• BaisakhiMajumder
• Ashutosh K.Pandey
• Elina Oksanen
• Tapan K. Nailwal
• Vivek Pandey

Tropospheric ozone (O3) is one of the most damaging air pollutants negatively affecting trees and crops in terms of growth and yield. But there is sparse information on O3 effects on ornamental plants. In the present study we used an antiozonant ethylenediurea (EDU) to examine the impact of ambient O3 on ornamental cultivars of Gladiolus named Vedio and Tigerflame. The cultivars were planted under natural field condition and treated with foliar EDU spray (200 and 400 ppm) at 7 days interval. The plant sampling was done at vegetative and flowering stage. During the study period, average O3 concentration was 60 ppb. The results showed that both EDU treated cultivars showed enhanced levels of chlorophyll, GSH, GR and CAT, especially at flowering phase. Lipid peroxidation level was significantly reduced in EDU treated plants. There were no changes in stomatal conductance and photosynthesis. Vase life of the florets was increased in comparison to non-EDU treated plants. This study showed that high ambient O3 is responsible for the damage of this economically important ornamental crop and that more Gladiolus varieties need to be tested against high O3 stress.

Antioxidant, EDU, Gladiolus, Ozone, Vase life

"Evaluation of impact of tropospheric ozone on Gladiolus cultivars using ethylenediurea", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 7, page no.31-41, July-2018, Available :http://www.jetir.org/papers/JETIR1807155.pdf

"Evaluation of impact of tropospheric ozone on Gladiolus cultivars using ethylenediurea", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 7, page no. pp31-41, July-2018, Available at : http://www.jetir.org/papers/JETIR1807155.pdf