Zhao, Yan


Publications
24

Cas12a-Based Diagnostics for Potato Purple Top Disease Complex Associated with Infection by ‘Candidatus Phytoplasma trifolii’-Related Strains

Citation
Wheatley et al. (2022). Plant Disease 106 (8)
Names
Ca. Phytoplasma trifolii
Abstract
‘Candidatus Phytoplasma trifolii’ is a cell wall-less phytopathogenic bacterium that infects many agriculturally important plant species such as alfalfa, clover, eggplant, pepper, potato, and tomato. The phytoplasma is responsible for repeated outbreaks of potato purple top (PPT) and potato witches’ broom (PWB) that occurred along the Pacific Coast of the United States since 2002, inflicting significant economic losses. To effectively manage these phytoplasmal diseases, it is important to devel

Candidatus Phytoplasma pini (pine witches'-broom phytoplasma)

Citation
Davis, Zhao (2021).
Names
Ca. Phytoplasma pini
Abstract
Abstract 'Ca. Phytoplasma pini' is a member of phytoplasma 16S rRNA gene RFLP group XXI, subgroup XXI-A. It has been identified in a number of European countries, including Germany, Poland, Lithuania, Spain, Czech Republic and Croatia. Outside of Europe it has been identified in China and Mozambique. A related strain has also been identified in Maryland, USA. In the USA, favourable climatic conditions and wide availability of potential host plants of the phytoplasma, suggest that the pot

Candidatus Phytoplasma trifolii (clover proliferation phytoplasma)

Citation
Zhao, Wei (2021).
Names
Ca. Phytoplasma trifolii
Abstract
Abstract The reference strain of 'Ca. Phytoplasma trifolii' is the causative agent of clover proliferation (CP) disease of alsike clover (Trifolium hybridum). The CP disease was first reported in Canada in the early 1960s when the aetiological agent was mistakenly presumed to be a yellows-type virus (Chiykowski, 1965). Subsequent investigations revealed that the disease was associated with infection by a mycoplasma-like organism (Chen and Hiruki, 1975>; Hiruki and Chen, 1984), now ter

Candidatus Phytoplasma ulmi (elm yellows)

Citation
Zhao, Wei (2021).
Names
Ca. Phytoplasma ulmi
Abstract
Abstract Elm yellows develops in sporadic epidemics after introduction of 'Ca. Phytoplasma ulmi' to areas where vectors are abundant.

Candidatus Phytoplasma pini (pine witches'-broom phytoplasma)

Citation
Davis, Zhao (2021).
Names
Ca. Phytoplasma pini
Abstract
Abstract 'Ca. Phytoplasma pini' is a member of phytoplasma 16S rRNA gene RFLP group XXI, subgroup XXI-A. It has been identified in a number of European countries, including Germany, Poland, Lithuania, Spain, Czech Republic and Croatia. Outside of Europe it has been identified in China and Mozambique. A related strain has also been identified in Maryland, USA. In the USA, favourable climatic conditions and wide availability of potential host plants of the phytoplasma, suggest that the pot

Candidatus Phytoplasma trifolii (clover proliferation phytoplasma)

Citation
Zhao, Wei (2021).
Names
Ca. Phytoplasma trifolii
Abstract
Abstract The reference strain of 'Ca. Phytoplasma trifolii' is the causative agent of clover proliferation (CP) disease of alsike clover (Trifolium hybridum). The CP disease was first reported in Canada in the early 1960s when the aetiological agent was mistakenly presumed to be a yellows-type virus (Chiykowski, 1965). Subsequent investigations revealed that the disease was associated with infection by a mycoplasma-like organism (Chen and Hiruki, 1975; Hiruki and Chen, 1984), now termed

The agent associated with blue dwarf disease in wheat represents a new phytoplasma taxon, ‘Candidatus Phytoplasma tritici’

Citation
Zhao et al. (2021). International Journal of Systematic and Evolutionary Microbiology 71 (1)
Names
Ca. Phytoplasma tritici Ca. Phytoplasma asteris
Abstract
Wheat blue dwarf (WBD) is one of the most economically damaging cereal crop diseases in northwestern PR China. The agent associated with the WBD disease is a phytoplasma affiliated with the aster yellows (AY) group, subgroup C (16SrI-C). Since phytoplasma strains within the AY group are ecologically and genetically diverse, it has been conceived that the AY phytoplasma group may consist of more than one species. This communication presents evidence to demonstrate that, while each of the two 16 r