Nonpathogenic Fusarium oxysporum strain Fo47 induces resistance to Fusarium wilt in tomato
Nonpathogenic Fusarium oxysporum strain Fo47 induces resistance to Fusarium wilt in tomato
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DOI：
10.1094/pdis.1997.81.5.492
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发表时间：
1997-05-01
期刊：
影响因子：
4.5
通讯作者：
Defago, G
中科院分区：
文献类型：
--
作者：
Fuchs, JG;MoenneLoccoz, Y;Defago, G
非致病性尖孢镰刀菌菌株Fo 47控制枯萎病的发病率。通过四种生物测定方法，对一株F. oxysporum F.番茄枯萎病菌（Fusarium sp. lycopersici）与Fo 47不直接接触的番茄枯萎病菌（Fusarium sp. lycopersici）之间的抗性关系，以评价Fo 47能否诱导番茄对枯萎病的抗性。Fo 47和病原体在物理上或在时间上分离。在水培条件下（两项生物测定）、盆栽混合物或高压灭菌土壤中进行生物测定。菌株Fo 47在所有四个生物测定中都保护番茄免受枯萎病的侵害。接种Fo 47增加了植物中几丁质酶、β-1，3-葡聚糖酶和β-1，4-葡萄糖苷酶的活性，证实了Fo 47诱导番茄抗性的能力。本报告首次证明了一种非致病性的F.尖孢霉能诱导番茄植株对枯萎病的抗性。这一结果对番茄病害的生物防治具有重要的实际意义。
Nonpathogenic Fusarium oxysporum strain Fo47 controls the incidence of Fusarium wilt. Four bioassays in which a strain of the pathogen F. oxysporum f. sp. lycopersici and Fo47 were not in direct contact were developed to evaluate whether Fo47 could induce resistance to Fusarium wilt in tomato plants. Fo47 and the pathogen were separated either physically or in time. Bioassays were carried out under hydroponic conditions (two bioassays), in potting mix, or in autoclaved soil. Strain Fo47 protected tomato against Fusarium wilt in all four bioassays. Inoculation with Fo47 increased chitinase, beta-1,3-glucanase, and beta-1,4-glucosidase activity in plants, confirming the ability of Fo47 to induce resistance in tomato. This report is the first to demonstrate that a nonpathogenic strain of F. oxysporum can induce resistance to Fusarium wilt in tomato plants. This result has important practical implications for biocontrol of tomato diseases under commercial conditions.