Abstract
A field study was conducted to evaluate the suitability of ethylene diurea ( N-[2-(2-oxo-1-imidazolidinyl)ethyl]- N′-phenylurea; EDU) in assessing the impact of O 3 on mung bean plants ( Vigna radiata L. var. Malviya Jyoti) grown in suburban area of Allahabad city situated in a dry tropical region of India. EDU is a synthetic chemical having anti-ozonant property. Mean monthly O 3 concentration varied between 64 and 69 μg m −3 during the experimental period. In comparison to EDU-treated plants, non-EDU-treated plants showed significant reductions in plant growth and yield under ambient conditions. Significant favourable effects of EDU-application were observed with respect to 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 ones. The study clearly demonstrated that EDU alleviates the unfavourable effects of O 3 on mung bean plants, and therefore can be used as a tool to assess the growth and yield losses in areas having higher O 3 concentrations.
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