleviates the phytotoxic effects of O3 in mung bean plants, and therefore can be used as a tool to assess the growth and yield losses in areas having higher levels of O3.

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