水稻黄单胞菌2个致病变种的表型和趋化性比较研究

doi:10.16088/j.issn.1001-6600.2019.02.022

Abstract

Abstract: Xanthomonas oryzae pv. oryzae and Xanthomonas oryzae pv. oryzicola are two pathovars of Xanthomonas oryzae. They have distinct differences in invasion paths, colonization niches in host plant, and disease symptoms. In this paper, the basic phenotype and chemotaxis of the two kinds of bacteria were analyzed by plate method and capillary method respectively, and the pathogenicity on the rice Oryza sativa L. japonica cultivar Nipponbare was tested by using the method of leaf-cutting inoculation and pressure infiltration inoculation. The results showed that the two kinds of bacteria were consistent in some indexes tested. They could form the yellow colony, and synthesize a considerable amount of extracellular polysaccharide and extracellular amylase. They also share similar chemotactic reactions to sucrose, amino acids and rice extracts. However, there are significant differences between the two bacteria in secreting extracellular protease and cellulase, and the chemotactic responses to glucose, xylose, fructose, citric acid, and many kinds of plant hormones.

Key words: Xanthomonas oryzae pv. oryzae, Xanthomonas oryzae pv. oryzicola, phenotypes, chemotaxis, pathogenicity

CLC Number:

S432.1

XU Lidan, ZHAO Min, LI Meilin, ZENG Chen, MO Xiuyu, LIU Meina, ZHU Pingchuan, HE Yongqiang. Comparative Study on Basic Phenotypes and Chemotaxis of the Two Pathovars of Xanthomonas oryzae[J].Journal of Guangxi Normal University(Natural Science Edition), 2019, 37(2): 179-187.

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Comparative Study on Basic Phenotypes and Chemotaxis of the Two Pathovars of Xanthomonas oryzae

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