Citrus viroids are the small but economically important RNA pathogens. For investigating their occurrence and distribution in China, 65 viroid samples collected from 8 major citrus cultivated regions were evaluated us...Citrus viroids are the small but economically important RNA pathogens. For investigating their occurrence and distribution in China, 65 viroid samples collected from 8 major citrus cultivated regions were evaluated using one-step or multiplex onestep RT-PCR and biological indexing for specifically detection of Citrus exocortis viroid （CEVd）, Citrus bent leaf viroid （CBLVd）, Hop stunt viroid （HSVd）, Citrus viroid-Ⅲ （CVd-Ⅲ） and Citrus viroid-Ⅳ （CVd-Ⅳ）. The results showed that there were at least 4 kinds of citrus viroids （CEVd, CBLVd, HSVd, and CVd-Ⅲ） on citrus trees in China. Most of the infected citrus plants harbored more than one viroid species, and two plants were infected with up to 4 citrus viroids. Sweet orange was more frequently infected by viroids than other citrus varieties. It is the preliminary report on the species and distribution of citrus viroids in China.展开更多
用双向聚丙烯酰胺凝胶电泳—银染法对爪哇三七(Gynura aurantioca, D. C.)进行生化分析,发现在健康爪哇三七细胞质中有一种闭环RNA(Cytoplasmic small circular RNA,简称cscRNA),它的电泳行为与柑桔裂皮病类病毒(CitruS Exocortis Viro...用双向聚丙烯酰胺凝胶电泳—银染法对爪哇三七(Gynura aurantioca, D. C.)进行生化分析,发现在健康爪哇三七细胞质中有一种闭环RNA(Cytoplasmic small circular RNA,简称cscRNA),它的电泳行为与柑桔裂皮病类病毒(CitruS Exocortis Viroid,简称CEV)相似,而点杂交结果显示它的一级结构与类病毒RNA的中心保守区核酸序列没有同源性。进一步分析细胞不同组分的RNA,发现cscRNA仅存在于细胞质中,并与季节的变化有密切关系。在CEV感染的爪哇三七细胞中,可测出CEV-RNA和cscRNA两种闭环RNA分子,但细胞核内仅能检出CEV-RNA一种分子,它与类病毒的中心保守区有明显的同源性。检测CEV感染时,可用细胞核RNA进行测定,以排除细胞质小分子闭环RNA的干扰。展开更多
基金the National Key Technology R&D Program of China (2007BAD61B04)the National Natural Science Foundation of CQ CSTC, China (2006BB1351)
文摘Citrus viroids are the small but economically important RNA pathogens. For investigating their occurrence and distribution in China, 65 viroid samples collected from 8 major citrus cultivated regions were evaluated using one-step or multiplex onestep RT-PCR and biological indexing for specifically detection of Citrus exocortis viroid （CEVd）, Citrus bent leaf viroid （CBLVd）, Hop stunt viroid （HSVd）, Citrus viroid-Ⅲ （CVd-Ⅲ） and Citrus viroid-Ⅳ （CVd-Ⅳ）. The results showed that there were at least 4 kinds of citrus viroids （CEVd, CBLVd, HSVd, and CVd-Ⅲ） on citrus trees in China. Most of the infected citrus plants harbored more than one viroid species, and two plants were infected with up to 4 citrus viroids. Sweet orange was more frequently infected by viroids than other citrus varieties. It is the preliminary report on the species and distribution of citrus viroids in China.
文摘用双向聚丙烯酰胺凝胶电泳—银染法对爪哇三七(Gynura aurantioca, D. C.)进行生化分析,发现在健康爪哇三七细胞质中有一种闭环RNA(Cytoplasmic small circular RNA,简称cscRNA),它的电泳行为与柑桔裂皮病类病毒(CitruS Exocortis Viroid,简称CEV)相似,而点杂交结果显示它的一级结构与类病毒RNA的中心保守区核酸序列没有同源性。进一步分析细胞不同组分的RNA,发现cscRNA仅存在于细胞质中,并与季节的变化有密切关系。在CEV感染的爪哇三七细胞中,可测出CEV-RNA和cscRNA两种闭环RNA分子,但细胞核内仅能检出CEV-RNA一种分子,它与类病毒的中心保守区有明显的同源性。检测CEV感染时,可用细胞核RNA进行测定,以排除细胞质小分子闭环RNA的干扰。
