Characterization of Acidovorax avenae subsp. avenae causing bacterial leaf streak of maize in Punjab state of India

Dhkal, Manmohan; Hunjan, Mandeep Singh; Kaur, Harleen; Pannu, P.P.S.

doi:10.1007/s42161-018-0138-3

Cited by 5 publications

(5 citation statements)

References 14 publications

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“…ciceri). Similarly, Dhkal et al (2016), where maximum PAL activity was observed in case of moderately resistant cultivar of maize against a isolate of Acidovorax avenae subsp. avenae as compared to highly susceptible cultivar.…”

Section: Resultsmentioning

confidence: 96%

“…2). Dhkal et al (2016) reported higher catalase activity in moderately resistant varieties of maize as compared to susceptible against bacterial leaf streak in maize.…”

Section: Resultsmentioning

confidence: 97%

“…After a pathogen invasion there is activation of variety of plant defense responses via signal transduction cascade activation, which involves oxidative burst, reinforcement of cell walls, hypersensitive response and production of phytoalexins (Balmer et al, 2013). Recently, Kumar (2015) and Dhkal et al (2016) have reported significant role of some antioxidants in imparting resistance in some lines of maize crop to a bacterial stalk rot (Dickeya zeae) and bacterial leaf streak pathogen respectively. However, there is no information available regarding the role of antioxidant enzymes in modulating resistance to downy mildew.…”

Section: Research Articlementioning

confidence: 99%

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Identification and Biochemical Characterization of Resistance against Downy Mildew in Snapmelon

Khanal¹,

Sekhon²,

Astha³

2017

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Snapmelon downy mildew, an important foliar disease caused by Pseudoperonospora cubensis is an obligate parasite, which can survive and reproduce on living host tissue, causing significant yield losses. Forty six accessions of snapmelon were screened against P. cubensis in the cropping season 2015 and 2016. Plants were inoculated at optimum level of sporangial suspension (4.0 × 10 4 sporangia per ml) to create downy mildew. Out of forty six accessions, three were resistant having incidence in the range of 20-30 per cent and rest were moderately resistant, moderately susceptible, susceptible and highly susceptible. Significant mean maximum disease severity was observed in snapmelon accession SM 2013-7 and minimum in accession MC 2013-4. For further confirmation, biochemical studies of various defense enzymes were carried out in resistant accessions and compared with susceptible. The data pertaining to the activity of peroxidase, catalase, phenylalanine ammonia lyase and total phenols revealed significant differences (p=0.05) among the different accessions of snapmelon showing different reactions against P. cubensis. Higher activity of all those antioxidant enzymes were observed in resistant, followed by moderately resistant whereas activity gradually declined among susceptible and highly susceptible accessions. Negative values of Pearson's correlation coefficient were obtained between antioxidant enzyme activity and disease development suggesting possible involvement of these enzymes in imparting resistance against downy mildew in snapmelon.

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Section: Resultsmentioning

confidence: 96%

“…2). Dhkal et al (2016) reported higher catalase activity in moderately resistant varieties of maize as compared to susceptible against bacterial leaf streak in maize.…”

Section: Resultsmentioning

confidence: 97%

Section: Research Articlementioning

confidence: 99%

See 1 more Smart Citation

Identification and Biochemical Characterization of Resistance against Downy Mildew in Snapmelon

Khanal¹,

Sekhon²,

Astha³

2017

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“…Diseases affecting sweet corn include stalk, root and corn ear rot; leaf spot and blight; wilting; and stunted growth (Gijon‐Hernandez et al., 2011). Common and important bacterial diseases of corn include brown stalk rot caused by Pantoea ananatis and P. agglomerans (Goszczynska et al., 2007), leaf stripe and stem rot caused by Burkholderia gladioli (Gijon‐Hernandez et al., 2011), whole rot caused by Serratia marcescens (Wang et al., 2015), leaf streak caused by Acidovorax avenae (Dhkal et al., 2019) and stalk rot caused by Dikeya zeae (Caplik et al., 2022).…”

Section: Figurementioning

confidence: 99%

“…Burkholderia gladioli (Gijon-Hernandez et al, 2011), whole rot caused by Serratia marcescens (Wang et al, 2015), leaf streak caused by Acidovorax avenae (Dhkal et al, 2019) and stalk rot caused by Dikeya zeae (Caplik et al, 2022).…”

mentioning

confidence: 99%

Characterization and identification of Burkholderia gladioli causing stalk rot of sweet corn in Thailand

Chiangkhaek,

Akarapisan

2024

Journal of Phytopathology

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Stalk rot disease is becoming an important disease in sweet corn crops because it causes significant yield losses of the crop. In July 2022, typical symptoms of stem rot were observed in fields of Mae Hia Agricultural Research, Demonstration and Training Center in Chiang Mai province of Thailand. The symptoms exhibited by affected crop included circular water‐soaked lesions, rot and necrotic tissue at the base of the stalk. Koch's postulates were fulfilled with reisolation of the inoculated strain from the inoculated tissues, and confirmation was obtained by phenotypic characters and 16S rRNA sequences. The isolated colony on nutrient agar was cream‐coloured, circular, with a convex elevation, entire margin and smooth surface; the optical character was translucent and exuded a yellowish pigment that diffused in the nutrient agar, gram‐negative, lacked arginine dihydrolase, occurrence of the oxidase and catalase reaction. The strains were able to utilize d‐galactose and glucose but were unable to utilize d‐maltose, d‐cellobiose, d‐fructose, d‐mannose, mannitol, lactose and sucrose. The strains showed positive results for gelatine liquefaction test, citrate utilization and casein hydrolysis, but starch hydrolysis and indole production were negative result. These characteristics are the same as those described previously for Burkholderia gladioli. Disease severity in sweet corn was 43.8%, with infections showing spots with dark margins and soft rot on mature leaves and flag leaves. Disease severity in waxy corn and maize were 21.9% and 15.6%, respectively, showing a few light or dark brown spots at the infection sites. Therefore, this represents the first report of leaf stripe and stalk rot disease in sweet corn in Thailand.

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Genetic diversity of Acidovorax oryzae in a single site in Mazandaran province, Iran

2021

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Characterization of Acidovorax avenae subsp. avenae causing bacterial leaf streak of maize in Punjab state of India

Cited by 5 publications

References 14 publications

Identification and Biochemical Characterization of Resistance against Downy Mildew in Snapmelon

Identification and Biochemical Characterization of Resistance against Downy Mildew in Snapmelon

Characterization and identification of Burkholderia gladioli causing stalk rot of sweet corn in Thailand

Genetic diversity of Acidovorax oryzae in a single site in Mazandaran province, Iran

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