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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2016.8
- 수록면
- 321 - 328 (8page)
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We examined the effects of temperature on acquisition of Potato virus Y-O (PVY-O), Potato virus A (PVA), and Potato leafroll virus (PLRV) by Myzus persicae by performing transmission tests with aphids that ac-quired each virus at different temperatures. Infection by PVY-O/PVA and PLRV increased with increasing plant temperature in Nicotiana benthamiana and Phy-salis floridana, respectively, after being transmitted by aphids that acquired them within a temperature range of 10-20℃. However, infection rates subsequently decreased. Direct qRT-PCR of RNA extracted from a single aphid showed that PLRV infection increased in the 10-20℃ range, but this trend also declined shortly thereafter. We examined the effect of temperature on establishment of virus infection. The greatest number of plants became infected when N. benthamiana was held at 20℃ after inoculation with PVY-O or PVA. The largest number of P. floridana plants became in-fected with PLRV when the plants were maintained at 25℃. PLRV levels were highest in P. floridana kept at 20-25℃. These results indicate that the optimum temperatures for proliferation of PVY-O/PVA and PLRV differed. Western blot analysis showed that ac-cumulations of PVY-O and PVA coat proteins (CPs) were lower at 10℃ or 15℃ than at 20℃ during early infection. However, accumulation increased over time. At 25℃ or 30℃, the CPs of both viruses accumulated during early infection but disappeared as time passed. Our results suggest that symptom attenuation and re-duction of PVY-O and PVA CP accumulation at higher temperatures appear to be attributable to increased RNA silencing.
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