Recent PublicationsThe following two papers are from three years work ! : If you cannot download the .pdfs through your institution website, please email me: rwr[at]icu.ac.jp
Perrine-Walker F.M., Lartaud M., Kouchi H. and Ridge R.W. (2014) Microtubule array formation during root hair infection thread initiation and elongation in the Mesorhizobium-Lotus symbiosis. Protoplasma 251(5):1099-1111. Impact Factor = 3.171
   
Click here to download .pdf (Protoplasma website)
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recent conference papersPerrine-Walker F.M., Lartaud M., Kouchi H. and Ridge R.W. (2013) Endoplasmic reticulum remodeling and tubulin dynamics during root hair infection thread formation in the early events of Mesorhizobium-Lotus symbiosis. Melbourne Cell and Developmental Biology, 6th Annual Meeting, Oct 13th, Australia.
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Refereed PublicationsPerrine-Walker F.M., Lartaud M., Kouchi H. and Ridge R.W. (2014) Microtubule array formation during root hair infection thread initiation and elongation in the Mesorhizobium-Lotus symbiosis. Protoplasma 251:1099-1111. 02/2014 DOI 10.1007/s00709-014-0618-z. Impact Factor = 2.855     Impact Factor = 3.171     Click here to download .pdf (Protoplasma website)   Perrine-Walker F.M., Kouchi H. and Ridge R.W. (2014) Endoplasmic reticulum targeted GFP reveals ER remodelling in Mezorhizobium-treated Lotus japonicus root hairs during root hair curling and infection thread formation. Protoplasma 251:817-826. 12/2013 DOI 10.1007/s00709-013-0584-x. Impact Factor = 3.171     Click here to download .pdf (Protoplasma website)   Hideg Éva, Beáta Vitányi, Annamária Kósa, Katalin Solymosi, Károly Bóka, Sungae Won, Yumi Inoue, Robert W. Ridge, Béla Böddi. (2010) Reactive oxygen species from type-I photosensitized reactions contribute to the light-induced wilting of dark-grown pea (Pisum sativum L.) epicotyls. Physiologia Plantarum 138:485-492. Impact Factor = 3.656     Click here to download pdf.   Kumagai H., Kinoshita E., Ridge R.W., Kouchi H. (2006) RNAi Knockdown of ENOD40s Leads to Significant Suppression of Nodule Formation in Lotus japonicus. Plant Cell Physiology 47(8): 1102-1111. Impact Factor = 4.134     Click here to download pdf.   Vassileva, V.N., H. Kouchi, and R.W. Ridge (2005) Microtubule Dynamics in Living Root Hairs: Transient Slowing by Lipochitin Oligosaccharide Nodulation Signals. Plant Cell 17(6):1-11. Impact Factor = 10.125     Click here to download pdf.   Vassileva, V.N., Y. Fujii, and R.W. Ridge (2005) Microtubule Dynamics in Plants. Plant Biotechnology 22(3): 171-178. Impact Factor = 0.944     Click here to download pdf.   Shimmen T, Ridge RW, Lambiris I, Plazinski J, Yokota E and Williamson RE (2000) Plant myosins. Protoplasma 214: 1-10. Impact Factor = 2.855     Click here to download pdf.   Ridge RW, Uozumi Y, Plazinski J, Hurley U and Williamson RE (1999) Developmental transitions and dynamics of the cortical ER of Arabidopsis cells seen with green fluorescent protein. Plant Cell Physiol. 40(12):1253-1261. Impact Factor = 4.134     Click here to download pdf.   Akao S., Minakawa Y, Taki H, Khan M., Yuhashi K-I, Nakayama Y, Asis CA, Chebotar V, Kang U-G, Minamisawa K and Ridge RW (1999) Use of lacZ and gusA reporter genes to trace the infection process of nitrogen-fixing bacteria. Japan Agricultural Research Quarterly 33(2) 77-84   Ridge R.W., R. Kim and F. Yoshida. (1998) The diversity of lectin-detectable sugar residues on root hair tips of selected legumes correlates with the diversity of their host-ranges for rhizobia. Protoplasma 202: 84-90. Impact Factor = 3.171     Click here to download pdf.   