Plant and Soil 196: 327-330, 1997 Contents Volume 196 (1997) N.-fixation ability of Brazilian soybean cultivars with Sinorhizobium fredii and Sinorhi- zobium xinjiangensis L.M. de O.Chueire and M. Hugria Methane and nitrous oxide emissions from rice paddy fields as affected by nitrogen fertilisers and water management Z. Cai, G. Xing, X. Yan, H. Xu, H. Tsuruta, K. Yagi and K. Minami Chemical transformation, phytotoxicity and nutrient availability in progressive com- posting stages of wheat straw M.-J. Blanco and G. Almendros Interactions between the root-knot nematode Meloidogyne incognita and Glomus mosseae in banana M.C. Jaizme-Vega, P. Tenoury, J. Pinochet and M. Jaumot Nitrate induced iron deficiency chlorosis in Juncus acutifloris A.J.P. Smolders, R.J.J. Hendriks, H.M. Campschreur and J.G.M. Roelofs High temperature effects on photosynthesis and water relations of grain legumes G.K. McDonald and G.M. Paulsen Analysing the performance of a micro soil solution sampling device in a laboratory examination and a field experiment A. Spangenberg, G. Cecchini and N. Lamersdorf Iron deficiency induces cluster (proteoid) root formation in Casuarina glauca M. Arahou and H.G. Diem Allocation of carbon in a mature eucalypt forest and some effects of soil phosphorus availability H. Keith, R.J. Raison and K.L. Jacobson Biomass accumulation and allocation in soybean associated with genotypic differences in tolerance of nitrogen fixation to water deficits L.C. Purcell, M. de Silva, C.A. King and W.H. Kim 101-113 Effect of soil nitrogen, carbon and moisture on methane uptake by dry tropical forest soils J.S. Singh, Smita Singh, A.S. Raghubanshi, Saranath Singh, A.K. Kashyap and V.S. Reddy 115-121 Apatite as a P source in mycorrhizal and non-mycorrhizal Pinus sylvestris seedlings H. Wallander, T. Wickman and G. Jacks 123-131 Short-term effects of a dung pat on N; fixation and total N uptake in a perennial rye- grass/white clover mixture F.V. Jorgensen and E.S. Jensen 133-141 328 Hydroponic culture of the mycorrhizal fungus Glomus mosseae with Linum usitatissi- mum L., Sorghum bicolor L. and Triticum aestivum L. H.-J. Hawkins and E. George 143-149 Spatial variability of soil total C and N and their stable isotopes in an upland Scottish grassland C.A. Marriott, G. Hudson, D. Hamilton, R. Neilson, B. Boag, L.L. Handley, J. Wishart, C.M. Scrimgeour and D. Robinson 151-162 PLANT NUTRITION FOR SUSTAINABLE FOOD PRODUCTION AND ENVIRONMENT Proceedings of the XIII International Plant Nutrition Colloquium, 13-19 September 1997, Tokyo, Japan Guest editors: T. Ando', K. Fujita', T. Mae?, H. Matsumoto*, S. Mori? and J. Sekiya® ' Hiroshima University, Higashi Hiroshima, Japan, * Tohoku University, Sendai, Japan, 3 Okayama University, Kurashiki, Japan, * University of Tokyo, Tokyo, Japan, Kyoto University, Kyoto, Japan Plant nutrition in the 20th and perspectives for the 21st century J.F. Loneragan 163-174 Application of microinjection techniques to plant nutrition W.J. Lucas 175-189 Regulation of mineral nitrogen uptake in plants N. von Wiren, S. Gazzarrini and W.B. Frommer 191-199 Physiological nitrogen efficiency in rice: Nitrogen utilization, photosynthesis, and yield potential T. Mae 201-210 Does boron play only a structural role in the growing tissues of higher plants? P.H. Brown and H. Hu 211-215 Significance of N source (urea vs. NH,NO,) and Ni supply for growth, urease