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Qin C, Li B, Fan Y, Zhang X, Yu Z, Ryabov E, Zhao M, Wang H, Shi N, Zhang P, Jackson S, Tör M, Cheng Q, Liu Y, Gallusci P, Hong Y. Roles of Dicer-Like Proteins 2 and 4 in Intra- and Intercellular Antiviral Silencing. PLANT PHYSIOLOGY 2017; 174:1067-1081. [PMID: 28455401 PMCID: PMC5462052 DOI: 10.1104/pp.17.00475] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 04/26/2017] [Indexed: 05/23/2023]
Abstract
RNA silencing is an innate antiviral mechanism conserved in organisms across kingdoms. Such a cellular defense involves DICER or DICER-LIKEs (DCLs) that process plant virus RNAs into viral small interfering RNAs (vsiRNAs). Plants encode four DCLs that play diverse roles in cell-autonomous intracellular virus-induced RNA silencing (known as VIGS) against viral invasion. VIGS can spread between cells. However, the genetic basis and involvement of vsiRNAs in non-cell-autonomous intercellular VIGS remains poorly understood. Using GFP as a reporter gene together with a suite of DCL RNAi transgenic lines, here we show that despite the well-established activities of DCLs in intracellular VIGS and vsiRNA biogenesis, DCL4 acts to inhibit intercellular VIGS whereas DCL2 is required (likely along with DCL2-processed/dependent vsiRNAs and their precursor RNAs) for efficient intercellular VIGS trafficking from epidermal to adjacent cells. DCL4 imposed an epistatic effect on DCL2 to impede cell-to-cell spread of VIGS. Our results reveal previously unknown functions for DCL2 and DCL4 that may form a dual defensive frontline for intra- and intercellular silencing to double-protect cells from virus infection in Nicotiana benthamiana.
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Affiliation(s)
- Cheng Qin
- Research Centre for Plant RNA Signaling, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China (C.Q., B.L., Y.F., X.Z., Z.Y., E.R., M.Z., H.W., N.S., P.C., Y.H.)
- Warwick-Hangzhou RNA Signalling Joint Laboratory, School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom (E.R., S.J., Y.H.)
- Institute of Science and the Environment, University of Worcester, Worcester WR2 6AJ, United Kingdom (M.T.)
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China (Q.C.)
- MOE Key Laboratory of Bioinformatics, Centre for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China (Y.L.); and
- UMR EGFV, Bordeaux Sciences Agro, INRA, Université de Bordeaux, 210 Chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France (P.G.)
| | - Bin Li
- Research Centre for Plant RNA Signaling, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China (C.Q., B.L., Y.F., X.Z., Z.Y., E.R., M.Z., H.W., N.S., P.C., Y.H.)
- Warwick-Hangzhou RNA Signalling Joint Laboratory, School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom (E.R., S.J., Y.H.)
- Institute of Science and the Environment, University of Worcester, Worcester WR2 6AJ, United Kingdom (M.T.)
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China (Q.C.)
- MOE Key Laboratory of Bioinformatics, Centre for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China (Y.L.); and
- UMR EGFV, Bordeaux Sciences Agro, INRA, Université de Bordeaux, 210 Chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France (P.G.)
| | - Yaya Fan
- Research Centre for Plant RNA Signaling, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China (C.Q., B.L., Y.F., X.Z., Z.Y., E.R., M.Z., H.W., N.S., P.C., Y.H.)
- Warwick-Hangzhou RNA Signalling Joint Laboratory, School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom (E.R., S.J., Y.H.)
- Institute of Science and the Environment, University of Worcester, Worcester WR2 6AJ, United Kingdom (M.T.)
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China (Q.C.)
- MOE Key Laboratory of Bioinformatics, Centre for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China (Y.L.); and
- UMR EGFV, Bordeaux Sciences Agro, INRA, Université de Bordeaux, 210 Chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France (P.G.)
| | - Xian Zhang
- Research Centre for Plant RNA Signaling, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China (C.Q., B.L., Y.F., X.Z., Z.Y., E.R., M.Z., H.W., N.S., P.C., Y.H.)
- Warwick-Hangzhou RNA Signalling Joint Laboratory, School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom (E.R., S.J., Y.H.)
- Institute of Science and the Environment, University of Worcester, Worcester WR2 6AJ, United Kingdom (M.T.)
