The endophytes treated rice plots registered a significantly lower intensity of bacterial leaf blight 2. The bacterial blight bb disease of rice bacterial blight caused by xanthomonas oryzae pv. In severe epidemics, crop loss may be as high as 75 percent, and millions of hectares of rice are infected annually. Submitted by naipictuasdharwad on tue, 28072009 10. Rice associated bacteria rabs isolated from rice plants grown in the field were tested for their antagonistic activities against the rice pathogens, rhizoctonia solani and burkholderia glumae, which cause sheath blight and bacterial.
Fortyone rice genotypes including bacterial blight resistant were collected to evaluate diversity. The development of resistant cultivars has been the most effective and economical strategy to control the disease under deepwater situation. In severe epidemics, crop loss may be as high as 75 percent, and millions. Metabolomic profiling of bacterial leaf blight in rice. Significant variations among morphological traits were observed. As affected panicles mature, they appear progressively more damaged as seen on these in a bengal field. Panicles in a heavily affected field of cl151 during 2010 in arkansas. Bacterial panicle blight of rice in arkansas fsa7580. Molecular genetics and genomics of bacterial panicle. Magnaporthe grisea, also known as rice blast fungus, rice rotten neck, rice seedling blight, blast of rice, oval leaf spot of graminea, pitting disease, ryegrass blast, and johnson spot, is a plantpathogenic fungus that causes a serious disease affecting rice. Biological control of rice bacterial blight by plant. Bacterial blight, a serious threat to productivity of rice oryza sativa l.
Plant growth promotion and suppression of bacterial leaf. The earlier the disease occurs, the higher the yield loss. Bacterial blight of rice is an important disease in asia and africa. Bacterial blight is one of the most serious diseases of rice. It was first found in japan in 1884 1885, and research on the disease was commenced as early as in 1901. Mar 23, 2015 bacterial blight of rice ppt slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Biological control activities of riceassociated bacillus sp. It was first noticed by the farmers in fukuoka prefecture kyushu island, japan, as early as in 188485. Bacterial leaf blight of rice kills seedlings and destroys the leaves of older plants. However, we have started seeing some on conventional rice at rrec rice research and experiment center in observation and experimental plots.
This study analyzed hyperspectral canopy reflectance spectra of two rice cultivars with different susceptibilities to blb to establish spectral models for assessing disease severity for future sitespecific management. In the present study, we have screened 1176 accessions. Spot a spot is a localized necrotic or dead area photo 4. Bacterial blight causes wilting of seedlings and yellowing and drying of leaves. Agromorphological characterization and assessment of. Pathogenicity tests, transgenic rice abstract a simple and reliable. Bacterial blight, a serious threat to productivity of rice. In the quest for increasing rice production, man has resorted to intensive methods of rice cultivation involving highyielding susceptible cultivars with reduced genetic variability, higher plant population per unit area, high doses of nitrogenous fertilizers and staggered sowing and planting which intensified the severity of bacterial blight rice in most of the asian countries. Proceedings of the international workshop on bacterial blight of rice, 1418 march 1988.
Bacterial panicle blight is a major disease of rice that tends to develop during hot, dry weather. Certain plantassociated strains of fluorescent pseudomonas spp. Screening of rice varieties for resistance to bacterial leaf blight 3744 fertilizer application. Modeling of bacterial leaf blight disease assessment and. The genus xanthomonas, which mostly comprises phytopathogenic bacteria, is a member of the family xanthomonadaceae. Through rigorous screening and selection, a number of resistant cultivars have been produced and utilized, but resistance was overcome by the development of mutant strains of. Pdf bacterial blight bb of rice caused by xanthomonas oryzae pv. Now these tech nologies are being used to characterize the pathogen, reevaluate the ecology and epidemiology of the disease, and study hostparasite. On the basis of mean lesion length at 15 days after inoculation, seven cultivars showed resistance, 4 moderately resistance, 6 moderately susceptible and 17 cultivars were susceptible to bacterial leaf blight.
Management of bacterial leaf blight of rice agropedia. Bacterial leaf blight blb of rice, caused by the xanthomonas oryzae pv. The present study was conducted to evaluate the potential of rice rhizosphere associated antagonistic bacteria for growth promotion and disease suppression of bacterial leaf blight blb. The products amplified with the sts marker rg6 for xa were digested with restriction enzyme hinfi. Lincoln mandal1, sunil kumar verma2, saugata sasmal3 and jawahar lal katara4 1department of agriculture and biotechnology, cg, india 2department of genetics and plant breeding, cars, india 3krishi vigyan kendra, igkv, india. Epidemiology and control of bacterial leaf blight of rice. Bacterial panicle blight of rice burkholderia glumae and burkholderia gladioli severin yabuchi, et al. Mansfield 1 biotechnology division, bangladesh rice research institute, gazipur1701, bangladesh key words. Tremendous progress has been made in characterizing the disease and breeding for.
