Superoxide generation in chemically activated resistance of barley in response to inoculation with the powdery mildew fungus

被引:12
作者
Kogel, KH [1 ]
Hückelhoven, R [1 ]
机构
[1] Univ Giessen, Inst Phytopathol & Angew Zool, D-35390 Giessen, Germany
来源
JOURNAL OF PHYTOPATHOLOGY-PHYTOPATHOLOGISCHE ZEITSCHRIFT | 1999年 / 147卷 / 01期
关键词
oxidative burst; acquired resistance; radical; hydrogen peroxide;
D O I
10.1046/j.1439-0434.1999.147001001.x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
In a previous work, a phenotype-specific accumulation of superoxide radical anions (O-2(.-)) after attack of the powdery mildew fungus (Blumeria [syn. Erysiphe] graminis f.sp. hordei) in near-isogenic barley (Hordeum vulgare L.) lines bearing different Mis genes for resistance was described (Huckelhoven and Kogel, 1998). We have now a histochemical study of the pathogenesis-related O-2(.-) generation in the systemic activated resistance (SAR) response induced in barley cv Pallas by the plant activator 2,6-dichloroisonicotinic acid (DCINA). SAR-specific defence was conducted prevalently characterized by penetration resistance. Fungal arrest was observed before haustorium formation by a highly localized cell wall reinforcement (effective papillae) and, in most cases, by a subsequent hypersensitive cell death (HR). No O-2(.-) generation was found in association with these plant defence responses. However, a strong O-2(.-) burst in the attacked epidermal cells was detected in the control plants which were not activated by DCINA. This burst coincided with cell wall penetration and subsequent contact of the pathogen with the host plasma membrane. A strong SAR-related O-2(.-) burst was induced in the mesophyll tissue beneath the attacked and hypersensitively reacting epidermal cells in plants treated with DCINA. The accumulation of O-2(.-) was confined to chloroplasts The remarkable burst in mesophyll tissue was not followed by mesophyll-HR indicating that chloroplastic O-2(.-) generation is not sufficient for the hypersensitive cell death. Since the same pattern of pathogenesis-related O-2(.-) accumulation was identified for race-specific response mediated by the Mlg gene for powdery mildew resistance, the present data are consistent with the hypothesis that the SAR phenotype is a phenocopy of the Mlg-type resistance (Kogel et al., 1994).
引用
收藏
页码:1 / 4
页数:4
相关论文
共 18 条
[1]   CONSEQUENCE OF O2(-) GENERATION DURING A BACTERIALLY INDUCED HYPERSENSITIVE REACTION IN TOBACCO - DETERIORATION OF MEMBRANE-LIPIDS [J].
ADAM, A ;
FARKAS, T ;
SOMLYA, G ;
HEVESI, M ;
KIRALY, Z .
PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY, 1989, 34 (01) :13-26
[2]  
BI JM, 1995, PLANT J, V8, P235
[3]   ACTIVE OXYGEN SPECIES IN THE INDUCTION OF PLANT SYSTEMIC ACQUIRED-RESISTANCE BY SALICYLIC-ACID [J].
CHEN, ZX ;
SILVA, H ;
KLESSIG, DF .
SCIENCE, 1993, 262 (5141) :1883-1886
[5]   Local and systemic responses of antioxidants to tobacco mosaic virus infection and to salicylic acid in tobacco - Role in systemic acquired resistance [J].
Fodor, J ;
Gullner, G ;
Adam, AL ;
Barna, B ;
Komives, T ;
Kiraly, Z .
PLANT PHYSIOLOGY, 1997, 114 (04) :1443-1451
[6]   rbohA a rice homologue of the mammalian gp91phox respiratory burst oxidase gene [J].
Groom, QJ ;
Torres, MA ;
FordhamSkelton, AP ;
HammondKosack, KE ;
Robinson, NJ ;
Jones, JDG .
PLANT JOURNAL, 1996, 10 (03) :515-522
[7]   Tissue-specific superoxide generation at interaction sites in resistant and susceptible near-isogenic barley lines attacked by the powdery mildew fungus (Erysiphe graminis f. sp. hordei) [J].
Hückelhoven, R ;
Kogel, KH .
MOLECULAR PLANT-MICROBE INTERACTIONS, 1998, 11 (04) :292-300
[8]   SPECIFICITY OF CELL TYPE AND TIMING OF EVENTS ASSOCIATED WITH PAPILLA FORMATION AND THE HYPERSENSITIVE REACTION IN LEAVES OF HORDEUM-VULGARE ATTACKED BY ERYSIPHE-GRAMINIS FSP HORDEI [J].
KOGA, H ;
BUSHNELL, WR ;
ZEYEN, RJ .
CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE, 1990, 68 (11) :2344-2352
[9]   ACQUIRED-RESISTANCE IN BARLEY - THE RESISTANCE MECHANISM INDUCED BY 2,6-DICHLOROISONICOTINIC ACID IS A PHENOCOPY OF A GENETICALLY BASED MECHANISM GOVERNING RACE-SPECIFIC POWDERY MILDEW RESISTANCE [J].
KOGEL, KH ;
BECKHOVE, U ;
DRESCHERS, J ;
MUNCH, S ;
ROMME, Y .
PLANT PHYSIOLOGY, 1994, 106 (04) :1269-1277
[10]   NEAR-ISOGENIC BARLEY LINES WITH GENES FOR RESISTANCE TO POWDERY MILDEW [J].
KOLSTER, P ;
MUNK, L ;
STOLEN, O ;
LOHDE, J .
CROP SCIENCE, 1986, 26 (05) :903-907