Abstract
AbstractTree peony (Paeonia suffruticosais) plants with yellowing symptoms suggestive of a phytoplasma disease were observed in Shandong Peninsula, China. Typical phytoplasma bodies were detected in the phloem tissue using transmission electron microscopy. The association of a phytoplasma with the disease was confirmed by polymerase chain reaction (PCR) using phytoplasma universal primer pair R16mF2/R16mR1 followed by R16F2n/R16R2 as nested PCR primer pair. The sequence analysis indicated that the phytoplasma associated with tree peony yellows (TPY) was an isolate of ‘Ca. Phytoplasma solani’ belonging to the stolbur (16SrXII) group. This is the first report of a phytoplasma associated with tree peony.
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