Abstract
AbstractIn 2010, tomato plants with big bud symptoms were observed in Xinjiang, China. PCR products of approximately 1.2 and 2.8 kb were amplified from infected tomato tissues but not from asymptomatic plants. A comparison of 16S rDNA sequences showed that the casual tomato big bud (TBB) phytoplasma was closely (99%) related to the ‘Candidatus Phytoplasma trifolii’ (16SrVI group). The TBB phytoplasma clustered into one branch with the Loofah witches'‐broom phytoplasma according to the 23S rDNA analysis but with no other member of the 16SrVI group. The cause of TBB symptoms was identified as ‘Ca. Phytoplasma trifolii' (16SrVI group) by PCR, virtual RFLP and sequencing analyses. This is the first report of a phytoplasma related to ‘Ca. Phytoplasma trifolii' causing TBB disease in China.
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