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Susceptibility to flavescence dorée of different Vitis vinifera genotypes from north‐western Italy
Plant Pathology ( IF 2.3 ) Pub Date : 2020-10-21 , DOI: 10.1111/ppa.13301 Matteo Ripamonti 1, 2 , Mattia Pegoraro 2 , Cristina Morabito 1 , Ivana Gribaudo 2 , Andrea Schubert 1 , Domenico Bosco 1 , Cristina Marzachì 2
Plant Pathology ( IF 2.3 ) Pub Date : 2020-10-21 , DOI: 10.1111/ppa.13301 Matteo Ripamonti 1, 2 , Mattia Pegoraro 2 , Cristina Morabito 1 , Ivana Gribaudo 2 , Andrea Schubert 1 , Domenico Bosco 1 , Cristina Marzachì 2
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The aim of this work was to evaluate the susceptibility to flavescence dorée (FD) of 12 Vitis vinifera cultivars grown in Piedmont, and representative of the wine‐making tradition of this area. The experiments were conducted under controlled conditions to ensure constant infection pressure. Test plants were ex vitro potted vines, singly inoculated with four Scaphoideus titanus infected by FD‐C phytoplasma (FDp), under greenhouse conditions. Vines were tested for FDp at 5 and 8 weeks postinoculation (wpi) and the phytoplasma load was measured in leaves and roots at 8 wpi. Within the 14 V. vinifera accessions (belonging to 12 cultivars), three susceptibility clusters were identified. Cultivars within the low susceptibility group showed low phytoplasma loads and low percentages of infected plants, suggesting a tolerant behaviour. To confirm these results, four Vitis cultivars, representing extremes of FD susceptibility from low to high, were grafted onto Kober 5BB rootstocks and inoculated with laboratory‐infected S. titanus, under semi‐field conditions. The transmission experiments onto grafted cuttings confirmed that susceptibility to the disease depends on the scion genotype. The data indicated that none of the tested V. vinifera genotypes are resistant to FD, although some cultivars with low susceptibility are available, and can be explored for identifying genetic traits involved in disease tolerance/resistance. Moreover, ranking Vitis genotypes for their susceptibility to FD is in itself a valuable tool to support vine growers in their decision management, by helping them to choose the most appropriate varieties according to their specific FD epidemiological contexts.
中文翻译：
来自意大利西北部的不同葡萄类型的葡萄对黄褐变的敏感性
这项工作的目的是评估在皮埃蒙特（Piedmont）种植的12种葡萄（Vitis vinifera）品种对黄度（FD）的敏感性，并代表该地区的酿酒传统。实验在受控条件下进行，以确保恒定的感染压力。测试植物是离体盆栽藤蔓植物，在温室条件下单独接种了四株被FD-C植原体（FDp）感染的Scaphoideus titanus。在接种后第5周和第8周测试葡萄藤的FDp，并在第8 wpi的叶子和根中测量植物的质体负荷。在14 V. vinifera中入种（属于12个品种），鉴定了三个易感性簇。低敏感性组中的品种显示出低的植物原浆负荷和低的被感染植物百分比，表明其具有宽容的行为。为了证实这些结果，将四个FD敏感性从低到高的极端葡萄品种移植到Kober 5BB砧木上，并用实验室感染的S接种。泰坦神庙，在半场条件下。嫁接插条上的传播实验证实，对疾病的敏感性取决于接穗的基因型。数据表明，没有一个测试的V。葡萄尽管有一些易感性低的品种，但基因型对FD具有抗性，并且可以用于鉴定与疾病耐受性/抗性有关的遗传性状。此外，对葡萄的基因型进行FD易感性排序本身就是一种有价值的工具，可通过帮助葡萄种植者根据其特定的FD流行病学背景选择最合适的品种来支持他们的决策管理。
更新日期：2020-10-21
中文翻译：
来自意大利西北部的不同葡萄类型的葡萄对黄褐变的敏感性
这项工作的目的是评估在皮埃蒙特（Piedmont）种植的12种葡萄（Vitis vinifera）品种对黄度（FD）的敏感性，并代表该地区的酿酒传统。实验在受控条件下进行，以确保恒定的感染压力。测试植物是离体盆栽藤蔓植物，在温室条件下单独接种了四株被FD-C植原体（FDp）感染的Scaphoideus titanus。在接种后第5周和第8周测试葡萄藤的FDp，并在第8 wpi的叶子和根中测量植物的质体负荷。在14 V. vinifera中入种（属于12个品种），鉴定了三个易感性簇。低敏感性组中的品种显示出低的植物原浆负荷和低的被感染植物百分比，表明其具有宽容的行为。为了证实这些结果，将四个FD敏感性从低到高的极端葡萄品种移植到Kober 5BB砧木上，并用实验室感染的S接种。泰坦神庙，在半场条件下。嫁接插条上的传播实验证实，对疾病的敏感性取决于接穗的基因型。数据表明，没有一个测试的V。葡萄尽管有一些易感性低的品种，但基因型对FD具有抗性，并且可以用于鉴定与疾病耐受性/抗性有关的遗传性状。此外，对葡萄的基因型进行FD易感性排序本身就是一种有价值的工具，可通过帮助葡萄种植者根据其特定的FD流行病学背景选择最合适的品种来支持他们的决策管理。
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