Role of Sugars and Phenols in Charcoalrot Resistance of Sorghum

Patil, S. H.; Hedge, R. K.; Anahosur, K. H.

doi:10.1111/j.1439-0434.1985.tb00821.x

Cited by 11 publications

(5 citation statements)

References 6 publications

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“…The current findings of more total soluble sugar in resistant genotypes compared to susceptible genotypes agreed with Patil et al (1985) [41] , who reported that the decrease in sugar quantity in susceptible genotypes may be attributed to fungus utilisation for growth. Gopalakrishnan et al (2010) [16] observed that 28 percent reduction in the total sugar content of rice seeds due to Sarocladium oryzae infection in susceptible varieties whereas it was 17 percent in resistant varieties.…”

Section: Estimation Of Total and Reducing Sugarssupporting

confidence: 91%

Defense reaction and biochemical interpretation of rice genotypes to sheath blight, Rhizoctonia solani Kuhn

KS,

et al. 2024

Int. J. Adv. Biochem. Res.

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Rice (Oryza sativa L.) is one of the most important cereal crops in the world. Sheath blight disease of rice caused by Rhizoctonia solani Kuhn AG-1 IA (Telomorph, Thanatephorus cucumeris Frank. Donk) is a devastating disease in all rice-growing regions of the world. The yield losses ranging from 4-50% have been reported depending on the crop stage at the time of infection, the severity of the disease, and environmental conditions. Landraces are valuable genetic resources to explore novel genetic variations and they are highly adaptive. Considering the significance of this disease the present study was conducted at College of Agriculture, V.C. Farm, Mandya during Kharif 2021 and Summer 2022. Ninety landraces and ten popular varieties of rice were screened against sheath blight disease by artificial inoculation method. Disease scoring was done by the standard evaluation system (SES) as per IRRI (2002). The mean percent disease index (PDI) ranged from 11.11 to 79.56%. Based on AUDPC values, rice genotypes were categorized into 5 groups i.e., resistant, moderately resistant, moderately susceptible, susceptible, and highly susceptible. Further to know the resistance mechanism, 34 selected genotypes were analyzed for biochemical constituents by using standard procedure and protocols and it was found that phenol (-0.79), total soluble sugar (-0.84), reducing sugar (-0.87), crude protein (-0.84), tannin (-0.91), peroxidase (-0.67), polyphenol oxidase (-0.83), and phenylalanine ammonia lyase (-0.84) was negatively correlated with sheath blight disease severity and these biochemicals were higher in resistance genotypes viz., Kalanamak and Sidda sanna compare to susceptible genotypes.

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Section: Estimation Of Total and Reducing Sugarssupporting

confidence: 91%

Defense reaction and biochemical interpretation of rice genotypes to sheath blight, Rhizoctonia solani Kuhn

KS,

et al. 2024

Int. J. Adv. Biochem. Res.

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“…Like Fusarium spp., M. phaseolina has been categorized as a weak parasite and requires the senescence of plant cells resulting from stressful environmental conditions or the depletion of nutrients to parasitize the plant (Dhingra et al, 1976). Patil et al (1985) reported that the concentration of carbohydrates in sorghum lines susceptible to M. phaseolina was lower than that of tolerant sorghum lines. It is possible that the results observed in our present study could be explained by this photosynthetic stress-translocation balance theory (Dodd, 1980).…”

Section: Discussionmentioning

confidence: 99%

Influence of nitrogen, plant growth stage, and environment on charcoal rot of grain sorghum caused by Macrophomina phaseolina (Tassi) Goid

Cloud

Rupe

1994

Plant Soil

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Colonization of sorghum by Macrophomina phaseolina in field plots was determined at nitrogen fertilization rates of 0, 56, 112, and 168 kg ha PI in 1988 and 0, 84, 168, and 256 kg ha-' in 1989. Above ground plant tissue and roots were sampled monthly to determine total nitrogen and percent colonization of root segments by natural inoculum. Root infection was not affected by nitrogen treatment, but was affected by growth stage and environment. High root infection occurred before reproductive development (growth stage 3) in 1988 and was associated with hot, dry weather early in the growing season. In 1989, when the weather was cool and wet, root infection began after reproductive development (growth stage 4). The effect of nitrogen treatments on lesion length was determined in sorghum stalks artificially inoculated with M. phaseolina. Lesion lengths were significantly affected by both nitrogen treatments and growth stage. Lesions were significantly longer with all nitrogen treatments at growth stage 9 than with the no-nitrogen treatment, and lesions tended to increase with increased levels of nitrogen fertilization. Significant increases in lesion length occurred between growth stages 5, 7, and 9 in 1988 and between 7 and 9 in 1989. This study demonstrates that nitrogen fertilization affects colonization of sorghum stalks but not root infection by M. phaseolina.

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“…According to Shahabuddhin and Anwar (1992) there was a decrease in total sugar and reducing sugar in jute following inoculation with M. phaseolina. Patil et al (1985) reported that in tolerant genotypes the sugar level was two to three times higher than the susceptible ones. Total phenol content: The total phenol content was found to be higher in the resistant genotype followed by the moderately resistant ones and increased upon inoculation with the pathogen (Table 2).…”

Section: Resultsmentioning

confidence: 99%

Estimation of biochemical factors responsible for resistance to root and collar rot (Macrophomina phaseolina (Tassi) Goid.) in okra

Aravind

Brahmbhatt

2018

JANS

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Twenty okra genotypes were screened for their resistance to root and collar rot incited by Macrophomina phaseolina in the experimental fields of Department of Plant Pathology, B. A. College of Agriculture, Anand Agricultural University. Based on their disease reaction, they were grouped into four categories i.e., resistant, moderately resistant, susceptible and highly susceptible. The biochemical analysis of the resistant and susceptible genotypes revealed that the total soluble sugar, reducing sugar and non reducing sugar decreased following inoculation by the pathogen. The decrease in total soluble sugar, reducing sugar and non reducing sugar were 21.54, 21.73 and 21.42 per cent in resistant variety, whereas in highly susceptible variety it was 6.06, 6.10 and 3.03 per cent, respectively. The total phenol content, soluble protein and peroxidase activity increased on inoculation with the pathogen. In the resistant variety, the increase in phenol content, soluble protein and peroxidase activity was 23.4, 32.56 and 63.86 per cent whereas in moderately resistant variety this was 19.85, 21.63 and 55.29 per cent, respectively. Susceptible and highly susceptible genotypes had low to moderate increase in the three parameters. The experimental results confirmed the importance of these biochemical factors in imparting the host resistance to root and collar rot.

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Role of Sugars and Phenols in Charcoalrot Resistance of Sorghum

Cited by 11 publications

References 6 publications

Defense reaction and biochemical interpretation of rice genotypes to sheath blight, Rhizoctonia solani Kuhn

Defense reaction and biochemical interpretation of rice genotypes to sheath blight, Rhizoctonia solani Kuhn

Influence of nitrogen, plant growth stage, and environment on charcoal rot of grain sorghum caused by Macrophomina phaseolina (Tassi) Goid

Estimation of biochemical factors responsible for resistance to root and collar rot (Macrophomina phaseolina (Tassi) Goid.) in okra

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