First look into the genome sequence of ‘Candidatus Phytoplasma mali’ in comparison to ‘Candidatus Phytoplasma asteris’ strains OY-M and AY-WB

The genome of ‘Candidatus Phytoplasma mali’ (strain AT) was determined, it represents the smallest phytoplasma genome sequenced so far. As in the other phytoplasmas, the metabolic capabilities are strongly reduced and reflect the gene repertoire of a parasitic organism. The chromosome is characterized by large repetitive elements and a low content of minor repeats. Preliminary comparative analyses of the genome of ‘Ca. P. mali’ (strain AT) clearly indicate a distinct position and probably a higher level of genome reduction compared to the aster yellows phytoplasmas.