Rolfe B.G., R.W. Carlson, R.W. Ridge, F.B. Dazzo, P.F. Mateos and C.E. Pankhurst. (1996) Defective infection and nodulation of clovers by exopolysaccharide mutants of Rhizobium leguminosarum bv. trifolii. Australian J. Plant Physiology 23: 285-303. Impact Factor = 2.471       Ridge R.W. (1995) Recent developments in the cell and molecular biology of root hairs. J. Plant Research 108: 399-405. Impact Factor = 1.115     Click here to download pdf.   Ridge R.W. (1995) Micro-vesicles, pyriform vesicles and macro-vesicles associated with the plasma membrane in the root hairs of Vicia hirsuta after freeze-substitution. J. Plant Research 108: 363-368. Impact Factor = 1.115     Click here to download pdf.   Plazinski, J., R.W. Ridge, I.A. McKay and M.A. Djordjevic. (1994) The nodABC genes of Rhizobium leguminosarum biovar trifolii confer root hair curling ability to a diverse range of soil bacteria and the ability to induce novel root swellings on beans. Australian Journal of Plant Physiology 21: 311-325. Impact Factor = 2.471       Ridge, R.W., B.G. Rolfe, Y. Jing & E.C. Cocking (1993) Rhizobium nodulation of non-legumes. Symbiosis 14: 345-357. Impact Factor = 1.442       Ridge, R.W. (1993) A model of legume root hair growth and Rhizobium infection. Symbiosis 14: 359-373. Impact Factor = 1.442       Cocking, E.C., M.R. Davey, S.L. Kothari, J.S. Srivastava, Y. Jing, R.W. Ridge and B.G. Rolfe. (1993) Altering the specificity of the interaction between rhizobia and plants. Symbiosis 14:123-130. Impact Factor = 1.442       Ridge, R.W., K.M. Ride and B.G. Rolfe. (1993) Nodule-like Structures Induced on the Roots of Rice Seedlings by Addition of the Synthetic Auxin 2,4-Dichlorophenoxyacetic Acid. Australian Journal of Plant Physiology 20:705-717. Impact Factor = 2.471       Ridge, R.W. and F.D. Sack (1992) Cortical and cap sedimentation in gravitropic Equisetum roots. Am. J. Bot 79(3):328-334. Impact Factor = 2.664       Ridge, R.W., G.L. Bender and B.G. Rolfe. (1992) Nodule-like structures induced on the roots of wheat seedlings by the addition of synthetic auxin 2,4-D, and effects of microorganisms. Australian J. Plant Physiology 19: 481-492. Impact Factor = 2.471       Miao, G-H., M.C. Marsolier, B. Hirel, R.W. Ridge and D.P.S. Verma (1991) Ammonia-regulated expression of a soybean gene encoding cytosolic glutamine synthetase in transgenic Lotus corniculatus. Plant Cell 3:11-22. Impact Factor = 10.125     Click here to download pdf.   Kuo, J., R.W. Ridge and S.V. Lewis (1990) The leaf internal morphology and ultrastructure of Zostera muelleri Irmisch ex Aschers. (Zosteraceae): a comparative study of the intertidal and subtidal forms. Aquatic Botany 36:217-236. Impact Factor = 2.087       Ridge, R.W. (1990) Cytochalasin-D causes organelle-crowding and abnormal ingrowths in legume root hairs. Bot. Mag. Tokyo 103:93-102. Impact Factor = 1.115       Ridge, R.W. (1990) A simple apparatus and technique for the rapid freezing and freeze-substitution of single-cell algae. Japanese J. of Electron Microscopy 39:121-125. Impact Factor = 1.438       Ridge, R.W. (1988) Freeze-substitution improves the ultrastructural preservation of legume root hairs. Bot. Mag. Tokyo 101:427-441. Impact Factor = 1.115       Djordjevic, S.P., R.W. Ridge, H. Chen, J.W. Redmond, M. Batley and B.G. Rolfe (1988) Induction of pathogenic-like responses in the legume Macroptilium atropurpureum Urb. by a transposon-induced mutant of the fast-growing, broad-host-range Rhizobium strain NGR234. J. Bact. 170:1841-1857. Impact Factor = 3.593     Click here to download pdf.   