PHENOTYPIC DIVERSITY OF XANTHOMONAS-ORYZAE PV ORYZAE IN NEPAL

被引：20

作者：

ADHIKARI, TB ^{[1
]}

MEW, TW ^{[1
]}

TENG, PS ^{[1
]}

机构：

[1] INT RICE RES INST, DIV PLANT PATHOL, MANILA, PHILIPPINES

来源：

PLANT DISEASE | 1994年 / 78卷 / 01期

关键词：

BACTERIAL BLIGHT OF RICE; DIFFERENTIAL INTERACTION; EPIDEMIOLOGY; ORYZA-SATIVA; PATHOGEN VARIATION;

D O I：

10.1094/PD-78-0068

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Fifty-three strains of Xanthomonas oryzae pv. oryzae collected from various rice-growing areas in Nepal were characterized for differences in biochemical and physiological characteristics, bacteriocin production, and virulence. Numerical analysis of phenotypic features revealed that all strains were associated at 82.4% similarity of coefficient (S(sm)) in the dendrogram. No distinct phenons were observed, suggesting homogeneous populations of X. o. oryzae. Forty-four percent of the strains produced bacteriocin, and six bacteriocin groups were distinguished. Inoculation of X. o. oryzae strains on five IRRI differential rice cultivars (IR8, IR20, IR1545-339-2-2, Cas209, and DV85) and three Nepalese rice cultivars (Himali, Laxmi, and Sabitri) demonstrated significant cultivar-strain interaction. As a result, nine pathogenic races of X. o. oryzae were detected. Race 1 isolated from Nepal was similar to race 6 of the Philippines X. o. oryzae. No relationship was observed between virulence and physiological characteristics or bacteriocin production.

引用

页码：68 / 72

页数：5