RNA viruses and their silencing suppressors boost Abutilon mosaic virus, but not the Old World Tomato yellow leaf curl Sardinia virus

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• 作者：Luca  ; Sardo^a ; Christina  ; Wege^b ;   ; ^{christina.wege@bio.uni-stuttgart.de} ; Sigrid  ; Kober^b ; Conny  ; Kocher^b ; Gian Paolo  ; Accotto^a ; Emanuela  ; Noris^a ;   ; ^{e.noris@ivv.cnr.it}
• 关键词：Geminivirus ; Abutilon mosaic virus ; Tomato yellow leaf curl Sardinia virus ; Potyvirus ; Tombusvirus ; Mixed infection ; Synergism ; Tissue tropism ; Phloem ; Silencing suppression
• 刊名：Virus Research
• 出版年：2011
• 出版时间：November 2011
• 年：2011
• 卷：161
• 期：2
• 页码：170-180
• 全文大小：1739 K

文摘

Mixed viral infections can induce different changes in symptom development, genome accumulation and tissue tropism. These issues were investigated for two phloem-limited begomoviruses, Abutilon mosaic virus (AbMV) and Tomato yellow leaf curl Sardinia virus (TYLCSV) in Nicotiana benthamiana plants doubly infected by either the potyvirus Cowpea aphid-borne mosaic virus (CABMV) or the tombusvirus Artichoke mottled crinkle virus (AMCV). Both RNA viruses induced an increase of the amount of AbMV, led to its occasional egress from the phloem and induced symptom aggravation, while the amount and tissue tropism of TYLCSV were almost unaffected. In transgenic plants expressing the silencing suppressors of CABMV (HC-Pro) or AMCV (P19), AbMV was supported to a much lesser extent than in the mixed infections, with the effect of CABMV HC-Pro being superior to that of AMCV P19. Neither of the silencing suppressors influenced TYLCSV accumulation. These results demonstrate that begomoviruses differentially respond to the invasion of other viruses and to silencing suppression.