Abstract
AbstractOrnamental plants of Celosia argentea L. and Celosia spicata L. displaying typical phytoplasma‐induced symptoms were observed in Piracicaba, State of São Paulo, south‐eastern Brazil. Our aim was to identify the possible phytoplasma involved. PCR revealed the association of phytoplasma with diseased plants of both species. Based on actual and virtual RFLP analysis and phylogenetic analysis, the phytoplasma was characterized as a member of the 16SrIII‐J subgroup. Transmission of the pathogen by dodder supported the evidence that the symptoms observed in naturally diseased plants were induced by a phytoplasma. Our results show that C. spicata is a new host for phytoplasma and that this is the first report of a 16SrXIII‐J phytoplasma infecting plants of C. argentea and C. spicata in Brazil.
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