Capsidiol accumulation in Capsicum annuum stems during the hypersensitive reaction to Phytophthora capsici

被引:21
作者
Egea, C
Perez, MDG
Candela, ME
机构
[1] Dept. Biologia Vegetal, Facultad Biologia, Universidad de Murcia
关键词
capsidiol; gas chromatography; hypersensitive reaction; pepper; phytophthora capsici;
D O I
10.1016/S0176-1617(96)80104-0
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Inoculation of the seems of the three varieties of C. annuum (L.), with different sensitivities to the pepper pathogen, P. capsici, resulted in a hypersensitive reaction of different length along the stems and the accumulation of capsidiol. This suggests that all the pepper cultivars analyzed contain a mechanism for recognizing this pathogen and the genetic information for initiating the defense response. The differences lie in the inhibitory capacity towards the fungal hyphae, which is only really effective in Smith-5, the sole variety in which pathogenic attack is stopped totally. Capsidiol accumulates in the stems of all the pepper cultivars when inoculated with P. capsici, although there are significant differences depending on the cultivar and on the histological zone of the stem studied. The greatest accumulation of capsidiol corresponds to the 6th day of infection in the necrotic zone of the resistant variety (Smith-5), suggesting that this variety alone has the ability to accumulate sufficiently high phytoalexin levels to inhibit fungal development.
引用
收藏
页码:762 / 764
页数:3
相关论文
共 9 条
[1]  
Alcazar M. D., 1993, Fitopatologia, V28, P77
[2]  
BAILEY JA, 1987, GENETICS PLANT PATHO, P233
[3]   SOLUBLE PHENOLIC-ACIDS IN CAPSICUM-ANNUUM STEMS INFECTED WITH PHYTOPHTHORA-CAPSICI [J].
CANDELA, ME ;
ALCAZAR, MD ;
ESPIN, A ;
ALMELA, L .
PLANT PATHOLOGY, 1995, 44 (01) :116-123
[4]   ISOPEROXIDASE INVOLVEMENT IN THE RESISTANCE OF CAPSICUM-ANNUUM TO INFECTION BY CUCUMBER MOSAIC-VIRUS [J].
CANDELA, ME ;
MUNOZ, R ;
ALCAZAR, MD ;
ESPIN, A .
JOURNAL OF PLANT PHYSIOLOGY, 1994, 143 (02) :213-217
[5]  
KUC J, 1985, ARCH BIOCHEM BIOPHYS, V236, P455
[6]  
MOLOT PM, 1981, PHYSIOL PLANT PATHOL, V18, P379
[7]  
STOESSL A, 1972, Phytopathologische Zeitschrift, V74, P141
[8]   FORMATION OF CAPSIDIOL IN CAPSICUM-ANNUUM FRUITS IN RESPONSE TO NON-SPECIFIC ELICITORS [J].
WATSON, DG ;
BROOKS, CJW .
PHYSIOLOGICAL PLANT PATHOLOGY, 1984, 24 (03) :331-337
[9]   GLYCEOLLIN - ITS ROLE IN RESTRICTING FUNGAL GROWTH IN RESISTANT SOYBEAN HYPOCOTYLS INFECTED WITH PHYTOPHTHORA-MEGASPERMA-VAR-SOJAE [J].
YOSHIKAWA, M ;
YAMAUCHI, K ;
MASAGO, H .
PHYSIOLOGICAL PLANT PATHOLOGY, 1978, 12 (01) :73-82