are not found in any other phytoplasmas belonging to other 16S-groups. In the RYD 16S-group, 59-TATCAGACTA-39 (626–635) is also conserved, with just two exceptions: SCWL and BVK phytoplasmas have T instead of C (629). Additionally, 59-AAATCTTCGGA- TTTT-39 (61–75) is conserved, except in the RYD isolates; both RYD-J