Detection and analysis of endogenous badnaviruses in the New Zealand flora

Research reveals that more than half of the New Zealand flora, including 37 out of 60 species studied, harbors endogenous badnavirus reverse transcriptase (RT) sequences. Unlike tropical regions where freely replicating badnaviruses are common, no active viruses were detected in this temperate Southern Hemisphere flora. Phylogenetic analysis showed that these RT sequences form distinct monophyletic groups, suggesting they may be widespread in temperate plant species. The study also identified a previously unrecognized Melicytus species and hinted at potential apomixis—a form of asexual reproduction—in Melicytus ramiflorus. These findings highlight the broader presence of integrated badnavirus sequences in temperate regions and caution about their potential activation under stress, such as tissue culture or genomic manipulation.

Lyttle, D. J., Orlovich, D. A., & Guy, P. L. (2011). Detection and analysis of endogenous badnaviruses in the New Zealand flora. AoB Plants, 2011(0), plr008–plr008. https://doi.org/10.1093/aobpla/plr008