Lloyd, C.W., K.J. Pearce, D.J. Rawlins, R.W. Ridge and P.J. Shaw (1987) Endoplasmic microtubules connect the advancing nucleus to the tip of legume root hairs, but F-actin is involved in basipetal migration. Cell Motility and Cytoskeleton 8:27-36. Impact Factor = 4.190       Rolfe, B.G., J. W. Redmond, M. Batley, H.C. Chen, S.P. Djordjevic, B. Bassam, R.W. Ridge, L. Sargent, F.B. Dazzo and M.A. Djordjevic (1987) Intercellular communication and recognition in the Rhizobium-legume symbiosis. NATO ASI Ser. 4:39-54.   Ridge, R.W. and B.G. Rolfe (1986) Sequence of events during the infection of the tropical legume Macroptilium atropurpureum Urb. by the broad-host-range, fast-growing Rhizobium ANU240. J. Plant Physiol. 122:121-137. Impact Factor = 2.986       Ridge, R.W. and B.G. Rolfe (1986) Lectin binding to the root and root hair tips of the tropical legume Macroptilium atropurpureum Urb. Appl. Envtl. Micro. 51:328-332. Impact Factor = 4.4068     Click here to download pdf.   Ridge, R.W. (1985) Infection of the tropical legume Macroptilium atropurpureum by the broad-host-range Rhizobium strain ANU240. PhD Thesis.   Djordjevic, M.A., P.R. Schofield, R.W. Ridge, N.A. Morrison, B.J. Bassam, J. Plazinski, J.M. Watson and B.G. Rolfe (1985) Rhizobium nodulation genes involved in root hair curling (Hac) are functionally conserved. Plant Mol. Biol. 4:147-160. Impact Factor = 3.518     Click here to download pdf.   Ridge, R.W. and B.G. Rolfe (1985) Rhizobium sp. degradation of legume root hair cell wall at the site of infection thread origin. Appl. Envtl. Micro. 50:717-720. Impact Factor = 4.406     Click here to download pdf.   Morrison, N.A., Y.H. Cen, H.C. Chen, J. Plazinski, R.W. Ridge and B.G. Rolfe (1984) Mobilization of a Sym plasmid from a fast-growing cowpea Rhizobium trifolii strain. J. Bact. 160: 483-487. Impact Factor = 3.593     Click here to download pdf.   Schofield, P.R., R.W. Ridge, B.G. Rolfe, J. Shine and J. M. Watson (1984) Host-specific nodulation is encoded on a 14kb DNA fragment in Rhizobium trifolii trifolii. Plant Mol. Biol. 3:3-11. Impact Factor = 3.518     Click here to download pdf.   Ridge, R.W., W.A. Loneragan, D.T. Bell, I.J. Colquhoun and J. Kuo (1984) Comparative studies in selected species of Eucalyptus used in rehabilitation of the northern jarrah forest, Western Australia. II. Wood and leaf anatomy. Aust. J. Bot. 32:375-386. Impact Factor = 1.666       Colquhoun, I.J., R.W. Ridge, D.T. Bell, W.A. Loneragan and J. Kuo (1984) Comparative studies in selected species of Eucalyptus used in rehabilitation of the northern jarrah forest, Western Australia. I. Patterns of xylem pressure potential and diffusive resistance of leaves. Aust. J. Bot. 32:367-373. Impact Factor = 1.666       Watson, J.M., P.R. Schofield, R.W. Ridge, M.A. Djordjevic, B.G. Rolfe and J. Shine (1983) Molecular cloning and analysis of a region of the Sym plasmid of Rhizobium trifolii encoding clover nodulation functions. In: Plant Molecular Biology, Alan R. Liss, NY. pp 303-318.   |
Books as Chief or co-editor
Book Chapters, Reviews
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Ridge, R.W. (2002) Genetics of Root Development. In: S. Brenner, J.H. Miller (Eds) Encyclopedia of Genetics. Academic Press. |
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Ridge R.W. and Katsumi M. (2002) Root hairs: hormones, and tip molecules. In: Y Waisel, A Eshel, U Kafkafi, (Eds) Plant Roots: The Hidden Half. Marcel Dekker Inc, New York. 3rd edition. |
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Katsumi M, Izumo M and Ridge RW (2000) Hormonal control of root hair growth and development. In: Ridge RW and Emons AMC (Eds) Root Hairs: Cell and molecular biology. Springer-Verlag, Tokyo. |
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Ridge RW and Fredriksson C (2000) Molecules at the tips of root hairs. In: Ridge RW and Emons AMC (Eds) Root Hairs: Cell and molecular biology. Springer-Verlag, Tokyo. |
