Host-pathogen interaction in rice-bacterial blight pathosystem
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Central Rice Research Institute, Cuttack-753 006, Orissa, India
Nayak Parsuram
Central Rice Research Institute, Cuttack-753 006, Orissa, India
Journal of Plant Protection Research 2008;48(3):371–384
Virulence pattern among 52 isolates of Xanthomonas oryzae pv. oryzae, the causal organism of bacterial blight disease was tested on 16 rice genotypes possessing 11 known Xa genes conferring resistance. Significant differences among the host genotypes as well as the pathogen isolates and in their interaction, suggested that the host genotypes differed in vertical resistance and the pathogen isolates differed in virulence. None of the genotypes exhibited resistant reaction against all the isolates,while one Japanese and two IRRI differentials were knocked down by all the isolates. The set of 16 rice genotypes possessed the Xa genes viz. Xa1, 2, 3, 4, 5, 6, 7, 10, 11, 12 & 13. The isolates carried 4–11 virulence factors, out of a total number of 11 v-factors that could be evaluated from this set of host genotypes to overcome the resistance offered by the corresponding Xa genes. The pattern with virulence to Xa1, 2, 4 & 11 and avirulence to the genes Xa6, 7, 5, 13 & 10 was very common. The wide distribution of the virulence factors over different states of India suggested nonparallelism between virulence pattern and geographical distribution of the isolates. The 52 isolates could be classified into five groups using hierarchical agglomerative method of cluster analysis based on the number of v-factors possessed by each of them viz. 11, 10, 8, 7 & 4, which were equivalent to the pathotype grouping of 1, 4, 7, 14+15 & 16, respectively. The application of the methods of numerical taxonomy emerged as a valuable tool in classification of bacterial isolates into virulence groupings.
The authors have declared that no conflict of interests exist.
Adhikari T.B., Basnyat R.C., Mew T.W. 1999. Virulence of Xanthomonas oryzae pv. oryzae on rice lines containing single resistance genes and gene combinations. Plant Dis. 83: 46–50.
Browder L.E., Eversmeyer M.G. 1977. Pathogenicity associations in Puccinia recondita tritici. Phytopathology 67: 766–771.
Browder L.E., Lyon F.L., Eversmeyer M.G. 1980. Races, pathogenicity phenotypes and type cultures of plant pathogens. Phytopathology 70: 581–583.
Ezuka A. Horino O. 1974. Virulence and aggressiveness in Xanthomonas oryzae. Tokai Kinki Natl. Agril. Exp. Stn. Bull. 27: 26–34.
Flor H.H. 1955. Host-parasite interaction in flax rust. Its genetics and other implications. Phytopathology 45: 680–685.
Gu K., Tian D., Yang F., Wu L., Sreekala C., Wang D., Wang G.L., Yin Z. 2004. High-resolution genetic mapping of Xa27(t), a new bacterial blight resistance gene in rice, Oryza sativa L. Theor. Appl. Genet. 108: 800–807.
Gupta A.K., Sharma S.C., Saini R.G. 1986. Variation in pathogenicity of some Indian isolates of Xanthomonas campestris pv. oryzae. Phytopathology 76: 881–883.
Kauffman H.E., Reddy A.P.K., Hsieh S.P.Y., Merca S.D. 1973. An improved technique for evaluating resistance of rice varieties to Xanthomonas oryzae. Plant Dis. Reptr. 57: 537–541.
Khare N., Thrimurty V.S. 2006. Evaluation of rice genotypes possessing known genes for resistance to bacterial blight disease. Oryza 43: 75–77.
Lebeda A. 1981. Population genetics of lettuce downy mildew (Bremia lactucae). Phytopathol. Z. 101: 228–239.
Lebeda A. 1982. Measurement of genetic diversity of virulence in populations of phytopathogenic fungi. Z. Pflanzenkrh. Pflanzenschtz. 89: 88–95.
Lebeda A., Jendrulek T. 1987. Application of cluster analysis for establishment of genetic similarity in gene-for-gene host-parasite relationships. J. Phytopathology 119: 131–141.
Mew T.W. 1987. Current status and future prospects of research on bacterial blight of rice. Annu. Rev. Phytopathol. 25: 359–382.
Mew T.W., Vera Cruz C.M. 1979. Variability of Xanthomonas oryzae: Specificity in infection of rice differentials. Phytopathology 69: 152–155.
Nayak P. 1986. Host-pathogen interaction in bacterial blight pathosystem in rice. Acta Phytopathol. Entomol. Hungarica 21: 109–114.
Nayak D. Reddy P.R. 1993. Classification of rice varieties and isolates of bacterial blight pathogen on the basis of differential interaction. Oryza 30: 268–271.
Nayak D., Reddy P.R., Nayak P. 2006. Variability in Xanthomonas oryzae pv. oryzae the incitant of bacterial blight disease of rice. I. Physiological characterization of the isolates. Oryza 43: 125–136.
Nayak D, Bose L.K., Singh U.D., Singh S., Nayak P. 2008a. Measurement of genetic diversity of virulence in populations of Xanthomonas oryzae pv. oryzae in India. Communications in Biometry and Crop Sci. 3: 16–28.
Nayak D., Shanti M.L., Bose L.K., Singh U.D., Nayak P. 2008b. Pathogenicity association in Xanthomonas oryzae pv. oryzae – the causal organism of rice bacterial blight disease. J. Agric. Biol. Sci. 3: 12–27.
Ogawa T. 1993. Methods and strategy for monitoring race distribution and identification of resistance genes to bacterial leaf blight (Xanthomonas campestris pv. oryzae) in rice. JARQ 27: 71–80.
Ou S.H., Nuque F.L., Silva J.P. 1971. Pathogenic variation among isolates of Xanthomonas oryzae at the Philippines. Plant Dis. Reptr. 55: 22–26.
Parlevliet J.E. 1983. Race-specific resistance and cultivar-specific virulence in the barley-leaf rust pathosystem and their consequences for the breeding of leaf rust resistant barley. Euphytica 32: 367–375.
Person C. 1959. Gene-for-gene relationship in host-parasite system. Can. J. Bot. 37: 1101–1130.
Priestley R.H., Bayles R.A., Ryall J. 1984. Identification of specific resistance against Puccinia striiformis (Yellow rust) in winter wheat varieties. II. Use of cluster analysis. J. Natl. Inst. Agric. Bot. 16: 477–485.
Shanti M.L., Shenoy V.V. 2005. Evaluation of resistance genes and their pyramids against rice bacterial leaf blight pathogen Xanthomonas oryzae pv. oryzae. Oryza 42: 169–173.
Shanti M.L., George M.L.C., Vera Cruz C.M., Bernardo M.A., Nelson R.J., Leung H., Reddy J.N., Sridhar R. 2001. Identification of resistance genes effective against rice bacterial blight pathogen in Eastern India. Plant Dis. 85: 506–512.
Sneath P.H.A., Sokal P.R. 1973. Numerical Taxonomy – The Principles and Practices of Numerical Classification. WH Freeman and Co., San Fransisco, 573 pp.
van der Plank J.E. 1968. Disease Resistance in Plants. Academic Press, New York and London, 206 pp.
Vera Cruz C.M., Mew T.W. 1989. How variable is Xanthomonas campestris pv. oryzae? In: Bacterial Blight of Rice, IRRI, PO Box 933, Manila, Philippines: 153–166.