Effect of ozone and antioxidants on wheat and its pathogen — Bipolaris sorokininana

Abstract

Tropospheric ozone (O 3 ) adversely affects growth and productivity of crops and also influences crop-pathogen interactions. Adverse effects of O 3 on crops can be mitigated by antioxidants application. In the present study through lab and field experiments impact of O 3 and antioxidants treatment to wheat was assessed on growth of Bipolaris sorokiniana (BS-75 strain) pathogen responsible for Spot blotch disease, pathogenesis related (PR) proteins and chitinase content. Results showed that growth of Bipolaris was significantly higher in elevated ozone (EO 3 ) exposed plants as compared to control plants. Antioxidants -ascorbic acid (AA), tagetes extract (T) and quercetin (Q) application on culture media and wheat plants, respectively, retarded the growth of Bipolaris sorokiniana. Among the three antioxidants minimum growth of Bipolaris was observed in AA-treated plants as compared to control plants. Reduction in chitinase activity and PR proteins content due to EO 3 treatment in wheat plants was 18% and 78%, respectively, as compared to control plants. Increase in chitinase activity and PR proteins content due to antioxidants treatment in wheat plants was 45% and 60%, respectively, as compared to control plants.

The Mitochondrial Genome of the Phytopathogenic Fungus Bipolaris sorokiniana and the Utility of Mitochondrial Genome to Infer Phylogeny of Dothideomycetes

“…ex Dastur] is a seed and soil borne pathogen, which causes spot blotch, root rot, leaf spot, seedling blight, head blight, and black point disease in cereal crops (Wiese, 1998;Kumar et al, 2002). Among these diseases, the leaf spot blotch is recognized as the major biotic stress hampering commercial production of wheat, because it results in significant yield losses (Chowdhury et al, 2013;Mina et al, 2016). The type strain was isolated from Russia with number of MBT197973 in 1890, which was originally named as Helminthosporium sorokinianum.…”

Effect of elevated ozone and carbon dioxide interaction on growth, yield, nutrient content and wilt disease severity in chickpea grown in Northern India

“…It is known that O 3 -induced metabolic changes can persist in plants over days or months ( Sandermann, 2000 ), however, it is difficult to predict the effects of climatic variables on disease susceptibility ( Eastburn et al., 2010 ). Under O 3 exposure both increase in disease susceptibility ( Mina et al., 2016 ; Sandermann, 2000 ) and decrease in disease susceptibility ( Coleman et al., 1988 ) have been reported.…”

Interrelation of the Criteria of Beer Wort Color Grade and Barley Grain Contamination Rate

“…Historically, bactericidal treatment at processing enterprises generally is carried out by chemical reagents [4]. For example, an antioxidant -ascorbic acid, which slows down the growth of grain pathogens, is used as a chemical reagent [5].…”