activity and nitrogen metabolism of zucchini (Cucurbita pepo convar. giromontiina J. Gerendäs and B. Sattelmacher 217-222 Reevaluating the free-ion activity model of trace metal availability to higher plants D.R. Parker and J.F. Pedier 223-228 Possible role of root-ethylene in Fe(lll)-phytometallophore uptake in Strategy Il species R.M. Welch, W.A. Norvell, P. Gesuwan and S. Schaefer 229-232 Detection and characterization of nitrogen circulation through the sieve tubes and xylem vessels of rice plants H. Hayashi, Y. Okada, H. Mano, T. Kume, S. Matsuhashi, N. S-Ishioka, H. Uchida and M. Chino 233-237 Isolation and patch clamp measurements of xylem contact cells for the study of their role in the exchange between apoplast and symplast of leaves M. Keunecke, J.U. Sutter, B. Sattelmacher and U.P. Hansen The froh gene family from Arabidopsis thaliana: Putative iron-chelate reductases N.J. Robinson, Sadjuga and Q.J. Groom 329 Role of rye chromosomes in improvement of zinc efficiency in wheat and triticale |. Cakmak, R. Derici, B. Torun, |. Tolay, H.J. Braun and R. Schlegel 249-253 Root exudation and microflora populations in rhizosphere of crop genotypes differing in tolerance to micronutrient deficiency Z. Rengel 255-260 Phosphorus deficiency enhances root exudation of low-molecular weight organic acids and utilization of sparingly soluble inorganic phosphates by radish Raghanus sativus L.) and rape (Brassica napus L.) plants F.S. Zhang, J. Ma and Y.P. Cao The role of cell wall components from groundnut roots in solubilizing sparingly soluble phosphorus in low fertility soils N. Ae, T. Otani 265-270 Accumulation and transport of nickel in relation to organic acids in ryegrass and maize grown with different nickel levels X.E. Yang, V.C. Baligar, J.C. Foster and D.C. Martens 271-276 Genetic improvement of heavy metal tolerance in plants by transfer of the yeast metal- lothionein gene (CUPT) |. Hasegawa, E. Terada, M. Sunairi, H. Wakita, F. Shinmachi, A. Noguchi, M. Nakajima and J. Yazaki Genetic and physiological analysis of doubled-haploid, aluminium-resistant lines of wheat provide evidence for the involvement of a 23 kD, root exudate polypeptide in mediating resistance U. Basu, J.L. McDonald-Stephens, D.J. Archambault, A.G. Good, K.G. Briggs, Taing-Aung and G.J. Taylor Phosphorus acquisition and cycling in crop and pasture systems in low fertility tropical soils DK. Friesen, |.M. Rao, R.J. Thomas, A. Oberson and J.I. Sanz 289-294 Nitrate-uptake capacity of different root zones of Zea mays (L.) in vitro and in situ G. Reidenbach and W.J. Horst 295-300 Growth stimulatory substances for vesicular-arbuscular mycorrhizal fungi in Bahia grass (Paspalum notatum Flügge.) roots T. Ishii, A. Narutaki, K. Sawada, J. Aikawa, |. Matsumoto and K. Kadoya Transport processes at the plant-fungus interface in mycorrhizal associations: physi- ological studies S.M. Ayling, S.E. Smith, F.A. Smith and P. Kolesik Root colonization and iron nutritional status of a Pseudomonas fluorescens in different plant species P. Marschner, D.E. Crowley and B. Sattelmacher 311-316 Molecular markers linked to genes underlying seedling tolerance for ferrous iron toxi- city P. Wu, A. Luo, J. Zhu, J. Yang, N. Huang and D. Senadhira 317-320 How do nutrients drive growth? |.G. Burns, R.L. Walker and J. Moorby 321-325 Volume contents 327-330 330 Author index 331-332 Instructions to authors 333-335