!!John Allan Downie - Selected Publications
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The following publications (from 2000) are selected from 253 publications that have over 15,000 citations (based on Google Scholar). h-index  Google Scholar:   67  (h-index Web of Science = 62)  i10 Google Scholar:    180\\
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Zorreguieta A., Finnie C, Downie JA. (2000) Extracellular glycanases of Rhizobium leguminosarum are actived on the cell surface by an exopolysaccharide-related component.  J. Bacteriol. 182, 1304-1312.\\
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Yeoman KH, Wisniewski-Dye F, Timony C, Stevens JB, Deluca NG, Downie JA, Johnston AWB. (2000) Analysis of the Rhizobium leguminosarum siderophore-uptake gene fhuA: differential expression in free-living bacteria nitrogen-fixing bacteroids and distribution of an fhuA pseudogene in different strains.  Microbiol. 146, 829-837.\\
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Walker SA, Downie JA (2000) Entry of Rhizobium leguminosarum bv. viciae into root hairs requires minimal Nod factor specificity, but subsequent infection thread growth requires nodO or nodE.  Molec. Plant-Microbe Interact., 13, 754-762.\\
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Lithgow JK, Wilkinson A, Hardman A, Rodelas B, Wisniewski-Dye F., Williams P, Downie JA (2000) The regulatory locus cinRI in Rhizobium leguminosarum controls a network of quorum-sensing loci.  Molec. Microbiol. 37, 81-97.\\
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Laue B.E, Jiang Y, Ram Chhabra S, Jacobs S, Stewart, GSAB, Hardman A, Downie JA, O’Gara F, Williams P. (2000) The biocontrol strain Pseudomonas fluorescens F113 produces the Rhizobium small bacteriocin, N-(3-hydroxy-7-cis-tetradecenoyl) homoserine lactone, via HdtS, a putative novel N-acylhomoserine lactone synthase.  Microbiol. 146, 2469-2480.\\
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Downie J.A, Bonfante P. (2000) Development and good breeding in legume models: poise and peas?  New Phytol. 148, 7-9.\\
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Walker SA, Viprey V, Downie JA (2000) Dissection of nodulation signaling using pea mutants defective for calcium spiking induced by Nod factors and chitin oligomers.  Proc. Natl. Acad. Sci. USA 97, 13412-13418.\\
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Lithgow JK, Danino, VE, Jones J, Downie, JA (2001) Analysis of N-acyl homoserine quorum-sensing molecules made by different strains and biovars of Rhizobium leguminosarum containing different symbiotic plasmids.  Plant & Soil, 232, 3-12.\\
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Marroqui S, Zorreguieta A, Santamaria C, Temprano F, Soberon M, Megias M, Downie JA  (2001)  Enhanced symbiotic performance by Rhizobium tropici glycogen synthase mutants. J. Bacteriol 183, 854-864.\\
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Swift S, Downie JA, Whitehead N A, Barnard AML, Salsmond GPC, Williams PA (2001). Quorum sensing as a population-density-dependent determinant of bacterial physiology. Adv. Microbial Physiol. 45, 199-270\\
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Downie JA, Young JPW (2001) Genome sequencing; the ABC of symbiosis.  Nature, 412, 597-598\\
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Hirsch AM, Lum, MR, Downie, JA (2001) What makes the rhizobia-legume symbiosis so special? Plant Physiol. 127, 1484-1492\\
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Hogg B, Davies AE, Wilson KE, Bisseling T, Downie JA (2002) Competitive nodulation blocking of cv. Afghanistan pea is related to high levels of nodulation factors made by some strains of Rhizobium leguminosarum bv. viciae. Molec. Plant-Microbe Interact 15, 60-66\\
