Staygreen syndrome or Zhengqing in soybean has recently become a major issue for Chinese growers in the Huang-Huai-Hai river basin.Although previous studies revealed that staygreen can be induced when pods/seeds are d...Staygreen syndrome or Zhengqing in soybean has recently become a major issue for Chinese growers in the Huang-Huai-Hai river basin.Although previous studies revealed that staygreen can be induced when pods/seeds are damaged, it is unknown whether virus infection or insect infestation causes staygreen.To determine whether viral infection causes staygreen, a survey of soybean staygreen incidence in the Huang-Huai-Hai river basin was conducted in 2016 and 2017.Diseased samples were collected and analyzed using DAS-ELISA for Soybean mosaic virus, Watermelon mosaic virus, Bean pod mottle virus, Cucumber mosaic virus, and Bean common mosaic virus.The survey showed that the severity of soybean staygreen syndrome was most prevalent in Beijing, Henan, Shaanxi, and some parts of Shandong provinces, with yield losses from 0 to nearly 100%, but only a small fraction of samples were positive for the tested viruses.A field cage experiment and an insecticide treatment field trial were conducted to determine the contribution of the bean bug, Riptortus pedestris, to staygreen incidence.The field cage experiment showed that R.pedestris treatment resulted in shorter plants, more empty pods, increased numbers of abnormal seeds, and decreased yields.The field experiment showed that there were fewer R.pedestris and less soybean staygreen incidence in fields treated with insecticide than in untreated control fields.Together, these results suggest that R.pedestris infestation rather than virus infection induces staygreen syndrome and that growers in this region can mitigate staygreen syndrome via bean bug control.展开更多
【研究目的】黄瓜绿斑驳花叶病毒(Cucumber green mottle mosaic virus,CGMMV)的快速鉴定检测是控制该潜在危险性有害生物蔓延的有效途径。【方法】通过汁液摩擦接种、透射电镜观察、双抗夹心酶联免疫吸附测定法(DAS-ELISA)和RT-PCR方...【研究目的】黄瓜绿斑驳花叶病毒(Cucumber green mottle mosaic virus,CGMMV)的快速鉴定检测是控制该潜在危险性有害生物蔓延的有效途径。【方法】通过汁液摩擦接种、透射电镜观察、双抗夹心酶联免疫吸附测定法(DAS-ELISA)和RT-PCR方法对该病毒进行鉴定;同时对RT-PCR反应体系及扩增程序进行优化,建立CGMMV免疫捕获RT-PCR(IC-RT-PCR)检测方法。【结果】血清学、生物学、电镜观察和分子生物学方法证明供试样本为黄瓜绿斑驳花叶病毒引致。IC-RT-PCR方法可以简化RNA的提取,降低对试验材料要求。【结论】IC-RT-PCR的建立为CGMMV的检测提供了操作更为简便、特异性更强的快速、准确的检测方法。展开更多
从日本引进的西瓜种子隔离种植后,采用生物学、双抗体夹心酶联方法及反转录PCR(RT-PCR)技术对其幼苗样品进行了黄瓜绿斑驳花叶病毒(Cucumber green mottle mosaic virus,CGMMV)的检测,结果表明:生物学试验接种的黄瓜健康植株全部发病;...从日本引进的西瓜种子隔离种植后,采用生物学、双抗体夹心酶联方法及反转录PCR(RT-PCR)技术对其幼苗样品进行了黄瓜绿斑驳花叶病毒(Cucumber green mottle mosaic virus,CGMMV)的检测,结果表明:生物学试验接种的黄瓜健康植株全部发病;双抗体夹心酶联试验结果均为阳性;RT-PCR反应后进行1%琼脂糖凝胶电泳检测,结果出现预期的715 bp特异性扩增产物。3种方法均表明此次从日本引进的西瓜种质已经受到黄瓜绿斑驳花叶病毒的侵染,须做销毁处理。试验结果表明,采用3种方法中的2种对样品进行检测,即可以根据检测结果确诊被检对象是否带有CGMMV病毒。展开更多
基金supported by the National Key Research and Development Program of China (2017YFD0101400) to T.HanChina Agriculture Research System (CARS-04) to T.Han and K.Li
文摘Staygreen syndrome or Zhengqing in soybean has recently become a major issue for Chinese growers in the Huang-Huai-Hai river basin.Although previous studies revealed that staygreen can be induced when pods/seeds are damaged, it is unknown whether virus infection or insect infestation causes staygreen.To determine whether viral infection causes staygreen, a survey of soybean staygreen incidence in the Huang-Huai-Hai river basin was conducted in 2016 and 2017.Diseased samples were collected and analyzed using DAS-ELISA for Soybean mosaic virus, Watermelon mosaic virus, Bean pod mottle virus, Cucumber mosaic virus, and Bean common mosaic virus.The survey showed that the severity of soybean staygreen syndrome was most prevalent in Beijing, Henan, Shaanxi, and some parts of Shandong provinces, with yield losses from 0 to nearly 100%, but only a small fraction of samples were positive for the tested viruses.A field cage experiment and an insecticide treatment field trial were conducted to determine the contribution of the bean bug, Riptortus pedestris, to staygreen incidence.The field cage experiment showed that R.pedestris treatment resulted in shorter plants, more empty pods, increased numbers of abnormal seeds, and decreased yields.The field experiment showed that there were fewer R.pedestris and less soybean staygreen incidence in fields treated with insecticide than in untreated control fields.Together, these results suggest that R.pedestris infestation rather than virus infection induces staygreen syndrome and that growers in this region can mitigate staygreen syndrome via bean bug control.
文摘【研究目的】黄瓜绿斑驳花叶病毒(Cucumber green mottle mosaic virus,CGMMV)的快速鉴定检测是控制该潜在危险性有害生物蔓延的有效途径。【方法】通过汁液摩擦接种、透射电镜观察、双抗夹心酶联免疫吸附测定法(DAS-ELISA)和RT-PCR方法对该病毒进行鉴定;同时对RT-PCR反应体系及扩增程序进行优化,建立CGMMV免疫捕获RT-PCR(IC-RT-PCR)检测方法。【结果】血清学、生物学、电镜观察和分子生物学方法证明供试样本为黄瓜绿斑驳花叶病毒引致。IC-RT-PCR方法可以简化RNA的提取,降低对试验材料要求。【结论】IC-RT-PCR的建立为CGMMV的检测提供了操作更为简便、特异性更强的快速、准确的检测方法。
