HOST-RANGE OF A PLANT-PATHOGENIC FUNGUS DETERMINED BY A SAPONIN DETOXIFYING ENZYME

被引：197

作者：

BOWYER, P ^{[1
]}

CLARKE, BR ^{[1
]}

LUNNESS, P ^{[1
]}

DANIELS, MJ ^{[1
]}

OSBOURN, AE ^{[1
]}

机构：

[1] JOHN INNES INST, JOHN INNES CTR PLANT SCI RES, SAINSBURY LAB, NORWICH NR4 7UH, NORFOLK, ENGLAND

来源：

SCIENCE | 1995年 / 267卷 / 5196期

关键词：

D O I：

10.1126/science.7824933

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Antifungal saponins occur in many plant species and may provide a preformed chemical barrier to attack by phytopathogenic fungi. Some fungal pathogens can enzymatically detoxify host plant saponins, which suggests that saponin detoxification may determine the host range of these fungi. A gene encoding a saponin detoxifying enzyme was cloned from the cereal-infecting fungus Gaeumannomyces graminis. Fungal mutants generated by targeted gene disruption were no longer able to infect the saponin-containing host oats but retained full pathogenicity to wheat (which does not contain saponins). Thus, the ability of a phytopathogenic fungus to detoxify a plant saponin can determine its host range.

引用

页码：371 / 374

页数：4

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