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Ridge, R.W., T. Hori and S. Miyamura. (1997) Analysis of flagellar movement in Ginkgo biloba sperm by high speed video microscopy. In: (T. Hori, R.W. Ridge, W. Tulecke, J. Tremouillaux-Guiller, P. Del Tredici & H. Tobe, editors) Ginkgo biloba: a global treasure. From Biology to Medicine. Springer-Verlag, Berlin. |
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Ridge R.W. (1996) Root Hairs: Cell Biology and Devel-opment. In: Y Waisel, A Eshel, U Kafkafi, (Eds) Plant Roots: The Hidden Half. Marcel Dekker Inc, New York. 2nd edition. pp 127-147. |
Rolfe, B.G., K.M. Ride & R.W. Ridge (1993) Rhizobium nodulation of non-legumes. In: G.S. Khush and J. Bennett (Eds) Nodulation and nitrogen fixation in rice: potential and prospects. International Rice Research Institute, Los Banos, Philippines. pp. 83-86.   |
Ridge, R.W. (1992) A Practical Guide to Working as a Scientist in Japan. Panther Press, Australia. 83pp. ISBN 0 646 14522 3. [A book written in cooperation with the Australian Academy of Science for research workers going to Japan.]. Also published as hypertext on the World Wide Web at: http://bobridge.uk.   |
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Rolfe, B.G., M.A. Djordjevic, N.A. Morrison, J. Plazinski, G.L. Bender, R.W. Ridge, W. Zurkowski, J.T. Tellam, P.M. Gresshoff and J. Shine (1983) Genetic analysis of the symbiotic regions in Rhizobium trifolii trifolii and Rhizobium trifolii parasponia. In: Molecular Genetics of the Bacteria-Plant Interaction (ed. A. Puhler), pp188-203. Springer-Verlag, Berlin.   |
Conference PresentationsPerrine-Walker F.M., Lartaud M., Kouchi H. and Ridge R.W. (2013) Endoplasmic reticulum remodeling and tubulin dynamics during root hair infection thread formation in the early events of Mesorhizobium-Lotus symbiosis. Melbourne Cell and Developmental Biology, 6th Annual Meeting, Oct 13th, Australia.   Perrine-Walker F., H. Kouchi, and R.W. Ridge. (2007) Effect of cremart on GFP-tubulina6 in root hairs during Lotus-Mesorhizobium interaction. 17th Japanese Society for Plant-Microbe Interactions, Kagoshima University, September.   Perrine-Walker F., H. Kouchi, and R.W. Ridge. (2007) Study of GFP-tubulin a6 in root hairs during Lotus-Mesorhizobium interaction. Japan Soc. Plant Physiol., Ehime, March.   Perrine-Walker F., H. Kouchi, and R.W. Ridge. (2006) Early infection process of Lotus japonicus cv. Gifu by Mesorhizobium loti strain TONO: A microtubule’s perspective. 25th Japanese Society for Root Research, Toyama University, October.   Vassileva, V., R.W. Ridge and H. Kouchi. (2003) Growth dynamics of cortical microtubules in inoculated root hairs of Lotus japonicus. 13th J. Plant-microbe Interactions conference. University of Tokyo, October.   Hirasawa, N., T. Sasaki and R.W. Ridge. (2001) Legume root hair nuclei detect gravity, and rhizobia and Nod factors increase the speed of the response. 12th Annual Meeting of the Japanese Society for Plant-Microbe Interactions, Miyazaki, October.   Ridge R.W., Uozumi Y., Plazinski J., Hurley U., Williamson R.E. (1999) GFP in living plant cells: new findings in cortical ER during development. International symposium of biological nitrogen fixation: signal molecules related to plant and microbe interaction. Kagoshima University.   Ridge R.W., Uozumi Y., Plazinski J., Hurley U., Williamson R.E (1999) Endoplasmic reticulum in root hairs: developmental changes seen by green fluorescent protein (GFP) labelling. Tenth Annual Meeting of the Plant-Microbe Interactions Society of Japan, Kyoto.   Ridge, R.W., R. Kim and F. Yoshida. (1998) The diversity of lectin-detectable sugar residues on root hair tips of selected legumes correlates with the diversity of their host ranges for rhizobia. Eighth Annual Meeting of the Plant-Microbe Interactions Society of Japan, Toba City, Mie Prefecture.   