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Wisniewski-Dye F, Jones J, Chhabra SR, Downie JA (2002) The raiIR genes are part of a quorum-sensing network controlled by cinI and cinR in Rhizobium leguminosarum.  J. Bacteriol. 184, 1597-606.\\
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Wilkinson A, Danino VE, Wisniewski-Dye F, Lithgow JK  Downie JA (2002) N-acyl-homoserine lactone inhibition of rhizobial growth is mediated by two quorum-sensing genes that regulate plasmid transfer. J. Bacteriol. 184: 1597-1606\\
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Wisniewski-Dye F,  Downie JA (2002). Quorum sensing in Rhizobium. Antonie van Leuwenhoek 81: 397-407\\
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Schneider A, Walker SA., Sagan M, Duc G, Ellis THN, Downie JA (2002) Mapping of the nodulation loci sym9 and sym10 pf pea (Pisum sativum L.). Theor. Appl. Genet. 104, 1312-1316\\
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Downie, JA, Parniske M (2002) Fixation with regulation. Nature 420: 369-370\\
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Lodwig EM, Hosie AHF, Bourdes A, Findlay K, Allaway D, Karunakaran R, Downie JA, Poole PS (2003) Amino-acid cycling drives nitrogen fixation in the Rhizobium legume symbiosis. Nature 422: 722-726\\
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Danino VE, Wilkinson A, Edwards A, Downie JA (2003) Recipient-induced transfer of the symbiotic plasmid pRL1JI in Rhizobium leguminosarum bv. viciae is regulated by a quorum-sensing relay. Molec. Microbiol. 50: 511-525\\
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Parniske M, Downie JA. (2003) Locks, keys and symbioses. Nature 425:569-70.\\
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Mitra RM, Gleason CA, Edwards A, Hadfield J, Downie JA, Oldroyd GED, Long SR (2004) A Ca2+/calmodulin-dependent protein kinase required for symbiotic nodule development: Gene identification by transcript-based cloning. Proc. Natl. Acad. Sci.U S A. 101, 4701-4705\\
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Oldroyd GED, Downie JA (2004) Calcium, kinases and nodulation signalling in legumes. Nature Molec. Cell Biol. Rev. 5, 566-576\\
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Lodwig, EM, Leonard M, Marroqui, S, Wheeler, TR, Findlay K, Downie JA, Poole PS (2005) Role of polyhydroxybutyrate and glycogen as carbon storage compounds in pea and bean bacteroids. Mol. Plant. Microbe Interact 18 67-74\\
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Imaizumi-Anraku H, Takeda  N, Charpentier M, Perry J,  Miwa H, Umehara Y, Kouchi H, Murakami Y, Mulder L, Vickers K, Pike J,  Downie JA, Wang T, Sato S, Asamizu E, Tabata S, Yoshikawa M, Murooka Y, Wu  J-G, Kawaguchi  M, Kawasaki S, Parniske M,Hayashi M (2005) The plastid as a checkpoint for symbiotic fungal and bacterial entry into plant roots  Nature 433, 527-531\\
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Downie JA (2005) Legume haemoglobins: symbiotic nitrogen fixation needs bloody nodules. Current Biology 15, R196-R198\\
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Rodriguez-Quinones F, Maguire M, Wallington EJ, Gould PS, Yerko V, Downie JA, Lund PA (2005) Two of the three groEL homologues in Rhizobium leguminosarum are dispensable for normal growth Arch.  Microbiol. 183, 253 – 265\\
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Studholme DJ, Downie JA, Preston GM (2005) Protein domains and architectural innovation in plant-associated Proteobacteria BMC Genomics 6, 17.\\
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Kaló P,  Gleason C, Edwards A,  Marsh J, Mitra RK, Hirsch S, Jakab J, Sims S, Long S R, Rogers J, Kiss G B, Downie J A, Oldroyd G E D (2005) Nodulation signalling in legumes requires NSP2, a member of the GRAS family of transcriptional regulators. Science 308, 1786-1789\\