The lesions run parallel along the leaf and when they join together may cover the whole leaf. Pdf an overview of bacterial blight disease of rice and strategies. Frontiers biocontrol of bacterial leaf blight of rice and. Jan 21, 2014 bacterial leaf blight blb is one of the most serious threats to the rice crop in irrigated and rainfed areas of the world. Bacterial blight quantitative resistance in rice oryza. Bacterial leaf blight blb is an economically important disease of rice caused by xanthomonas oryzae pv. Evaluation of rice genotypes resistance to bacterial leaf. Jul 26, 2014 bacterial blight bb of rice caused by xanthomonas oryzae pv. Dry rot is firm or dry decay, while soft rot is soft, watery decomposition. Seedlings in the nursery show circular, yellow spots in the margin, that enlarge, coalesce leading to drying of foliage. Principal component analysis supported cluster analysis. An overview of bacterial blight disease of rice and strategies for its management article pdf available in current science 7711 december 1999 with 2,216 reads how we measure reads.
Jul 30, 2017 bacterial leaf blight of rice is one of the most caustic diseases of rice throughout the world. May 31, 2015 jalmagna is a popular deepwater rice variety with farmers of india because of its good yield under waterlogged condition. The disease was first observed by the farmers of japan in 1884 tagami and mizukami, 1962. Currently, the use of resistant rice cultivars is the most economical and effective way to combat blb. The fourth international conference on bacterial blight 4th icbb of rice was held in hyderabad, india on 24 december 20, and was jointly organized by the centre for cellular and molecular biology ccmb, directorate of rice research drr and the society for the advancement of rice research. The disease is observed in both seedlings and older plants. Pyramiding of three bacterial blight resistance genes.
Distribution except for maharashtra, where the endemic area was estimated to be about 0. Appearance of bacterial ooze that looks like a milky or. Mar 31, 2017 bacterial leaf blight of rice xanthomonas oryzae pv. None of the individual bb resistant xa xa genes is effective against punjab pathotypes. Welcom e bacterial leaf blight diseases of rice and their management muhammad ammar bagf14e216 university college of agriculture university of sargodha 2.
Breeding approaches for bacterial leaf blight resistance in. Besides the economic importance of the disease, the rice xoo system serves as an excellent model for studying hostpathogen interactions because the genomes of both interacting partners are sequenced and there is considerable genetic variation in the. Focus on bacterial blight of rice bacterial blight of rice, caused by xanthomonas or pw. Materials and methods incidence and severity of bacterial leaf blight of rice in pakistan three comprehensive surveys of all rice growing zones of pakistan were conducted at the mature grain stage of. Jalmagna is a popular deepwater rice variety with farmers of india because of its good yield under waterlogged condition. Pdf update on bacterial blight of rice researchgate. Detection of bacterial blight resistance genes in basmati. Screening of rice varieties for resistance to bacterial. Recovery plan for xanthomonas oryzae causing bacterial blight and bacterial leaf streak of rice june 4, 20 contents page executive summary 2 contributors 4 i. Bacterial leaf blight blb is one of the most serious threats to the rice crop in irrigated and rainfed areas of the world. A total of 811 rhizospheric bacteria were isolated and screened against 3 prevalent strains of blb pathogen xanthomonas oryzae pv.
Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. It may be circular, angular, or irregular in shape. What it does it causes wilting of seedlings, yellowing and drying of leaves. If you continue browsing the site, you agree to the use of cookies on this website. The present study aimed to develop inocula, based on native antagonistic bacteria for biocontrol of blb and to increase the. Pdf management of bacterial leaf blight disease in rice. Identification of resistance sources in wild species of rice. Bacterial leaf blight of rice is one of the most caustic diseases of rice throughout the world. International journal of current microbiology and applied. The bacterial blight disease of rice having been recognised in india recently, the informa tion available on various aspects of the disease under indian. We also wish to thank the entire staff and administration of the rice research and extension center, universityof arkansas system division.
We greatly appreciate the financial support from the rice farmers of arkansas through the rice checkoff administered by the arkansas rice research and promotion board. Recently, it has also been reported from east africa. Bacterial blight quantitative resistance in rice oryza sativa l. No bacterial panicle blight bpb has been reported from commercial fields to date 728. Breeding approaches for bacterial leaf blight resistance. Rice facts rice is the staple food of almost half of the worlds population more than 90% of worlds rice is grown and consumed in asia. It is most likely to develop in areas that have weeds and stubbles of infected. However, the variety is highly susceptible to bacterial blight bb disease. Pdf this is a status paper on a destructive rice disease bac terial blight bb, caused by xanthomonas oryzae pv. Severe epidemics recorded in 1979 and 1980 in northwestern india, reducing the grain yields drastically.
