Human activity is causing new encounters between viruses and plants. Anthropogenic interventions include changing land use, decreasing biodiversity, trade, the introduction of new plant and vector species to native landscapes, and changing atmospheric and climatic conditions. The discovery of thousands of new viruses, especially those associated with healthy-appearing native plants, is shifting the paradigm for their role within the ecosystem from foe to friend. The cost of new plant virus incursions can be high and result in the loss of trade and/or production for short or extended periods. We present and justify three recommendations for plant biosecurity to improve communication about plant viruses, assist with the identification of viruses and their impacts, and protect the high economic, social, environmental, and cultural value of our respective nations' unique flora: 1) As part of the burden of proof, countries and jurisdictions should identify what pests already exist in, and which pests pose a risk to, their native flora; 2) Plant virus sequences not associated with a recognized virus infection are designated as “uncultured virus” and tentatively named using the host plant species of greatest known prevalence, the word “virus,” a general location identifier, and a serial number; and 3) Invest in basic research to determine the ecology of known and new viruses with existing and potential new plant hosts and vectors and develop host-virus pathogenicity prediction tools. These recommendations have implications for researchers, risk analysts, biosecurity authorities, and policy makers at both a national and an international level.
References
[1]
World Trade Organization (1995) Agreement on the Application of Sanitary and Phytosanitary Measures. In: Results of the Uruguay Round of Multilateral Trade Negotiations: The Legal Texts. Geneva, Switzerland: World Trade Organization. pp. 69–83.
[2]
Stack JP (2006) Challenges to crop biosecurity. In: Guillino ML, Fletcher J, Gamliel A, Stack JP, editors. Crop biosecurity: assuring our global food supply (NATO Science for peace and security series-C: environmental security). Dordrecht: Springer. pp. 15–23.
[3]
Fletcher J, Stack J (2007) Agricultural biosecurity: threats and impacts for plant pathogens. In: Forum on Microbial Threats, National Academy of Sciences, Institute of Medicine, editor. Global infectious disease surveillance and detection: assessing the challenges—finding solutions. Washington, D.C.: National Academies Press. pp. 86–94.
[4]
Ochoa-Corona FM (2011) Biosecurity, microbial forensics and plant pathology: education challenges, overlapping disciplines and research needs. Australasian Plant Pathology 40: 335–338. doi: 10.1007/s13313-011-0052-z
[5]
Pearson MN, Clover GRG, Guy PL, Fletcher JD, Beever REB (2006) A review of the plant virus, viroid and mollicute records for New Zealand. Australasian Plant Pathology 35: 217–252. doi: 10.1071/ap06016
[6]
Lebas BSM, Ochoa-Corona FM, Elliott DR, Double B, Smales T, et al. (2006) Control and monitoring: quarantine situation of Plum pox virus in New Zealand. Bulletin OEPP/EPPO Bulletin 36: 296–301. doi: 10.1111/j.1365-2338.2006.00999.x
[7]
Lebas BSM, Ochoa-Corona FM, Tang ZJ, Thangavel R, Elliott DR, et al. (2007) First report of Spinach latent virus in tomato in New Zealand. Plant Disease 91: 228. doi: 10.1094/pdis-91-2-0228a
[8]
Lebas BSM, Ochoa-Corona FM, Elliott DR, Tang J, Blouin AG, et al. (2009) Investigation of an outbreak of soil-borne wheat mosaic virus in New Zealand. Australasian Plant Pathology 38: 85–89. doi: 10.1071/ap08082
[9]
Ochoa Corona FM, Lebas BSM, Elliott DR, Tang JZ, Alexander BJR (2007) New host records and new host family range for Turnip mosaic virus in New Zealand. Australasian Plant Disease Notes 2: 127–130. doi: 10.1071/dn07051
[10]
International Plant Protection Convention (2010) International Standards for Phytosanitary Measures (ISPM). Available: www.ippc.int/index.php?id=13399. Accessed 23 March 2013.
