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首页> 外文期刊>Plant Disease >Blueberry necrotic ring blotch virus in Southern Highbush Blueberry: Insights into In Planta and In-Field Movement
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Blueberry necrotic ring blotch virus in Southern Highbush Blueberry: Insights into In Planta and In-Field Movement

机译：南部Highbush蓝莓中的蓝莓坏死环斑病毒：对植物体内和田间运动的认识

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Blueberry necrotic ring blotch virus (BNRBV) causes an emerging disease of southern highbush blueberry (SHB) in the southeastern United States. Disease incidence and severity vary considerably from year to year within the same planting. Experiments were conducted to determine how the virus spreads in the field. Leaf tissue from symptomatic field plants tested positive for BNRBV in 2011, whereas the same plants were asymptomatic in 2012 and tested negative for the virus. Symptomatic and asymptomatic leaves from individual shoots were tested for the presence of the virus, and symptomatic leaves tested positive (100%), whereas 65.4% of the asymptomatic leaves from the same shoots tested negative. Leaves were selected in which half the leaf blade was symptomatic and the other half was not; symptomatic leaf halves tested positive (100%), whereas 76.0% of the asymptomatic halves from the same leaf tested negative for the virus. When virus-free, potted trap plants were interspersed in the field among established plants that had shown disease symptoms the previous year, disease onset in trap plants was observed 2 to 3 weeks after disease onset in field plants. In a separate experiment, asymptomatic softwood cuttings were collected from mother plants symptomatic for BNRBV, rooted, and monitored for symptom development for a period of 12 to 27 months. No BNRBV symptoms were observed in the progeny, whereas disease incidence was high for cuttings taken at the same time from plants infected with Blueberry red ringspot virus used as a control. Collectively, these studies suggest that BNRBV does not infect SUB plants systemically and is not transmitted through vegetative propagation, and that the virus likely does not persist in plants after natural defoliation in the fall.
机译：蓝莓坏死环斑病毒（BNRBV）导致美国东南部南部高灌木蓝莓（SHB）的一种新兴疾病。在同一种植中，每年的疾病发生率和严重程度差异很大。进行实验以确定病毒如何在野外传播。有症状田间植物的叶片组织在2011年对BNRBV呈阳性反应，而同一植物在2012年无症状，对病毒呈阴性。测试了来自单个芽的有症状和无症状叶子是否存在病毒，有症状的叶子测试为阳性（100％），而来自相同芽的65.4％的无症状叶子测试为阴性。选择叶片，其中一半叶片有症状，另一半没有症状。有症状的半叶测试阳性（100％），而来自同一片叶子的76.0％的无症状半测试病毒为阴性。当将无病毒的盆栽诱集植物散布在田间的田间中，这些植株在前一年已表现出疾病症状的既有植物中，则在田间植物发病后2至3周观察到诱集植物的发病。在一个单独的实验中，从有症状的BNRBV母本植物中收集无症状的软木插条，生根，并监测症状发展，持续12到27个月。在子代中没有观察到BNRBV症状，而同时感染了蓝莓红环斑病毒的植物作为对照，从同时采摘的插条中发病率很高。总体而言，这些研究表明BNRBV不会全身感染SUB植物，也不会通过营养繁殖而传播，并且该病毒在秋季自然落叶后可能不会在植物中持续存在。

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