Abstract
Tropospheric ozone (O3) is a widespread secondary photochemical air pollutant, which occurs naturally at ground level in low concentration and is regarded the most damaging air toxicant. Current study was conducted to evaluate the potential of ethylenediurea (EDU) on the growth and physiochemical attributes of pea cultivar exposed to ambient O3 stress. Ozone stress reduced growth and biomass production of Pisum sativum. Application of EDU concentration of 450 ppm via soil drenching significantly enhanced growth and biomass of P. sativum. Application of EDU escalated relative water content and ascorbic acid content in P. sativum seedlings ultimately showing a significant increment in air pollution tolerance index up to 38.6% with EDU-450 treatment making the seedling more tolerant to the air pollution. The increasing concentrations of EDU showed significant increase in total soluble sugar, protein and proline contents, while phenolic contents were significantly decreased up to 36.6% with 450 ppm treatment of EDU. Furthermore, EDU treatment enhanced the activity of superoxide dismutase and ascorbate peroxidase. Current research reveals that EDU ameliorates the deleterious O3 effects on P. sativum and it can be used as an effective tool to enhance crop productivity at elevated levels of O3 concentration.
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