Abstract
East Asian Passiflora virus (EAPV) and East Asian Passiflora distortion virus (EAPDV), members of the potyvirus genus, infect passionfruit (Passiflora edulis × P. edulis f. flavicarpa). We found EAPV and EAPDV coinfecting passionfruit in Okinawa Prefecture, Japan and here investigated the effects of coinfection with those viruses on P. foetida, a wild passionfruit. Coinfection with EAPV and EAPDV resulted in different symptoms and viral titers in P. foetida. Mixed inoculation (EAPV + EAPDV) and inoculation with EAPV and 6 days later with EAPDV (EAPV → EAPDV) caused the most severe leaf symptoms at 28 dpi, whereas inoculation with EAPDV then EAPV (EAPDV → EAPV) induced milder symptoms. Single infection with EAPDV caused the mildest symptoms. Quantitative analysis revealed that the log10 of EAPDV titer in EAPDV → EAPV, EAPV → EAPDV, and D + A, was 1.85-, 1.52-, and 1.56-fold higher, respectively, than after a single infection with EAPDV. EAPV titer was always lower than the EAPDV titer. In short, EAPV induced EAPDV propagation, and P. foetida is a potential reservoir for EAPV and EAPDV.
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The authors gratefully acknowledge support from the JSPS KAKENHI Grant Number 16K07620 and from World Bank Funds regulated by the Indonesian Agency of Agriculture Research and Development (IAARD).
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Riska, Nakamura, M. & Iwai, H. Effects of coinfection with East Asian Passiflora virus and East Asian Passiflora distortion virus on Passiflora foetida. J Gen Plant Pathol 86, 211–218 (2020). https://doi.org/10.1007/s10327-020-00913-7
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DOI: https://doi.org/10.1007/s10327-020-00913-7