[11]
Rodoni B (2009) The role of plant biosecurity in preventing and controlling emerging plant virus disease epidemics. Virus Res 141: 150–157. doi: 10.1016/j.virusres.2008.11.019
[12]
McKirdy S, Rodoni B, Moran J, Sharma S (2012) Microbial threat – a growing concern for plant biosecurity. Microbiology Australia 33: 11–13.
[13]
Beale R, Fairbrother J, Inglis A, Trebeck D (2008) One biosecurity: a working partnership. The independent review of Australia's quarantine and biosecurity arrangements report to the Australian Government. Canberra: Commonwealth of Australia. 244 p.
[14]
Nairn ME, Allen PG, Inglis A, Tanner C (1996) Australian quarantine: a shared responsibility. Canberra: Department of Primary Industries and Energy.
[15]
Handelsman J (2004) Metagenomics: application of genomics to uncultured microorganisms. Microbiol Mol Biol Rev 68: 669–685. doi: 10.1128/mmbr.68.4.669-685.2004
Adams IP, Glover RH, Monger WA, Mumford R, Jackeviciene E, et al. (2009) Next-generation sequencing and metagenomic analysis: a universal diagnostic tool in plant virology. Mol Plant Pathol 10: 537–45. doi: 10.1111/j.1364-3703.2009.00545.x
[19]
Kristensen DM, Mushegian AR, Dolja VV, Koonin EV (2009) New dimensions of the virus world discovered through metagenomics. Trends Microbiol 18: 11–19. doi: 10.1016/j.tim.2009.11.003
[20]
Kreuze JF, Perez A, Untiveros M, Quispe D, Fuentes S, et al. (2009) Complete viral genome sequence and discovery of novel viruses by deep sequencing of small RNAs: a generic method for diagnosis, discovery and sequencing of viruses. Virology 388: 1–7. doi: 10.1016/j.virol.2009.03.024
[21]
Wu Q, Luo Y, Lu R, Lau N, Lai EC, et al. (2010) Virus discovery by deep sequencing and assembly of virus-derived small silencing RNAs. Proc Natl Acad Sci U S A 107: 1606–11. doi: 10.1073/pnas.0911353107
[22]
Roossinck MJ, Saha P, Wiley GB, Quan J, White JD, et al. (2010) Ecogenomics: using massively parallel pyrosequencing to understand virus ecology. Mol Ecol 19: 81–88. doi: 10.1111/j.1365-294x.2009.04470.x
[23]
Wren JD, Roossinck MJ, Nelson RS, Scheets K, Palmer MW, et al. (2006) Plant virus biodiversity and ecology. PLoS Biol 4: e80 doi:10.1371/journal.pbio.0040080.
[24]
Sabanadzovic S, Abou Ghanem-Sabanadzovic N, Valverde RA (2010) A novel monopartite dsRNA virus from rhododendron. Arch Virol 155: 1859–1863. doi: 10.1007/s00705-010-0770-5
[25]
Roossinck MJ (2012) Plant virus metagenomics: biodiversity and ecology. Annu Rev Genet 46: 357–67. doi: 10.1146/annurev-genet-110711-155600
[26]
Roossinck MJ (2011) The good viruses: viral mutualistic symbioses. Nat Rev Microbiol 9: 99–108. doi: 10.1038/nrmicro2491
[27]
Xu P, Chen F, Mannas JP, Feldman T, Sumner LW, et al. (2008) Virus infection improves drought tolerance. New Phytol 180: 911–21. Erratum in: New Phytol 184: 275. doi: 10.1111/j.1469-8137.2008.02627.x
[28]
Malmstrom CM, Melcher U, Bosque-Pérez NA (2011) The expanding field of plant virus ecology: historical foundations, knowledge gaps, and research directions. Virus Res 9: 84–94. doi: 10.1016/j.virusres.2011.05.010
[29]
Djikeng A, Kuzmickas R, Anderson NG, Spiro DJ (2009) Metagenomic analysis of RNA viruses in a fresh water lake. PLoS ONE 4: e7264 doi:10.1371/journal.pone.0007264.
