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首页> 外文期刊>Plant Protection Science >High night temperature promotes downy mildew in grapevine via attenuating plant defence response and enhancing early Plasmopara viticola infection
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High night temperature promotes downy mildew in grapevine via attenuating plant defence response and enhancing early Plasmopara viticola infection

机译：通过衰减植物防御反应和增强早期Plasmopara viticola感染，高夜间温度促进葡萄树中的柔软霉菌

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摘要

The night temperature is one of the critical environmental factors affecting the grape berry quality. The objective of this study was to clarify whether a high night temperature promotes downy mildew on grapevines. The high night temperature conditions suppressed the gene expression of the pathogenesis-related proteins in the grapevine cultured cells and grapevine seedlings compared with the control night temperature conditions. The Plasmopara viticola colony formation on the leaves of the seedlings exposed to the control night temperature conditions became slightly noticeable on day 5 after inoculation, whereas a large number of colonies were clearly observed on the leaves of the seedlings exposed to the high night temperature conditions. On day 10 after inoculation, the leaf defoliation and withering were marked in the P. viticola infected seedlings exposed to the high night temperature conditions. The high night temperature conditions promoted the P. viticola zoospore germination. These results suggest that the high night temperature promoted the grape downy mildew by attenuating the constitutive plant defence response as well as enhancing the P. viticola early infection. Viticulturists should be vigilant regarding pest management strategies against the P. viticola primary infection of grapevines when high night temperatures continue for a long time.
机译：夜间温度是影响葡萄果实品质的关键环境因素之一。这项研究的目的是阐明夜间高温是否会促进葡萄霜霉病的发生。与对照夜温条件相比，高温夜温条件抑制了葡萄培养细胞和葡萄幼苗中致病相关蛋白的基因表达。接种后第5天，暴露于对照夜间温度条件下的幼苗叶片上的葡萄霜霉病原虫菌落形成变得略微明显，而暴露于夜间高温条件下的幼苗叶片上清晰地观察到大量菌落。在接种后第10天，暴露于夜间高温条件下的葡萄孢霉感染幼苗出现明显的落叶和枯萎。夜间高温条件促进了葡萄孢杆菌游动孢子的萌发。这些结果表明，夜间高温通过减弱植物的防御反应以及增强葡萄霜霉病的早期感染，促进了葡萄霜霉病的发生。当夜间高温持续很长一段时间时，葡萄栽培者应警惕害虫管理策略，防止葡萄树感染葡萄白粉菌。

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