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Downie JA (2005) Quorum-sensing regulation in Rhizobium leguminosarum biovar viciae. In Roots and Soil Management: Interactions Between Roots and the Soil pp223-232. Eds R.W. Zobel and S.F. Wright; American Society for Agronomy, Crop Science Society of America, Soil Science Society of America, Madison Wisconsin.\\
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Kanamori N, Madsen LH, Radutoiu S, Frantescu M, Quistgaard EM, Miwa H, Downie JA, James EK, Felle HH, Haaning LL, Jensen TH, Sato S, Nakamura Y, Tabata S, Sandal N, Stougaard J (2006) A nucleoporin is required for induction of Ca2+ spiking in legume nodule development and essential for rhizobial and fungal symbiosis. Proc. Natl. Acad. Sci. U S A. 103, 359-64.\\
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Russo DM, Williams A, Edwards A, Posadas AM, Finnie C, Dankert M, Downie JA, Zorreguieta A (2006) Proteins exported via the PrsD-PrsE Type I secretion system and the acidic exopolysaccharide are involved in biofilm formation by Rhizobium leguminosarum J. Bacteriol. 188, 4474-4486\\
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Tirichine L, Imaizumi-Anraku H, Yoshida S, Murakami Y, Madsen LH, Miwa H, Nakagawa T, Sandal N, Albrektsen AS, Kawaguchi M, Downie A, Sato S, Tabata S, Kouchi H, Parniske M, Kawasaki S, Stougaard J (2006) Deregulation of a Ca2+/calmodulin kinase leads to spontaneous nodule development. Nature, 441, 1153-1156.\\
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Oldroyd GED, Downie JA (2006) Nuclear calcium changes at the core of symbiosis signalling. Current Opinion in Plant Biol. 9, 351-357\\
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Miwa H, Sun J, Oldroyd GED, Downie JA (2006) Analysis of Nod-factor-induced calcium signalling in root hairs of symbiotically defective mutants of Lotus japonicus. Mol. Plant. Microbe Interact. 19, 914-923\\
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Miwa H, Sun J, Gleason C, Heckmann A, Lombardo F, Edwards A, Oldroyd GED Downie JA (2006) New insights into Nod-factor-induced Ca2+ signaling determined using Lotus japonicus mutants and transgenic Medicago truncatula expressing a Ca2+-sensing protein. In: Biology of Plant-Microbe Interactions Vol 5, pp 54-59 Eds Sanchez, F., Quinto C., Lopez-Lara, I.M., Geiger, O. \\
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Heckmann AB, Lombardo F, Miwa H, Perry JA, Bunnewell S, Parniske M, Wang TL, Downie JA (2006). Lotus japonicus nodulation requires two GRAS domain regulators, one of which is functionally conserved in a non-legume. Plant Physiol. 142, 1739-1750.\\
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Lombardo F, Heckmann AB, Miwa H, Perry JA, Yano K, Hayashi M, Parniske M, Wang TL, Downie JA (2006). Identification of symbiotically defective mutants of Lotus japonicus affected in infection thread growth. Molec. Plant Microbe Interact. 19, 1444-1450.\\
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Miwa, H, Sun J, Oldroyd, GED, Downie, JA (2006). Analysis of calcium spiking using a cameleon calcium sensor reveals that nodulation gene expression is regulated by calcium spike number and the developmental status of the cell. Plant J. 48, 883-894.\\
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Murakami Y, Miwa H, Imaizumi-Anraku H, Kouchi H, Downie JA, Kawaguchi M, Kawasaki S (2006). Positional cloning identifies Lotus japonicus NSP2, a putative transcription factor of the GRAS family, required for NIN and ENOD40 gene expression in nodule initiation. DNA Res. 13, 255-265.\\
