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United States Department of Agriculture

Agricultural Research Service

Yan Zhao

Research Molecular Biologist

  Dr. Zhao

Dr. Yan Zhao

Research Molecular Biologist
Phone: (301)-504-6202

New knowledge derived from genome information is critical for developing novel strategies to combat plant diseases caused by spiroplasmas and phytoplasmas.

One of our research objectives is, through genome annotation and cross-genomic comparison, to understand the molecular basis of spiroplasma/phytoplasma pathogenesis and to identify genes involved in pathogen-host interactions.

Our research is also devoted to development and use of Agrobacterium-mediated stable transformation and viral vector-mediated transient expression technologies for genetic engineering of disease-resistant plants.


phytoplasma phage image

Three types of prophage genomes, Ph??w, Ph??z, and Ph??wz, integrated in the chromosome of
' Candidatus Phytoplasma asteris'-related strain OYM (Wei et al. Proc Natl Acad Sci USA 2008 105, 11827-11832)


Virtual Gel RFLP Analysis

Click on image to visit virtual gel website
Virtual RFLP analysis for rapid phytoplasma classification (Wei et al. Int J Syst Evol Microbiol 2007 57, 1855-1867; 2008 58, 2368-2377)



ATP-binding cassette proteins in Spiroplasma kunkelii 


ATP-binding cassette proteins and their predicted functions in Spiroplasma kunkelii (Zhao et al. Mol Genet Genomics 2004 271, 325-338)



Phloem-specific expression of marker genes

Phloem-specific expression of marker genes in transgenic cherry (left) and strawberry (right) plants (Zhao et al.Plant Cell Rep 2004 23, 224-230)


Last Modified: 8/12/2016
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