Dravya—As an organic agent for the management of seed-borne fungi of sorghum and its role in the induction of defense enzymes

Raghavendra, Vinay B.; Lokesh, S.; Govindappa, M.; Vasanthkumar, Thriveni

doi:10.1016/j.pestbp.2007.06.004

Cited by 22 publications

(13 citation statements)

References 14 publications

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“…Increased activity of PPO, POX, PAL and TAL has been reported in plants treated with various biotic and abiotic inducers of resistance (Huang and Backhouse ; Raghvendra et al. ; Kumar et al. ).…”

Section: Discussionmentioning

confidence: 99%

“…The specific activity of POX was many folds higher than PPO and is in agreement with the investigation of Khan et al (2001) in the leaves of infected sorghum, and Kumar et al (2010) with Pearl millet. Increased activity of PPO, POX, PAL and TAL has been reported in plants treated with various biotic and abiotic inducers of resistance (Huang and Backhouse 2005;Raghvendra et al 2007;Kumar et al 2010). In the present investigation, PPO-and POX-specific activities were highest with the Cu 2+ 10 ppm treatment of inoculated seedlings to reflect Cu's function as a cofactor for these enzymes (Kalim 2003;Lambert et al 2005;Singh et al 2007;Dordas 2008;Klikocka 2009).…”

Section: Ivdmd (%)mentioning

confidence: 98%

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Copper and Manganese Increase Resistance of Clusterbean to Root Rot Caused by Rhizoctonia

Wadhwa

Joshi

Gandhi

2012

Journal of Phytopathology

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Clusterbean seedlings growing in soil inoculated with Rhizoctonia were treated with either 5 or 10 ppm Cu 2+ and Mn 2+ . Soil was inoculated by pretreatment with 250 mg (wet weight) of Rhizoctonia inoculum. A similar set of plants was maintained in uninoculated soil. Root rot incidence of plants treated with Cu 2+ 5 ppm, Cu 2+ 10 ppm, Mn 2+ 5 ppm and Mn 2+ 10 ppm was 26.6, 30.5, 11.8 and 29.2% less than the inoculated control, respectively. Inoculation with Rhizoctonia reduced chlorophyll, non-structural carbohydrate and in vitro dry matter digestibility (IVDMD) content compared with uninoculated ones. Oxidative enzymes activities (polyphenol oxidase, peroxidase, phenylalanine ammonia lyase and tyrosine ammonia lyase), crude protein, phenolic content, structural components (acid detergent fibre, cellulose and lignin), silica, macronutrients and micronutrients increased in inoculated seedlings and this increase was further heightened by the Cu 2+ 10 ppm treatment compared with the Cu 2+ 5 ppm, Mn 2+ 5 ppm and Mn 2+ 10 ppm treatments in response to fungal invasion. It was concluded that the Cu 2+ 10 ppm treatment may be an effective soil nutrient to provide enhanced resistance of clusterbean plants to root rot (fungal) diseases.

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Section: Discussionmentioning

confidence: 99%

Section: Ivdmd (%)mentioning

confidence: 98%

Copper and Manganese Increase Resistance of Clusterbean to Root Rot Caused by Rhizoctonia

Wadhwa

Joshi

Gandhi

2012

Journal of Phytopathology

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“…Defensive enzymes are among the most influential and widely distributed products in the plants. Peroxidase and polyphenol oxidase were reported in plants treated with various biotic and abiotic inducers (Raghvendra et al, 2007). The role of oxidative enzymes such as peroxidase and polyphenol oxidase could be explained as anoxidation process of phenol compounds to oxidized products which may limit the fungal growth (Nawar and Kuti, 2003).…”

Section: Rhizoctoniamentioning

confidence: 99%

Use of Organic Acids for Controlling Damping-off Caused by Rhizoctonia solani on Cotton

Osman¹,

Nahas²,

Youssef³

et al. 2019

Journal of Plant Protection and Pathology

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The four organic acids; Gallic acid (GA), Jasmonic acid (JA), Oxalic acid (OA) and Tannic acid (TA); (used in three concentrations for each acids) were evaluated in vitro and in vivo for suppression of Rhizoctonia solani caused damping-off on cotton. In vitro study showed that JA and OA were ineffective in inhibiting linear growth of the fungus, while GA and TA showed antifungal activities. In non-infested soil, none of the tested acids caused phytotoxicity under greenhouse conditions for seedlings of cotton cultivar Giza 95 when they were applied as soil drench. All the organic acids caused significant increases in plant height and dry weight of seedlings. In infested soil, GA was effective in controlling damping-off disease only at the low concentration (25.0 mM). All the applied concentrations of the other acids were effective in controlling the disease. Plant height and dry weight were not affected by any acid. The effects of organic acids on peroxidase, polyphenol oxidase, free phenolic compounds and total phenolic compounds were variable depending upon the applied concentration.

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“…They catalyse multiple reactions resulting in synthesis of reactive oxygen species, quinones and hydroperoxides in plant cells (Chen et al 2010;Newman et al 2011). The increased activities of these enzymes in response to pathogen inoculation have tremendous impact on host physiology and induce expression of several genes responsible for conferring resistance in host plant against pathogen (Huang and Backhouse, 2005;Raghvendra et al 2007). Native PAGE analyses of POX and PPO enzymes have shown an increase in number of their isoforms in response to inoculation of different inducers in pearl millets (Lavanya et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Effect of Klebsiella pneumoniae on speck disease development in Solanum lycopersicum

Gaur¹,

Sharma²,

Paul³

2017

IJARe

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Colonisation and infection of Pseudomonas syringae pv. tomato is governed not only by host resistance but also by its interactions with other phylloplane bacterial colonizers. In the present study, reduced disease symptoms were observed as a result of interaction between P. syringae pv. tomato and Klebsiella pneumoniae, a predominant human enteric pathogen colonising phyllosphere. Tomato (Solanum lycopersicum) plants raised under controlled aseptic conditions were divided into 4 groups of 25 plants each and treated as follows: Group 1-inoculated with P. syringae pv. tomato; Group 2-inoculated with K. pneumoniae; Group 3-combination of P. syringae pv. tomato and K. pneumoniae (1:1); Group 4-Distilled water (control). Sampled leaves from the above groups were analysed at 24, 48, 72 and 96 hours post inoculation for the activity of cytoplasmic Peroxidase (POX), Polyphenoloxidase (PPO) and Phenylalanine ammonia lyase (PAL). Disease incidence was recorded in treated as well as leaves emerging after 2 weeks of inoculation. Plants treated with P. syringae pv. tomato had maximum disease incidence while no infection was observed in control and those inoculated with K. pneumoniae alone. Inoculation of plants with combination of both microbes could substantially reduce the disease severity. The results thus demonstrate that K. pneumoniae, a common HEP on plant surfaces, reduces the ability of P. syringae pv. tomato to colonise the host.

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Dravya—As an organic agent for the management of seed-borne fungi of sorghum and its role in the induction of defense enzymes

Cited by 22 publications

References 14 publications

Copper and Manganese Increase Resistance of Clusterbean to Root Rot Caused by Rhizoctonia

Copper and Manganese Increase Resistance of Clusterbean to Root Rot Caused by Rhizoctonia

Use of Organic Acids for Controlling Damping-off Caused by Rhizoctonia solani on Cotton

Effect of Klebsiella pneumoniae on speck disease development in Solanum lycopersicum

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