Foliar spray of validamycin A or validoxylamine A controls tomato Fusarium wilt
Foliar spray of validamycin A or validoxylamine A controls tomato Fusarium wilt
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DOI：
10.1094/phyto-95-1209
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发表时间：
2005-10-01
期刊：
影响因子：
3.2
通讯作者：
Arie, T
中科院分区：
文献类型：
--
作者：
Ishikawa, R;Shirouzu, K;Arie, T
番茄枯萎病是由土传真菌尖孢镰刀菌（Fusarium oxysporum f.番茄斑点病菌（sp. lycopersici），通过叶面喷洒井冈霉素A（VMA）或井冈羟胺A（VAA）（>= 10 μ g/ml）可有效防治;然而，VMA和VAA在体外均不抗真菌。在盆栽试验中，叶面施用100 μ g/ml的VMA或VAA的效果持续64天。用VMA或VAA喷洒的植物积累水杨酸，并且具有系统获得抗性（SAR）标记基因P4（PR-1）、Tag（PR-2）和NP 24（PR-5）的表达升高。叶面喷施VMA对番茄晚疫病和白粉病也有一定的防治效果。VMA和VAA的病害控制作用可持续64天，具有广谱性，并诱导PR基因的表达，这些基因都是SAR的重要指标，表明VMA和VAA是植物激活剂。植物活化剂的叶面施用是一种新的控制土传病害的方法，并可能提供一种经济可行的替代土壤熏蒸剂，如甲基溴。
Tomato wilt, caused by the soilborne fungus Fusarium oxysporum f. sp. lycopersici, is effectively controlled by a foliar spray of validamycin A (VMA) or validoxylamine A (VAA) (>= 10 mu g/ml); however, neither VMA nor VAA is antifungal in vitro. In pot tests, the effect of a foliar application of VMA or VAA at 100 mu g/ml lasted for 64 days. Plants sprayed with VMA or VAA accumulated salicylic acid and had elevated expression of the systemic acquired resistance (SAR) marker genes P4 (PR-1), Tag (PR-2), and NP24 (PR-5). Foliar spray of VMA also controlled late blight and powdery mildew of tomato. The disease control by VMA and VAA lasted up to 64 days after treatment, was broad spectrum, and induced the expression of PR genes, all essential indicators of SAR, suggesting that VMA and VAA are plant activators. The foliar application of plant activators is a novel control method for soilborne diseases and may provide an economically feasible alternative to soil fumigants such as methyl bromide.