[30]
Scheets K, Blinkova O, Melcher U, Palmer MW, Wiley GB, et al. (2011) Detection of members of the Tombusviridae in the Tallgrass Prairie Preserve, Osage County, Oklahoma USA. Virus Res 160: 256–263. doi: 10.1016/j.virusres.2011.06.023
[31]
New Zealand. Parliament. (1993) Biosecurity Act 1993. Public Act 1993 No. 95. 119 p.
[32]
Young N (2003) Tiakina Aotearoa protect New Zealand: the biosecurity strategy for New Zealand. Wellington: Biosecurity Council. 63 p. Available: www.biosecurity.govt.nz/biosec/sys/strat？egy/biostrategy/biostrategynz. Accessed 5 April 2013.
[33]
Kuhn JH, Jahrling PB (2010) Clarification and guidance on the proper usage of virus and virus species names. Arch Virol 155: 445–453. doi: 10.1007/s00705-010-0600-9
[34]
van Regenmortel MHV, Mahy BWJ (2004) Emerging issues in virus taxonomy. Emerg Infect Dis 10: 8–13. doi: 10.3201/eid1001.030279
[35]
King AMQ, Adams MJ, Carstens EB, Lefkowitz EJ, editors (2012) Virus taxonomy: ninth report of the International Committee on Taxonomy of Viruses. San Diego: Elsevier Academic Press. 1327 p.
[36]
Dijkstra J, Kahn JA (2002) The current naming of plant viruses: a critical appraisal. Arch Virol 147: 2251–2253. doi: 10.1007/s007050200051
[37]
Angly FE, Felts B, Breitbart M, Salamon P, Edwards RA, et al. (2006) The marine viromes of four oceanic regions. PLoS Biol 4: e368 doi:10.1371/journal.pbio.0040368.
[38]
Van Regenmortel MH, Burke DS, Calisher CH, Dietzgen RG, Fauquet CM, et al. (2010) A proposal to change existing virus species names to non-Latinized binomials. Arch Virol 155: 1909–1919. doi: 10.1007/s00705-010-0831-9
[39]
Bos L (2002) International naming of viruses - a digest of recent developments. Arch Virol 147: 1471–1477. doi: 10.1007/s007050200044
[40]
Gibbs AJ (2000) Virus nomenclature descending into chaos. Arch Virol 145: 1505–1507. doi: 10.1007/s007050070108
[41]
Legg JP, Fauquet CM (2004) Cassava mosaic geminiviruses in Africa. Plant Mol Biol 56: 585–599. doi: 10.1007/s11103-004-1651-7
[42]
Rojas MR, Hagen C, Lucas WJ, Gilbertson RL (2005) Exploiting chinks in the plant's armour: evolution and emergence of geminiviruses. Annu Rev Phytopathol 4: 361–394. doi: 10.1146/annurev.phyto.43.040204.135939
[43]
Li F, Ding SW (2006) Virus counterdefense: diverse strategies for evading the RNA silencing immunity. Annu Rev Microbiol 60: 503–531. doi: 10.1146/annurev.micro.60.080805.142205
[44]
Lucas WJ (2006) Plant viral movement proteins: agents for cell-to-cell trafficking of viral genomes. Virology 344: 169–184. doi: 10.1016/j.virol.2005.09.026
[45]
Pallas V, García JA (2011) How do plant viruses induce disease? Interactions and interference with host components. J Gen Virol 92: 2691–2705. doi: 10.1099/vir.0.034603-0
[46]
Committee on Scientific Milestones for the Development of a Gene-Sequence-Based Classification System for the Oversight of Select Agents (2010) Sequence-based classification of select agents: a brighter line. Washington, D.C.: National Academies Press. 234 p.
Rúa MA, Pollina EC, Power AG, Mitchell CE (2011) The role of viruses in biological invasions: friend or foe. Curr Opin Virol 1: 68–72. doi: 10.1016/j.coviro.2011.05.018
[49]
Roossinck MJ (2011) The big unknown: plant virus biodiversity. Curr Opin Virol 1: 63–67. doi: 10.1016/j.coviro.2011.05.022