Large yield losses from the outbreaks of bacterial panicle blight have been experienced especially in the growing seasons with prolonged high night temperatures and drought conditions. Biological control activities of riceassociated bacillus. The disease is extremely serious worldwide and has emerged as a. Bacterial leaf blight of rice an infected leaf has yellow watersoaked lesions at the margin of its leaf blade. Pdf an overview of bacterial blight disease of rice and. The interaction between xoo and rice is governed by resistance genes in rice and correspond. There is a need to use environmentally safe approaches to overcome the loss of grain yield in rice due to this disease. Bacterial blight bb of rice caused by xanthomonas oryzae pv. Bacterial leaf blight of rice africa soil health consortium cabi. Screening of rice varieties for resistance to bacterial leaf.
Identification of bacterial panicle blight of rice figurea. Efficacy of bacteriocinogenic strains of xanthomonas oryzae pv. Besides the economic importance of the disease, the ricexoo system serves as an excellent model for studying hostpathogen interactions because the genomes of both interacting partners are sequenced and there is considerable genetic variation in the. On seedlings, infected leaves turn greyish green in colour and roll up. Assessment of the severity of bacterial leaf blight in. Why is it important bacterial blight is one of the most serious diseases of rice. Losses include reduced yield and milling, and losses reported in commercial rice fields vary from a trace to as high as 70 percent. Frontiers biocontrol of bacterial leaf blight of rice. Rotting is disintegration and decomposition of host tissue photo 3. Rice bacterial blight, also called bacterial blight of rice, deadly bacterial disease that is among the most destructive afflictions of cultivated rice oryza sativa and o. Photos of rice bacterial panicle blight disease caused by the bacteria burkholderia glumae and b. Bacterial blight of bean xanthomonas axonopodis pv.
Bacterial blight resistance genes in basmati rice with ethidium bromide, and documented by the nyxtechnik gel documentation system. Pdf bacterial blight, a serious threat to productivity. The disease is extremely serious worldwide and has emerged as a major problem in irrigated crops in the sahel. Materials and methods incidence and severity of bacterial leaf blight of rice in pakistan three comprehensive surveys of all rice growing zones of pakistan were conducted at the mature grain stage of the crop during 20052007, on annual basis. Biological control of rice bacterial blight by plantassociated bacteria producing 2,4diacetylphloroglucinol palaniyandi velusamy, j. Riceassociated bacteria rabs isolated from rice plants grown in the field were tested for their antagonistic activities against the rice pathogens, rhizoctonia solani and burkholderia glumae, which cause sheath blight and bacterial. Among several diseases caused by bacterial, fungal, and viral pathogens that devastate rice yields all over the world, bacterial blight bb xanthomonas oryzae. Note upright panicles with mixture of tan and greenish kernels. Potential biological control agents for two major rice diseases, sheath blight and bacterial panicle blight, were isolated from rice plants in this study. Diagnosis of common diseases of rice home irri rice. Highlights this is the first report on genetic diversity of nils and pyramid lines rice in malaysia. Watersoaked to yellowish stripes on leaf blades or starting at leaf tips then later increase in length and width with a wavy margin 2.
Bacterial blight is a destructive disease of rice causes 2050% yield losses in conducive conditions. The most important bacterial pathogen of rice is xanthomonas oryzae pv. Use of chemicals is an important part of plant disease management. Identification of resistance sources in wild species of rice against two recently evolved pathotypes of xanthomonas oryzae pv oryzae volume 15 issue 6 kumari neelam, jagjeet singh lore, karminderbir kaur, shivali pathania, kishor kumar, gurpreet sahi, gurjit s mangat, kuldeep singh. Yield loss due to bacterial blight can be as much as 70% when susceptible varieties are grown, in environments favorable to the disease. Bacterial blight is a monsoon disease and its incidence and severity is very much influenced by rainfall, number of rainy days, and susceptibility of the cultivar and nitrogen fertilizer application. Broadspectrum resistance to bacterial blight in rice. Proceedings of the international workshop on bacterial blight of rice, 1418 march 1988 on. Bacterial leaf blight blb is an important vascular disease of irrigated rice and serious infestations may cause a significant loss of yield. The bacterial leaf blight disease of rice was first observed in the latter part of the last century in various localities of southern japan. May 18, 2016 bacterial blight is a major disease of rice. The disease was first observed in 188485 in kyushu, japan, and the causal agent, the.
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