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Saito K, Yoshikawa M, Yano K, Miwa H, Uchida H, Asamizu E, Sato S, Tabata S, Imaizumi-Anraku H, Umehara Y, Kouchi H, Murooka Y, Szczyglowski K, Downie JA, Parniske M, Hayashi M, Kawaguchi M (2007). NUCLEOPORIN85 is required for calcium spiking, fungal and bacterial symbioses, and seed production in Lotus japonicus. Plant Cell 19, 610-624.\\
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Sun J, Miwa H, Downie JA, Oldroyd GED (2007) Mastoparan activates calcium  spiking analogous to Nod Factor-induced responses in Medicago truncatula root hair cells. Plant Physiol. 144, 1-8\\
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Downie, JA (2007). Infectious Heresy. Science 316, 1296-1297\\
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McAnulla C, Edwards A, Sanchez-Contreras M, Sawers RG, Downie JA  (2007) Quorum-sensing-regulated transcriptional initiation of plasmid transfer and replication genes in Rhizobium leguminosarum biovar viciae. Microbiol. 153, 2074-2082\\
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Downie JA (2007) Rhizobia. In: Encyclopedia of Life Sciences. John Wiley & Sons, Ltd: Chichester http://www.els.net/ [[DOI: 10.1002/9780470015902.a0020120]]\\
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Sanchez-Contreras M,  Bauer WD,  Gao M,  Robinson JB, Downie JA (2007) Quorum-sensing regulation in rhizobia and its role in symbiotic interactions with legumes. Philos. Trans. R. Soc. Lond. B Biol. Sci. 362:1149-63\\
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Joint I, Downie JA, Williams P (2007) Bacterial conversations: talking, listening,and eavesdropping. An introduction. Philos. Trans. R. Soc. London B 362: 1115-1117\\
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Peiter E, Sun J, Heckmann AB, Venkateshwaran M, Riely BK, Otegui MS, Edwards A, Freshour G, Hahn MG, Cook DR, Sanders D, Oldroyd GED, Downie JA, Ane JM (2007) The Medicago truncatula DMI1 protein modulates cytosolic calcium signaling. Plant Physiol. 145: 192-203\\
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Edwards A, Heckmann AB, Yousafzai, F, Duc G, Downie JA (2007) Structural implications of mutations in the pea SYM8 symbiosis gene, the DMI1 ortholog, encoding a predicted ion channel. Molec. Plant-Microbe Interact. 20: 1183-1191\\
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Krehenbrink M, Downie JA (2008) Identification of protein secretion systems and novel secreted proteins in Rhizobium leguminosarum bv. viciae BMC Genomics 9:55\\
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Williams A, Wilkinson A, Krehenbrink M, Russo DM, Zorreguieta A, Downie JA (2008) Glucomannan-mediated attachment of Rhizobium leguminosarum to pea root hairs is required for competitive nodule infection. J Bacteriol. 190:4706-4715\\
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Oldroyd GED, Downie JA (2008) Coordinating nodule morphogenesis with rhizobial infection in legumes. Annu. Rev. Plant Biol. 59:519-46\\
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Crossman LC, Castillo-Ramírez S, McAnnula C, Lozano L, Vernikos GS, Acosta JL, Ghazoui ZF, Hernández-González I, Meakin G, Walker AW, Hynes MF, Young JPW, Downie JA, Romero D, Johnston AWB, Dávila G, Parkhill J, González V (2008) A common genomic framework for a diverse assembly of plasmids in the symbiotic nitrogen fixing bacteria. PLoS ONE.2;3:e2567\\
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Kosuta S, Hazledine S, Sun J, Miwa H, Morris RJ, Downie JA, Oldroyd GED (2008) Differential and chaotic calcium signatures in the symbiosis signaling pathway of legumes. Proc. Natl. Acad. Sci. USA 105; 9823-9828\\
