Downy Mildew Disease of Pearl Millet and Its Control

Prakash, H. S.; Nayaka, Chandra S.; Kini, K. Ramachandra

doi:10.1007/978-1-4939-1188-2_4

Cited by 4 publications

(1 citation statement)

References 58 publications

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“…The annual grain yield loss due to DM is estimated to 20–40%, however, the losses are much higher under unfavorable conditions of high relative humidity, moderate temperature, and extensive use of the same cultivar 7 , 8 . DM disease has been managed conventionally by seed priming with fungicide Apron 35 SD and foliar spray with Ridomil MZ 9 .…”

Section: Introductionmentioning

confidence: 99%

Trichovariability in rhizosphere soil samples and their biocontrol potential against downy mildew pathogen in pearl millet

Nandini

Hariprasad

Saini

et al. 2021

Sci Rep

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The present work is aimed to examine the genetic variability and the distribution pattern of beneficial Trichoderma spp. isolated from rhizosphere samples and their mode of action in improving the plant health. A total of 131 suspected fungi were isolated from the rhizospheric soil and 91 isolates were confirmed as Trichoderma spp. T. asperellum and T. harzianum were found high in the frequency of occurrence. Genetic diversity analysis using RAPD and ISSR revealed the diverse distribution pattern of Trichoderma spp. indicating their capability to adapt to broad agroclimatic conditions. Analysis of genetic diversity using molecular markers revealed intra-species diversity of isolated Trichoderma spp. The frequency of pearl millet (PM) root colonization by Trichoderma spp. was found to be 100%. However, they showed varied results for indole acetic acid, siderophore, phosphate solubilization, β-1,3-glucanase, chitinase, cellulase, lipase, and protease activity. Downy mildew disease protection studies revealed a strong involvement of Trichoderma spp. in direct suppression of the pathogen (mean 37.41) in the rhizosphere followed by inducing systemic resistance. Our findings highlights the probable distribution and diversity profile of Trichoderma spp. as well as narrate the possible utilization of Trichoderma spp. as microbial fungicides in PM cultivation across different agroclimatic zones of India.

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Section: Introductionmentioning

confidence: 99%

Trichovariability in rhizosphere soil samples and their biocontrol potential against downy mildew pathogen in pearl millet

Nandini

Hariprasad

Saini

et al. 2021

Sci Rep

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The Major Diseases of Pearl Millet in the Indian Sub-continent: Current Scenarios in Resistance and Management Strategies

Bansal,

Balamurugan,

Mallikarjuna

et al. 2024

Pearl Millet in the 21st Century

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Lipopolysaccharide-induced priming enhances NO-mediated activation of defense responses in pearl millet challenged with Sclerospora graminicola

et al. 2018

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Lipopolysaccharide (LPS) elicitors isolated from Pseudomonas fluorescens UOM SAR 14 effectively induced systemic and durable resistance against pearl millet downy mildew disease caused by the oomycete Sclerospora graminicola. Rapid and increased callose deposition and H 2 O 2 accumulation were evidenced in downy mildew susceptible seeds pre-treated with LPS (SLPS) in comparison with the control seedlings, which also correlated with expression of various other defense responses. Biochemical analysis of enzymes and quantitative real-time polymerase chain reaction data suggested that LPS protects pearl millet against downy mildew through the activation of plant defense mechanisms such as generation of nitric oxide (NO), increased expression, and activities of defense enzymes and proteins. Elevation of NO concentrations was shown to be essential for LPS-mediated defense manifestation in pearl millet and had an impact on the other downstream defense responses like enhanced activation of enzymes and pathogen-related (PR) proteins. Temporal expression analysis of defense enzymes and PR-proteins in SLPS seedlings challenged with the downy mildew pathogen revealed that the activity and expression of peroxidase, phenylalanine ammonia lyase, and the PR-proteins (PR-1 and PR-5) were significantly enhanced compared to untreated control. Higher gene expression and protein activities of hydroxyproline-rich glycoproteins (HRGPs) were observed in SLPS seedlings which were similar to that of the resistant check. Collectively, our results suggest that, in pearl millet-downy mildew interaction, LPS pre-treatment affects defense signaling through the central regulator NO which triggers the activities of PAL, POX, PR-1, PR-5, and HRGPs.

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Downy Mildew Disease of Pearl Millet and Its Control

Cited by 4 publications

References 58 publications

Trichovariability in rhizosphere soil samples and their biocontrol potential against downy mildew pathogen in pearl millet

Trichovariability in rhizosphere soil samples and their biocontrol potential against downy mildew pathogen in pearl millet

The Major Diseases of Pearl Millet in the Indian Sub-continent: Current Scenarios in Resistance and Management Strategies

Lipopolysaccharide-induced priming enhances NO-mediated activation of defense responses in pearl millet challenged with Sclerospora graminicola

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