Sequence comparisons and phylogenetic analysis of the 165 rRNA genes and the 16S/23S spacer regions of the phytoplasmas associated with Australian grapevine yellows, papaya dieback and Phormium yellow leaf diseases revealed minimal nucleotide differences between them resulting in the formation of a monophyletic group. Therefore, along with Australian grapevine yellows, the phytoplasmas associated with Phormium yellow leaf and papaya dieback should also be considered as 'Candidatus Phytoplasma australiense'.
Liefting, L., Padovan, A., Gibb, K., Beever, R., Andersen, M., Newcomb, R., Beck, D., & Forster, R. (1998). 'Candidatus Phytoplasma australiense' is the phytoplasma associated with Australian grapevine yellows, papaya dieback and Phormium yellow leaf diseases. European Journal of Plant Pathology, 104(6), 619-623. https://doi.org/10.1023/A:1008693904427