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Downie JA, González JE (2008) Cell-to-cell communication in rhizobia: quorum sensing and plant signalling. In Chemical Communication among Bacteria (Ed Winans S.C. and Bassler B.L.) pp 213-232. ASM press Washington DC.\\
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Poole PS, Hynes MF, Johnston AWB., Tiwari RP, Reeve WG, Downie JA (2008) Physiology of root-nodule bacteria. In Nitrogen-fixing Leguminous Symbioses (Ed Dilworth, M.J., James, E.K., Sprent, J.I. and Newton, W.E) pp 241-292. Springer  \\
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Fox MA, Karunakaran R, Leonard ME, Mouhsine B, Williams A, East AK, Downie JA, Poole PS (2008) Characterization of the quaternary amine transporters of Rhizobium leguminosarum bv. viciae 3841. FEMS Microbiol. Lett. 287;212-220\\
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Hirsch S, Kim J, Munoz A, Heckmann AB, Downie JA, Oldroyd, GED. (2009) GRAS proteins form a DNA binding complex to induce gene expression during nodulation signaling in Medicago truncatula. Plant Cell 21: 545-557\\
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Yokota K, Fukai E, Madsen LH, Jurkiewicz A, Rueda P, Radutoiu, S, Held M, Hossain MS, Szczyglowski K, Morieri G, Oldroyd GED, Downie JA., Nielsen M.W, Rusek AM, Sato S, Tabata S, James EK, Oyaizu H, Sandal N, Stougaard J (2009) Rearrangement of actin cytoskeleton mediates invasion of Lotus japonicus roots by Mesorhizobium loti. Plant Cell 21: 267-284\\
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Edwards A, Frederix M, Wisniewski-Dye F, Jones J, Zorreguieta A, Downie JA (2009) The cin and rai quorum-sensing regulatory systems in Rhizobium leguminosarum are coordinated by ExpR and CinS, a small regulatory protein co-expressed with CinI. J. Bacteriol. 191: 3059-3067\\
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Talukdar T, Goreka KM, Carvalho-Niebel F, Downie JA, Cullimore J, Pikula S (2009) Annexins-calcium- and membrane-binding proteins in the plant kingdom. Acta Biochimica Polonika 56, 199-210\\
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Hazeldean S, Sun J, Downie JA, Oldroyd GED, Morris R (2009) Nonlinear time series analysis of nodulation factor  induced calcium oscillations: evidence for deterministic chaos? PLOS One 4 (8) e6637 \\
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Kiss E, Oláh B, Kaló P, Morales M, Heckmann AB, Borbola A, Lózsa A, Kontár K, Middleton P, Downie JA, Oldroyd GED, Endre G (2009) LIN, a novel type of U-box/WD40 protein, controls early infection by rhizobia in legumes. Plant Physiol. 151, 1239-1249\\
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Downie JA (2010) The roles of extracellular proteins polysaccharides and signals in the interactions of rhizobia with legume roots. FEMS Microbiol. Rev. 34, 150-170\\
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Miyahara A, Richens J,  Starker C, Morieri G, Smith, L, Long, SR, Downie, JA, Oldroyd, GED (2010) Conservation in function of a SCAR/WAVE component during infection thread and root hair growth in Medicago truncatula. Mol. Plant-Microbe Interact. 23: 1553-1562 \\
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Frederix, M, Edwards A, McAnulla C, Downie J. A. (2011) Co-ordination of quorum-sensing regulation in Rhizobium leguminosarum by induction of an anti-repressor. Molec. Microbiol. 81: 994-1007.\\
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Frederix M, Downie JA (2011) Quorum Sensing: regulating the regulators. Adv. Microbial Physiol. 58: 23-80\\
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Oldroyd GED, Murray JD, Poole PS, Downie, JA (2011) The rules of engagement in the legume-rhizobial symbiosis. Annu. Rev. Genet. 45:119-144\\
