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首页> 外文期刊>Plant Pathology Journal >Induction of Resistance to Papaya Black Spot Elicited by Acibenzolar-S-Methyl
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Induction of Resistance to Papaya Black Spot Elicited by Acibenzolar-S-Methyl

机译：诱导苯甲酰-S-甲基对木瓜黑斑的抗性

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摘要

The objective of this study was to evaluate the effect of acibenzolar-S-methyl tested at 5 concentrations (0, 1, 5, 25 and 100 uM a.i.) for its ability to protect papaya (Carica papaya) cv. Rainbow from black spot (Asperisporium caricae) following inoculation with the fungus. Effects of resistance induction treatment against black spot disease were evaluated by measuring the plant height and stem diameter. Disease symptoms were scored weekly by visually estimating disease severity of plants on the basis of a 5-class visual scale of 0 (no symptoms) to 4 (extensive lesions on leaves). Accumulation of defence-related proteins in papaya leaves were also analysed and compared. Results revealed that the level of protection against A. caricae was dose-dependent. Maximum reduction of the disease in leaves was obtained with 25-100 pM acibenzolar-S-methyl, with a time interval of 3 days between application of the activator and inoculation with the pathogen. The systemic resistance elicitation was characterized by an increase in 2 pathogenesis-related proteins, chitinase and (3-1, 3-glucanase. These results indicate that acibenzolar-S-methyl induces partial resistance in papaya against black spot disease which may provide the grower a new option for integrated management of the disease.
机译：这项研究的目的是评估在5种浓度（0、1、5、25和100 uM a.i.）下测试的苯并噻吩-S-甲基保护木瓜（Carica papaya）cv的能力。接种真菌后来自黑点（Asperisporium caricae）的彩虹。通过测量植物高度和茎直径评估了抗黑点病诱导诱导处理的效果。通过基于0级（无症状）至4级（叶子上的广泛病害）的5类视觉等级，通过视觉估计植物的疾病严重性，每周对疾病症状进行评分。还分析和比较了木瓜叶片中与防御相关的蛋白质的积累。结果表明，抗龋齿螨的保护水平是剂量依赖性的。用25-100 pM苯并噻唑-S-甲基可以最大程度地减轻叶片上的病害，在施用活化剂和接种病原体之间间隔3天。引起全身抗药性的特征是增加了两种与病程相关的蛋白，几丁质酶和（3-1，3-葡聚糖酶）。这些结果表明，苯甲酰-S-甲基诱导了木瓜对黑斑病的部分抗性，这可能为种植者提供疾病综合管理的新选择。

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