Plazinski, J., Lambiris, I., Hurley, U.A., Ridge, R.W., and Williamson, R.E. (1998) Plant myosins: phenotypic abnormalities in Arabidopsis transgenic plants that express the antisense constructs. Arabidopsis Conference, Madison, USA.   Ridge, R.W., Utsuki M. (1998) Nod factors significantly affect cytoplasmic streaming in alfalfa root hairs. Eighth Annual Meeting of the Plant-Microbe Interactions Society of Japan, Toba City, Mie Prefecture.   Plazinski, J., Lambiris, I., Arioli, T., Hurley, U.A., Ridge, R.W., Burn, J., and Williamson, R.E. (1997) Antisense expression of myosins in transgenic Arabidopsis plants leads to abnormal phenotypes. Proceedings of the 5th International Congress of Plant Molecular Biology, Singapore, September.   Izumo, M., M. Katsumi & R.W. Ridge. (1996) Effect of Uniconazole-P on root hair growth in clover. 23rd Annual Meeting of Plant Growth Regulators Society of America in conjunction with the Japanese Society of Chemical Regulation of Plants, Calgary, Canada.   Ridge, R.W. & M. Utsuki. (1996) Nod factors significantly affect cytoplasmic streaming in alfalfa root hairs. Symposium on Molecular Biology of the Cytoskeleton, Joint Meeting of the Biochemistry and Molecular Biology Society and the Australian Society for Plant Physiology, Canberra, Australia.   Izumo, M., M. Katsumi & R.W. Ridge. (1995) Hormonal control of root hair growth in clover. 15th International conference on plant growth substances. Minneapolis, USA.   Izumo, M., R.W. Ridge & M. Katsumi. (1995) Action of gibberellin on root hair growth. 59th Annual Meeting of the Botanical Society of Japan, Kanazawa.   Kohiyama, M & R.W. Ridge. (1995) Colonisation of nodule-like structures on rice by GUS-labeled Rhizobium leguminosarum bv trifolii. 5th Annual Meeting of the Plant-Microbe Interactions Society of Japan, Kagoshima.   Akao, S., Y. Minagawa, H. Taki, T. Minamizawa & R.W. Ridge. (1995) The construction and use of GUS-labeled Rhizobium. 5th Annual Meeting of the Plant-Microbe Interactions Society of Japan, Kagoshima.   Ridge R.W. (1994) Rhizobium infection of legumes, a model based on freeze-substitution for electron microscopy and anti-cytoskeletal drug treatment of root hairs. 7th International Symposium on Molecular Plant-Microbe Interactions, Edinburgh, Scotland.   Izumo, M., R.W. Ridge & M. Katsumi. (1994) The effects of plant hormones on clover root hair growth. 58th Annual Meeting of the Japanese Botanical Society, Sapporo.   Izumo, M., R.W. Ridge & M. Katsumi. (1994) Effects of plant hormones and plant hormone inhibitors on the growth and morphology of root hairs. Annual Meeting of the Jap. Plant Chemical Regulation Soc., RIKEN, Wako.   Ridge R.W. (1994) The possible role of the cytoskeleton in Rhizobium infection of legumes: a model based on freeze-substitution for electron microscopy. 4th Annual Meeting of the Japanese Plant-Microbe Interactions Society, Okayama.   Ridge R.W. (1993) Membrane-associated vesicles, pyriform vesicles and micro-vesicles in the root hairs of Vicia hirsuta after rapid-freeze, freeze-substitution. XV International Botanical Congress, Yokohama, Japan.   Rolfe, B.G., K.M. Ride & R.W. Ridge (1992) Rhizobium nodulation of non-legumes. International workshop to assess the potential of nodulation and nitrogen fixation in rice. International Rice Research Institute, Philippines.   Djordjevic, M.A., J. Plazinski, R.W. Ridge, I. McKay & B.G. Rolfe (1992) The effects of Rhizobium leguminosarum bv. trifolii nodulation genes in the production of excreted metabolites, root hair curling and nodule induction. Sixth International Symposium on Molecular Plant-Microbe Interactions. Seattle, Washington, USA.   