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Kosuta, S, Held M, Hossain MS, Morieri G MacGillivary A, Johansen C, Antolin-Llovera M, Parniske M, Oldroyd GED, Downie JA, Karas B Szczyglowski, K (2011) Lotus japonicus symRK-14 uncouples the cortical and epidermal symbiotic program. Plant J. 67: 929-940\\
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Li R, Knox MR, Edwards A, Hogg B, Ellis THN, Wei G,  Downie JA (2011) Natural variation in host-specific nodulation of pea is associated with a haplotype of the SYM37 LysM-type receptor-like kinase. Molec. Plant-Microbe Interact. 24: 1396-1403\\
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Downie JA (2011) A Eulogy to Adam Kondorosi Molec. Plant-Microbe Interact. 24: 1272-1275\\
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Krehenbrink M, Edwards A, Downie JA (2011) The superoxide dismutase SodA is targeted to the periplasm in a SecA-dependent manner by a novel mechanism. Molec. Microbiol. 82: 164-179\\
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Capoen W, Sun J, Wysham D, Otegui MS, Venkateshwaran, M, Hirsch S, Miwa H, Downie JA, Morris RJ, Ané JM, Oldroyd GED. (2011) Nuclear membranes control symbiotic calcium signalling of legumes Proc. Natl. Acad. Sci. USA 108:14348-14353 \\
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Ramachandran VK, East AK, Karunakaran R, Downie JA, Poole PS (2011) Adaptation of Rhizobium leguminosarum to pea, alfalfa and sugar beet rhizospheres investigated by comparative transcriptomics. Genome Biol. 12:R106\\
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Xie F, Murray JD, Kim J, Heckmann AB, Edwards A, Oldroyd GED, Downie JA (2011) Legume pectate lyase required for root infection by rhizobia.Proc. Natl. Acad. Sci. U S A. 109: 633-638\\
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Xie F, Williams A, Edwards A,  Downie JA (2012) A plant arabinogalactan-like glycoprotein promotes a novel type of attachment by Rhizobium leguminosarum Molec. Plant-Microbe Interact. 25: 250-258\\
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Prell J, Mulley G, Haufe F, White JP, Williams A, Karunakaran R, Downie JA, Poole, PS (2012) The PTS (Ntr) system globally regulates ATP-dependent transporters in Rhizobium leguminosarum. Molec Microbiol. 84: 117-129\\
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Granqvist E, Wysham D, Hazledine S, Kozlowski W, Sun J, Charpentier, M, Martins, TV, Haleux P, Tsaneva-Atanasova K, Downie JA, Oldroyd GED, Morris RJ (2012) Buffering capacity explains signal variation in symbiotic calcium oscillations. Plant Physiol. 160: 2300-2310\\
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MacLean D, Yoshida K, Edwards A., Crossman L, Clavijo D, Clark M, Swarbreck D, Bashton M, Chapman P, Gijzen M, Caccamo M, Downie A,  Kamoun S, Saunders DG (2013) Crowdsourcing genomic analyses of ash and ash dieback-power to the people. GigaScience 2 (1) 2\\
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Roberts NJ, Morieri G, Kalsi G, Rose A, Stiller J, Edwards A, Xie F, Gresshoff PM, Oldroyd GED, Downie JA, Etzler ME (2013) Rhizobial and mycorrhizal symbioses in Lotus japonicus require lectin nucleotide phosphor-hydrolase, which acts upstream of calcium signaling. Plant Physiol. 161: 556-567.\\
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Morieri G, Martinez E A, Jarynowski A, Driguez H, Morris R, Oldroyd GED, Downie JA (2013) Host-specific Nod-factors associated with Medicago truncatula nodule infection differentially induce calcium influx and calcium spiking in root hairs New Phytol. 200: 656-662\\
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Downie JA (2014) Legume nodulation. Current Biol. 24: R184-R190\\
