Evaluating the Efficacy of Microbial Antagonists in Inducing Resistance, Promoting Growth, and Providing Biological Control Against Powdery Mildew in Wheat

Overview

Journal Front Microbiol

Specialty Microbiology

Date 2024 Aug 8

PMID 39113835

Authors

Kariyappa R Choudaker

Vaibhav Kumar Singh

Abhijeet Shankar Kashyap

Aakash V Patel

Koshal K Sameriya

Dhananjay Yadav

Nazia Manzar

Deeba Kamil

Lakshman Prasad

M S Saharan

Affiliations

Soon will be listed here.

Abstract

This study evaluates the biocontrol efficacy of three bacterial strains DTPF-3, DTBA-11, and DTBS-5) and two fungal strains ( Pusa-5SD and An-27) antagonists, along with their combinations at varying doses (5.0, 7.5, and 10.0 g/kg of seeds), against wheat powdery mildew. The most effective dose (10 g/kg seeds) was further analyzed for its impact on induced resistance and plant growth promotion under greenhouse conditions. The study measured defense enzyme activities, biochemical changes, and post-infection plant growth metrics. All tested microbial antagonists at 10 g/kg significantly reduced PM severity, with strain DTBS-5 outperforming others in reducing PM severity and achieving the highest biocontrol efficacy. It was followed by strain DTBA-11 and strain DTPF-3, with the fungal antagonists showing no significant effect. Wheat crops treated with strain DTBS-5 exhibited substantial increases in defense-related enzyme activities and biochemicals, suggesting an induced resistance mechanism. The study found a 45% increase in peroxidase (POD) activity, a 50% increase in catalase (CAT) activity, a 30% increase in phenolic content, and a 25% increase in soluble protein content in the wheat plants treated with microbial antagonists. The study highlights the effectiveness of microbial antagonists, particularly strain DTBS-5, in managing wheat PM through biocontrol, induced resistance, and enhanced plant growth, offering a sustainable alternative to chemical treatments.

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