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China (Q.C.)
- MOE Key Laboratory of Bioinformatics, Centre for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China (Y.L.); and
- UMR EGFV, Bordeaux Sciences Agro, INRA, Université de Bordeaux, 210 Chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France (P.G.)
| | - Zhiming Yu
- Research Centre for Plant RNA Signaling, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China (C.Q., B.L., Y.F., X.Z., Z.Y., E.R., M.Z., H.W., N.S., P.C., Y.H.)
- Warwick-Hangzhou RNA Signalling Joint Laboratory, School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom (E.R., S.J., Y.H.)
- Institute of Science and the Environment, University of Worcester, Worcester WR2 6AJ, United Kingdom (M.T.)
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China (Q.C.)
- MOE Key Laboratory of Bioinformatics, Centre for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China (Y.L.); and
- UMR EGFV, Bordeaux Sciences Agro, INRA, Université de Bordeaux, 210 Chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France (P.G.)
| | - Eugene Ryabov
- Research Centre for Plant RNA Signaling, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China (C.Q., B.L., Y.F., X.Z., Z.Y., E.R., M.Z., H.W., N.S., P.C., Y.H.)
- Warwick-Hangzhou RNA Signalling Joint Laboratory, School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom (E.R., S.J., Y.H.)
- Institute of Science and the Environment, University of Worcester, Worcester WR2 6AJ, United Kingdom (M.T.)
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China (Q.C.)
- MOE Key Laboratory of Bioinformatics, Centre for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China (Y.L.); and
- UMR EGFV, Bordeaux Sciences Agro, INRA, Université de Bordeaux, 210 Chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France (P.G.)
| | - Mei Zhao
- Research Centre for Plant RNA Signaling, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China (C.Q., B.L., Y.F., X.Z., Z.Y., E.R., M.Z., H.W., N.S., P.C., Y.H.)
- Warwick-Hangzhou RNA Signalling Joint Laboratory, School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom (E.R., S.J., Y.H.)
- Institute of Science and the Environment, University of Worcester, Worcester WR2 6AJ, United Kingdom (M.T.)
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China (Q.C.)
- MOE Key Laboratory of Bioinformatics, Centre for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China (Y.L.); and
- UMR EGFV, Bordeaux Sciences Agro, INRA, Université de Bordeaux, 210 Chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France (P.G.)
| | - Hui Wang
- Research Centre for Plant RNA Signaling, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China (C.Q., B.L., Y.F., X.Z., Z.Y., E.R., M.Z., H.W., N.S., P.C., Y.H.)
- Warwick-Hangzhou RNA Signalling Joint Laboratory, School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom (E.R., S.J., Y.H.)
- Institute of Science and the Environment, University of Worcester, Worcester WR2 6AJ, United Kingdom (M.T.)
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China (Q.C.)
- MOE Key Laboratory of Bioinformatics, Centre for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China (Y.L.); and
- UMR EGFV, Bordeaux Sciences Agro, INRA, Université de Bordeaux, 210 Chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France (P.G.)
| | - Nongnong Shi
- Research Centre for Plant RNA Signaling, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China (C.Q., B.L., Y.F., X.Z., Z.Y., E.R., M.Z., H.W., N.S., P.C., Y.H.)
- Warwick-Hangzhou RNA Signalling Joint Laboratory, School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom (E.R., S.J., Y.H.)
- Institute of Science and the Environment, University of Worcester, Worcester WR2 6AJ, United Kingdom (M.T.)
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China (Q.C.)
- MOE Key Laboratory of Bioinformatics, Centre for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China (Y.L.); and
- UMR EGFV, Bordeaux Sciences Agro, INRA, Université de Bordeaux, 210 Chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France (P.G.)
| | - Pengcheng Zhang
- Research Centre for Plant RNA Signaling, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China (C.Q., B.L., Y.F., X.Z., Z.Y., E.R., M.Z., H.W., N.S., P.C., Y.H.)
- Warwick-Hangzhou RNA Signalling Joint Laboratory, School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom (E.R., S.J., Y.H.)
- Institute of Science and the Environment, University of Worcester, Worcester WR2 6AJ, United Kingdom (M.T.)
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China (Q.C.)
