Zhao, Y.


Publications
20

First Report of Sweet Cherry Virescence Disease in China and Its Association with Infection by a ‘Candidatus Phytoplasma ziziphi’-Related Strain

Citation
Wang et al. (2014). Plant Disease 98 (3)
Names
Ca. Phytoplasma ziziphi
Abstract
Sweet cherry (Prunus avium L.) is a deciduous tree originating in the Black Sea/Caspian Sea region where Asia and Europe converge. Being highly valued for its timber and fruit, sweet cherry has been cultivated and naturalized on all continents. Over the past decade, the area of sweet cherry cultivation increased rapidly in China and has reached 140,000 ha. In April 2013, sweet cherry trees (cv. Summit) exhibiting floral virescence symptoms were observed in two orchards located in suburban Taian

‘ Candidatus Phytoplasma solani’, a novel taxon associated with stolbur- and bois noir-related diseases of plants

Citation
Quaglino et al. (2013). International Journal of Systematic and Evolutionary Microbiology 63 (Pt_8)
Names
Ca. Phytoplasma solani
Abstract
Phytoplasmas classified in group 16SrXII infect a wide range of plants and are transmitted by polyphagous planthoppers of the family Cixiidae. Based on 16S rRNA gene sequence identity and biological properties, group 16SrXII encompasses several species, including ‘Candidatus Phytoplasma australiense ’, ‘Candidatus Phytoplasma japonicum ’ and ‘Candidatus

‘Candidatus Phytoplasma malaysianum’, a novel taxon associated with virescence and phyllody of Madagascar periwinkle (Catharanthus roseus)

Citation
Nejat et al. (2013). International Journal of Systematic and Evolutionary Microbiology 63 (Pt_2)
Names
Ca. Phytoplasma malaysianum
Abstract
This study addressed the taxonomic position and group classification of a phytoplasma responsible for virescence and phyllody symptoms in naturally diseased Madagascar periwinkle plants in western Malaysia. Unique regions in the 16S rRNA gene from the Malaysian periwinkle virescence (MaPV) phytoplasma distinguished the phytoplasma from all previously described ‘ Candidatus

‘Candidatus Phytoplasma pruni’, a novel taxon associated with X-disease of stone fruits, Prunus spp.: multilocus characterization based on 16S rRNA, secY, and ribosomal protein genes

Citation
Davis et al. (2013). International Journal of Systematic and Evolutionary Microbiology 63 (Pt_2)
Names
Ca. Phytoplasma pruni
Abstract
X-disease is one of the most serious diseases known in peach (Prunus persica). Based on RFLP analysis of 16S rRNA gene sequences, peach X-disease phytoplasma strains from eastern and western United States and eastern Canada were classified in 16S rRNA gene RFLP group 16SrIII, subgroup A. Phylogenetic analyses of 16S rRNA gene sequences revealed that the X-disease phytoplasma strains formed a distinct subclade within the phytoplasma clade, supporting the hypothesis that they represented a lineage

‘Candidatus Phytoplasma sudamericanum’, a novel taxon, and strain PassWB-Br4, a new subgroup 16SrIII-V phytoplasma, from diseased passion fruit (Passiflora edulis f. flavicarpa Deg.)

Citation
Davis et al. (2012). International Journal of Systematic and Evolutionary Microbiology 62 (Pt_4)
Names
Ca. Phytoplasma sudamericanum
Abstract
Symptoms of abnormal proliferation of shoots resulting in formation of witches’-broom growths were observed on diseased plants of passion fruit (Passiflora edulis f. flavicarpa Deg.) in Brazil. RFLP analysis of 16S rRNA gene sequences amplified in PCRs containing template DNAs extracted from diseased plants collected in Bonito (Pernambuco) and Viçosa (Minas Gerais) Brazil, indicated that such symptoms were associated with infections by two mutually distinct phytoplasmas. One phytoplasma, PassWB-

‘Candidatus Phytoplasma costaricanum’ a novel phytoplasma associated with an emerging disease in soybean (Glycine max)

Citation
Lee et al. (2011). International Journal of Systematic and Evolutionary Microbiology 61 (12)
Names
Ca. Phytoplasma costaricanum
Abstract
A novel phytoplasma, designated strain SoyST1c1, associated with a newly emerging disease in soybean (Glycine max), known as soybean stunt (SoyST), was found in 2002 in a soybean plantation in Alajuela Province, Costa Rica. The same phytoplasma, or a very closely related strain, also infected sweet pepper (Capsicum annuum) with purple vein syndrome (SwPPV) and passion fruit vine (Passiflora edulis) with bud proliferation disease (PasFBP) in the same region. Sequence analysis of cloned 16S rRNA g

First Report of a Natural Infection of Opuntia sp. by a ‘Candidatus Phytoplasma asteris’-Related Phytoplasma in China

Citation
Wei et al. (2007). Plant Disease 91 (4)
Names
Ca. Phytoplasma asteris
Abstract
Cacti (Opuntia spp.) are perennial, evergreen, succulent plants native to arid areas of the Americas. Because of their aesthetic appearance, many cacti have been cultivated and introduced to other parts of the world as ornamentals. Cacti are susceptible to phytoplasma infections and develop witches'-broom (WB) disease. Currently, all reported cactus WB cases are associated with infections by phytoplasmas in the peanut witches'-broom group (16SrII) (1,2,4). During a phytoplasma diversity survey

Phylogenetic positions of ‘Candidatus Phytoplasma asteris' and Spiroplasma kunkelii as inferred from multiple sets of concatenated core housekeeping proteins

Citation
Zhao et al. (2005). International Journal of Systematic and Evolutionary Microbiology 55 (5)
Names
Ca. Phytoplasma asteris
Abstract
Phytopathogenic mollicutes, which include spiroplasmas and phytoplasmas, are cell wall-less bacteria that parasitize plant hosts and insect vectors. Knowledge of the evolution of these agents is important in understanding their biology. The availability of the first complete phytoplasma and several partial spiroplasma and phytoplasma genome sequences made possible an investigation of evolutionary relationships between phytopathogenic mollicutes and other micro-organisms, especially Gram-positive