Effect of Elevated Ozone on Plant Nutrients, Chlorophyll Content and Antioxidant Enzymes in Cauliflower (Brassica oleracea var. botrytis L.)

Abstract

An experiment was conducted at woodhouse farm, Horticultural Research Station, Ooty, in the period of October 2017 to March 2018, to quantify the impact of tropospheric ozone and ozone protectants spray on chlorophyll content and antioxidant enzyme levels of cauliflower crop in a factorial completely randomized block design replicated thrice. During the study period, the plant exposed to ambient ozone level + 3% Panchagavya foliar spray had higher chlorophyll ‘a’, chlorophyll ‘b’ and total chlorophyll. The ambient ozone level + 3% Neem oil foliar spray had significantly higher total nitrogen, total phosphorous, total potassium. The elevated ozone exposure at 200 ppb significantly reduced the, total nitrogen, total phosphorous, total potassium, Chlorophyll ‘a’, Chlorophyll ‘b’, total chlorophyll and increased catalase and peroxidase enzyme activities in cauliflower plant. It is concluded that the tropospheric ozone had detrimental effect on chlorophyll contents and anti-oxidant enzymes in cauliflower crop. Further, the ozone protectants played a major role to nullify the tropospheric ozone effect on growth, physiology, development and yield of cauliflower and among the protectents, panchagavya performed well followed by neem oil and ascorbic acid.

DOI

https://doi.org/10.29321/MAJ.2018.000132

Pages

220 - 224

Creative Commons

Copyright

© The Author(s), 2026. Published by Madras Agricultural Students' Union in Madras Agricultural Journal (MAJ). This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited by the user.

Keywords