- MOE Key Laboratory of Bioinformatics, Centre for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China (Y.L.); and
- UMR EGFV, Bordeaux Sciences Agro, INRA, Université de Bordeaux, 210 Chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France (P.G.)
| | - Stephen Jackson
- Research Centre for Plant RNA Signaling, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China (C.Q., B.L., Y.F., X.Z., Z.Y., E.R., M.Z., H.W., N.S., P.C., Y.H.)
- Warwick-Hangzhou RNA Signalling Joint Laboratory, School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom (E.R., S.J., Y.H.)
- Institute of Science and the Environment, University of Worcester, Worcester WR2 6AJ, United Kingdom (M.T.)
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China (Q.C.)
- MOE Key Laboratory of Bioinformatics, Centre for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China (Y.L.); and
- UMR EGFV, Bordeaux Sciences Agro, INRA, Université de Bordeaux, 210 Chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France (P.G.)
| | - Mahmut Tör
- Research Centre for Plant RNA Signaling, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China (C.Q., B.L., Y.F., X.Z., Z.Y., E.R., M.Z., H.W., N.S., P.C., Y.H.)
- Warwick-Hangzhou RNA Signalling Joint Laboratory, School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom (E.R., S.J., Y.H.)
- Institute of Science and the Environment, University of Worcester, Worcester WR2 6AJ, United Kingdom (M.T.)
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China (Q.C.)
- MOE Key Laboratory of Bioinformatics, Centre for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China (Y.L.); and
- UMR EGFV, Bordeaux Sciences Agro, INRA, Université de Bordeaux, 210 Chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France (P.G.)
| | - Qi Cheng
- Research Centre for Plant RNA Signaling, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China (C.Q., B.L., Y.F., X.Z., Z.Y., E.R., M.Z., H.W., N.S., P.C., Y.H.)
- Warwick-Hangzhou RNA Signalling Joint Laboratory, School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom (E.R., S.J., Y.H.)
- Institute of Science and the Environment, University of Worcester, Worcester WR2 6AJ, United Kingdom (M.T.)
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China (Q.C.)
- MOE Key Laboratory of Bioinformatics, Centre for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China (Y.L.); and
- UMR EGFV, Bordeaux Sciences Agro, INRA, Université de Bordeaux, 210 Chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France (P.G.)
| | - Yule Liu
- Research Centre for Plant RNA Signaling, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China (C.Q., B.L., Y.F., X.Z., Z.Y., E.R., M.Z., H.W., N.S., P.C., Y.H.)
- Warwick-Hangzhou RNA Signalling Joint Laboratory, School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom (E.R., S.J., Y.H.)
- Institute of Science and the Environment, University of Worcester, Worcester WR2 6AJ, United Kingdom (M.T.)
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China (Q.C.)
- MOE Key Laboratory of Bioinformatics, Centre for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China (Y.L.); and
- UMR EGFV, Bordeaux Sciences Agro, INRA, Université de Bordeaux, 210 Chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France (P.G.)
| | - Philippe Gallusci
- Research Centre for Plant RNA Signaling, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China (C.Q., B.L., Y.F., X.Z., Z.Y., E.R., M.Z., H.W., N.S., P.C., Y.H.)
- Warwick-Hangzhou RNA Signalling Joint Laboratory, School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom (E.R., S.J., Y.H.)
- Institute of Science and the Environment, University of Worcester, Worcester WR2 6AJ, United Kingdom (M.T.)
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China (Q.C.)
- MOE Key Laboratory of Bioinformatics, Centre for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China (Y.L.); and
- UMR EGFV, Bordeaux Sciences Agro, INRA, Université de Bordeaux, 210 Chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France (P.G.)
| | - Yiguo Hong
- Research Centre for Plant RNA Signaling, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China (C.Q., B.L., Y.F., X.Z., Z.Y., E.R., M.Z., H.W., N.S., P.C., Y.H.);
- Warwick-Hangzhou RNA Signalling Joint Laboratory, School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom (E.R., S.J., Y.H.);
- Institute of Science and the Environment, University of Worcester, Worcester WR2 6AJ, United Kingdom (M.T.);
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China (Q.C.);
- MOE Key Laboratory of Bioinformatics, Centre for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China (Y.L.); and
- UMR EGFV, Bordeaux Sciences Agro, INRA, Université de Bordeaux, 210 Chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France (P.G.)
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