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Title: EVIDENCE THAT "FRAGARIA MULTICIPITA" IS A PHYTOPLASMA-DISEASED FRAGARIA

Author
item Jomantiene, Rasa
item Davis, Robert
item Dally, Ellen
item Maas, John
item Postman, Joseph

Submitted to: American Phytopathological Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 11/17/1997
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: The rare plant Fragaria multicipita, first reported in 1908 and thought to be extinct until its rediscovery in 1992, was characterized by a dwarfed, multi-crowned growth habit. Graft transmission of the growth form from F. multicipita to E. chiloensis led to the suggestion (by others) that F. multicipita was a diseased form of F. virginiana, and to the reduction of F. multicipita to the taxonomic rank of forma. Using polymerase chain reactions, we amplified phytoplasma-specific 16S rDNA sequences from E. multicipita and grafted F. chiloensis. RFLP analysis of the amplified DNAs indicated that these plants were infected by a phytoplasma belonging to 16S rRNA gene group 16SrVI (clover proliferation, potato witches' broom, and related phytoplasmas), and that the phytoplasma represented a distinct new subgroup, which we designate 16SrVI-B. Based on these findings, we suggest that "F. multicipita" is an aberrant growth form induced by phytoplasmal infection.