GENETICS AND CYTOLOGY OF AGE-RELATED RESISTANCE IN NORTH-AMERICAN CULTIVARS OF COWPEA (VIGNA-UNGUICULATA) TO THE COWPEA RUST FUNGUS (UROMYCES-VIGNAE)

被引:18
作者
HEATH, MC
机构
来源
CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE | 1994年 / 72卷 / 05期
关键词
COWPEA; RUST FUNGI; AGE-RELATED RESISTANCE;
D O I
10.1139/b94-076
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Increasing leaf age was accompanied by increases in resistance in three incompatible cowpea cultivars inoculated with race 1 of Uromyces vignae and in three of four cultivars that had previously been considered susceptible to race N2. Selected crosses between cultivars suggested that resistance to race 1 was controlled by the same genes in young and old leaves, and they indicated that age-related resistance to race N2 was primarily controlled by a single, and different, gene in each cultivar. All examples of resistance were expressed cytologically as a range of infection site types in a single leaf, the frequency distribution of which was affected by the type of resistance gene, gene heterozygosity, and leaf age. These frequency distributions shifted with increasing leaf age towards infection sites with less fungal growth and more rapid plant cell necrosis, often abolishing the cytological differences between cultivars and genotypes seen in younger plants. The data suggest that each rust resistance gene in cowpea can generate a range of infection site types, and that fungal growth and plant responses at each infection site are governed by a combination of the number and type of resistance genes in the plant, the race of the fungus, and age-affected features of individual plant cells.
引用
收藏
页码:575 / 581
页数:7
相关论文
共 19 条
[1]   EXPRESSION OF GENE-SPECIFIC AND AGE-RELATED RESISTANCE AND THE ACCUMULATION OF GLYCEOLLIN IN SOYBEAN LEAVES INFECTED WITH PHYTOPHTHORA-MEGASPERMA F SP GLYCINEA [J].
BHATTACHARYYA, MK ;
WARD, EWB .
PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY, 1986, 29 (01) :105-113
[2]  
Bushnell W. R., 1982, PLANT INFECTION PHYS, P97
[3]   INHERITANCE OF RESISTANCE TO UROMYCES-VIGNAE IN COWPEA AND THE CORRELATION BETWEEN RESISTANCE AND SENSITIVITY TO A CULTIVAR-SPECIFIC ELICITOR OF NECROSIS [J].
CHEN, CY ;
HEATH, MC .
PHYTOPATHOLOGY, 1993, 83 (02) :224-230
[4]  
CHEN CY, 1990, PHYSIOL MOL PLANT P, V37, P169, DOI 10.1016/0885-5765(90)90009-M
[5]   EFFECT OF STAGE OF DEVELOPMENT OF THE COWPEA RUST FUNGUS ON THE RELEASE OF A CULTIVAR-SPECIFIC ELICITOR OF NECROSIS [J].
CHEN, CY ;
HEATH, MC .
PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY, 1992, 40 (01) :23-30
[7]  
GAY JD, 1971, PLANT DIS REP, V55, P384
[8]   HAUSTORIAL SHEATH FORMATION IN COWPEA LEAVES IMMUNE TO RUST INFECTION [J].
HEATH, MC .
PHYTOPATHOLOGY, 1971, 61 (04) :383-+
[9]   ULTRASTRUCTURE OF HOST AND NONHOST REACTIONS TO COWPEA RUST [J].
HEATH, MC .
PHYTOPATHOLOGY, 1972, 62 (01) :27-&
[10]  
HEATH MC, 1981, PHYSIOL PLANT PATHOL, V18, P149