Rolfe, B.G., R.W. Carlson, F.B. Dazzo, P. Mateos, R.W. Ridge & M.A. Djordjevic (1992) Nodulation of clovers by exopolysaccharide mutants of Rhizobium leguminosarum bv. trifolii. Sixth International Symposium on Molecular Plant-Microbe Interactions. Seattle, Washington, USA.   Rolfe, B.G., K.M. Ride & R.W. Ridge (1992) Induction of modified lateral roots as nodule-like structures on the roots of the cereals rice and wheat. Ninth International Congress on Nitrogen Fixation. Cancun, Mexico.   Ridge R.W., K.M. Ride & Rolfe, B.G. (1992) Induction of nodule-like structures on roots of rice and wheat by the synthetic auxin 2,4-dichlorophenoxyacetic acid. Ninth International Congress on Nitrogen Fixation. Cancun, Mexico.   Ridge R.W. (1992) Molecular messengers in the Rhizobium/legume symbiosis. 'Re-directing Australia', Workshop and Conference of the STEP Program, Australian National University, Canberra.   Ridge, R.W. & F.D. Sack (1991) Sedimentation in the cortex as well as in the rootcap in gravitropic Equisetum roots. American Society of Plant Physiology, Albuquerque, New Mexico.   Ridge, R.W. (1991) A model of legume root hair growth and its relevance to Rhizobium infection. 1st International Symbiosis Congress, Jerusalem, Israel.   Ridge, R.W., B.G. Rolfe, Y. Jing, R. Palacios & E.C. Cocking (1991) The Nodulation of Rice by Rhizobium. 1st International Symbiosis Congress, Jerusalem, Israel.   Ridge, R.W. (1989) The rapid-freeze, freeze-substitution method applied to the single-cell alga Carteria crucifera. In: Proceedings of the 54th Annual Meeting of the Botanical Society of Japan, Tohoku University, Sendai   Hori, T., R.W. Ridge, M. Michikawa and S. Miyamura (1988) Ultrastructure of Ginkgo biloba sperm. In: Proceedings of the 53rd Annual Meeting of the Botanical Society of Japan, Okayama.   Ridge, R.W., T. Hori and S. Miyamura (1989) High speed video analysis of living Ginkgo sperm. In: Proceedings of the 2nd Annual Meeting of the Japanese Society of Plant Morphology, Tohoku University, Sendai.   N. Morrison, R.W. Ridge, H. Chen, P. Schofield, B. Bassam, J. Plazinski and B. Rolfe. (1985) Function of infection threads in fast-growing rhizobia. 3rd International Symposium on the Molecular Biology of Plant-Microbe Interactions, Canada.   Ridge, R.W. and B. Rolfe (1984) Infection of the tropical legume Macroptilium atropurpureum. 7th Australian Legume Nodulation Conference, Sydney, Australia.   Morrison, N., H. Chen, B. Bassam, J. Plazinski, R.W. Ridge and B. Rolfe. (1983) Tn5 mutagenesis and symbiotic mutants of a fast-growing cowpea Rhizobium. Proceedings of the 5th International Symposium on Nitrogen Fixation, Noordwijkerhout, Netherlands. With   Schofield, P., M. Djordjevic, R.W. Ridge, B. Rolfe, J. Shine and J. Watson. (1983) Rhizobium trifolii nodulation and nitrogen fixation genes - a genetic and molecular characterisation. Proceedings of the 5th International Symposium on Nitrogen Fixation, Noordwijkerhout, Netherlands.   Olsson, J., B. Rolfe, J. Shine, Plazinski, M. Nayudu, R.W. Ridge and P. Dart. (1983) The biological characterisation of Sesbania rostrata infection by Rhizobium species. Proceedings of the 5th International Symposium on Nitrogen Fixation, Noordwijkerhout, Netherlands.   Rolfe, B., R.W. Ridge, N. Morrison, P. Schofield, B. Bassam, J. Watson, J. Shine and M. Djordjevic. (1983) Conservation of root hair curling (hac) functions in fast-growing rhizobia. Proceedings of the 5th International Symposium on Nitrogen Fixation, Noordwijkerhout, Netherlands.   Schofield, P., R.W. Ridge, M. Djordjevic, B. Rolfe, J. Shine and J. Watson. (1983) Rhizobium trifolii nodulation genes. 9th North American Rhizobium Conference, Cornell University, USA   |