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A new phytoplasma associated with witches’‐broom on Japanese maple in China

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Abstract:

Summary

In September 2011, five Japanese maple (Acer palmatum Thunb.) trees with symptoms of witches’‐broom were observed growing near each other at a maple grove in Northwest A&F University, Yangling, Shaanxi Province, China. Pleomorphic phytoplasma‐like bodies were observed in the phloem sieve tube elements of symptomatic plants under transmission electron microscope (TEM). The presence of phytoplasma was further confirmed by a nested polymerase chain reaction (PCR), which amplified a 1.2‐kb fragment using universal primer pair R16mF2/R16mR1 followed by further amplification using primer pair R16F2n/R16R2. Phylogenetic analysis and gel‐based restriction fragment length polymorphism (RFLP) analysis demonstrated that the Japanese maple witches’‐broom was associated with phytoplasma belonging to subgroup 16SrI‐D. This is the first report of a phytoplasma disease of Japanese maple.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1439-0329.2012.00769.x

Affiliations: 1: State Key Laboratory of Crop Stress Biology for Arid Areas and Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China 2: College of Forestry, Northwest A&F University, Yangling, Shaanxi, China 3: State Key Laboratory of Crop Stress Biology for Arid Areas and Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China

Publication date: October 1, 2012

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