Molecular detection of Jujube witches' broom phytoplasmas in micropropagated Jujube shoots

文献类型: 外文期刊

第一作者: Tian, JB

作者: Tian, JB;Guo, HP;Bertaccini, A;Martini, M;Paltrinieri, S;Pastore, M

作者机构:

关键词: nested PCR;RFLP analyses;disease;Zizyphus jujuba

期刊名称:HORTSCIENCE ( 影响因子:1.455; 五年影响因子:1.617 )

ISSN: 0018-5345

年卷期: 2000 年 35 卷 7 期

页码:

收录情况: SCI

摘要: Jujube (Zizyphus jujuba Mill.) witches' broom (JWB) is the most important disease in the areas of jujube cultivation in China, where it occurs every year, Micropropagated shoots of the three most important cultivars ('Lizao', 'Junzao', and 'Muzao') in the National Jujube Gene Pool, collected at the Pomology Institute of Shanxi province, were tested for the presence of phytoplasmas. Phytoplasma ribosomal (16Sr) general and specific primer pairs were used in direct or nested polymerase chain reaction (PCR), Positive results were obtained only from symptomatic micropropagated samples of 'Lizao' and from phytoplasma controls. Restriction fragment length polymorphism (RFLP) analyses of PCR products with several restriction enzymes revealed that the phytoplasmas infecting the symptomatic plants belong to the 16SrRNA group V subgroup B. The positive correlation between symptoms and the presence of phytoplasmas was verified in tissue culture. Samples from apparently healthy shoots of 'Junzao','Muzao', and 'Lizao' were free of phytoplasmas.

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