Peer Reviewed Open Access

This paper is reviewed in accordance with the Peer Review Program of IRA Academico Research

Ambient and Elevated Ozone (O3) impacts on Potato Genotypes (Solanum tuberosum.L) over a high altitude Western Ghats location in Southern India

V.S. Suganthy, C. Udayasoorian
DOI: http://dx.doi.org/10.21013/jas.v4.n3.p16
Abstract

Globally, next to CO2 and Methane, raising levels of tropospheric ozone (O3), acts as a secondary pollutant and green house gas which is a silent threat as well as one of the biggest challenges for the decrease in agricultural production. The diurnal and seasonal variation characteristics of ambient ozone (O3) and its precursor NOx was investigated by their continuous measurements at ISRO-Climate Change Observatory situated in a high altitude Western Ghats location of Ooty. The impact of ambient  O3 on the growth and yield characteristics of various potato genotypes were assessed by the calculated higher ozone exposure indices AOT40 and SUM60 than critical levels by showing “latent injury“ in the form of  yield reduction (4.56 - 25.5 %) in potato genotypes. The impact of three elevated O3 levels (100, 150 and 200 ppb for 4 hd-1) on ten potato genotypes was done by fumigation under controlled open–top chamber during its critical stage namely the tuber initiation stage resulted that Kufri Surya proved to be moderately resistant by recording the highest yield.

Keywords
Tropospheric Ozone, Secondary Air Pollutant, Ozone exposure indices, Elevated ozone, Potato yield
Full Text:
PDF

©IRA Academico Research & its authors
This article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. This article can be used for non-commercial purposes. Mentioning of the publication source is mandatory while referring this article in any future works.