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Frederix M, Edwards A, Swiderska A, Stanger A, Karunakaran R, Williams A, Abbruscato P, Sanchez-Contreras M, Poole PS, Downie JA (2014) Mutation of praR in Rhizobium leguminosarum enhances root biofilms, improving nodulation competitiveness by increased expression of attachment proteins. Molec. Microbiol. 93: 464-478\\
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Wang ET, Yu N, Bano SA, Liu CW, Miller AJ, Cousins, D, Zhang, XW, Ratet P, Tadege M, Mysore KS, Downie JA, Murray JD, Oldroyd GED, Schultze M (2014) A H+-ATPase that energizes nutrient uptake during mycorrhizal symbioses in rice and Medicago truncatula. Plant Cell 26: 1818-1830\\
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Breakspear A, Liu C, Roy S, Stacey N, Rogers C, Trick M, Morieri G, Mysore KS, Wen J, Oldroyd GED, Downie JA, Murray JD (2014) The root hair "infectome" of Medicago truncatula uncovers changes in cell cycle genes and reveals a requirement for auxin signaling in rhizobial infection. Plant Cell 26: 4680-4701.\\
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Downie JA (2014) Calcium signals in plant immunity: a spiky issue. New Phytol. 204:733-735\\
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Russo DM, Abdian PL, Posadas DM, Williams A, Vozza  N, Giordano W, Kannenberg, E, Downie JA, Zorreguieta A (2015) The O-chain core region of the lipopolysaccharide is required for cellular cohesion and compaction of in vitro and root biofilms developed by Rhizobium leguminosarum. Appl. Environ. Microbiol. 81: 1013-1023\\
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Garcia-Fraile P,  Seaman JC, Karunakaran R, Edwards A, Poole PS, Downie JA (2015) Arabinose and protocatechuate catabolism genes are important for growth of Rhizobium leguminosarum biovar viciae in the pea rhizosphere. Plant & Soil 390: 251-264\\
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Granqvist E, Sun J, Op den Camp R, Pujic P, Hill L, Normand P, Morris RJ, Downie JA, Geurts R, Oldroyd GED (2015) Bacterial-induced calcium oscillations are common to nitrogen-fixing associations of nodulating legumes and nonlegumes. New Phytol. 207: 551-558\\
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Maróti G, Downie JA, Kondorosi É. (2015) Plant cysteine-rich peptides that inhibit pathogen growth and control rhizobial differentiation in legume nodules. Curr. Opin. Plant Biol. 26: 57-63\\
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Rallapalli G; Fraxinus Players, Saunders DG, Yoshida K, Edwards A, Lugo CA, Collin S, Clavijo B, Corpas M, Swarbreck D, Clark M, Downie JA, Kamoun S; Team Cooper, MacLean D. (2015) Lessons from Fraxinus, a crowd-sourced citizen science game in genomics. Elife. 29;4:e07460.\\
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Hood G, Karunakaran R, Downie JA, Poole P (2015)  MgtE from Rhizobium leguminosarum is a Mg2+ channel essential for growth at low pH and N2 fixation on specific plants. Molec. Plant-Microbe Interact. 28:1281-1287\\
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Qiu L, Lin JS, Xu J, Sato S, Parniske M, Wang TL, Downie JA, Xie F  (2015) SCARN a novel class of SCAR protein that is required for root-hair infection during legume nodulation. PLoS Genet. 30;11(10):e1005623\\
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Downie JA and Xie F (2015) A pectate lyase required for plant cell-wall remodelling during infection of legumes by rhizobia. In Biological Nitrogen Fixation, Volume 2 Ed. F.J. de Bruijn, pp 575-581.  John Wiley and Sons\\
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Harper AL, McKinney LV, Nielsen LR, Havlickova L, Li Y, Trick M, Fraser F, Wang L, Fellgett A, Sollars ES, Janacek SH, Downie JA, Buggs RJ, Kjær ED, Bancroft I. (2016) Molecular markers for tolerance of European ash (Fraxinus excelsior) to dieback disease identified using Associative Transcriptomics. Sci Rep. 13;6:19335