Plant Cell, Tissue and Organ Culture 27: 353-355, 1991 CONTENTS Volume27 1991 Volume 27 No.1 Jacquin-Dubreuil A., Chetrit S., Fliniaux M.A., Trinh T.H., Cosson L. & Tran Thanh Van K.: Study of the alkaloid content of four ‘hypohaploids’’ of Nicotiana plumbaginifolia grown in vitro Gray DJ. & Benton C.M.: In vitro micropropagation and plant establishment of muscadine grape cultivars (Vitis rotundifolia) Laublin G., Saini H.S. & Cappadocia M.: In vitro plant regeneration via somatic embryogenesis from root culture of some rhizomatous irises Mathur J.: Enhanced somatic embryogenesis in Selinum candolii DC. under a mineral oil overlay Tiburcio A.F., Figueras X., Claparols I., Santos M. & Torné J.M.: Improved plant regeneration in maize callus cultures after pretreatment with DL-alpha-difluoromethylarginine Afele J.C. & De Langhe E.: Increasing in vitro germination of Musa balbisiana seed Iapichino G., Chen T.H.H. & Fuchigami L.H.: Plant regeneration from somatic tissue of Rhododendron laetum - aurigeranum Chambers S.M., Heuch J.H.R. & Pirrie A.: Micropropagation and in vitro flowering of the bamboo Dendrocalamus hamiltonii Munro Kvaalen H. & von Arnold S.: Effects of various partial pressures of oxygen and carbon dioxide on different stages of somatic embryogenesis in Picea abies Harvey B.M.R., Crothers S.H., Evans N.E. & Selby C.: The use of growth retardants to improve microtuber formation by potato (Solanum tuberosum) Rout G.R., Debata B.K. & Das P.: Somatic embryogenesis in callus cultures of Rosa hybrida L. cv. Landora Mosquim P.R. & Sodek L.: Culture of soybean fruit explants: growth conditions and efficiency of nitrogen sources for reserve protein synthesis Atkinson N.J., Newbury H.J. & Ford-Lloyd B.V.: In vitro adventitious root induction in Antirrhinum majus L. Linnington I.M.: In vitro propagation of Dipterocarpus alatus and Dipterocarpus intricatus Kuoksa T. & Hohtola A.: Freeze-preservation of buds from Scots pine trees Tremblay L. & Tremblay F.M.: Carbohydrate requirements for the development of black spruce (Picea mariana (Mill.) B.S.P.) and red spruce (P. rubens Sarg.) somatic embryos Fehér A., Felféldi K., Preiszner J. & Dudits D.: PEG-mediated transformation of leaf protoplasts of Solanum tuberosum L. cultivars Volume 27 No. 2 Van Uden W., Pras N., Homan B. & Malingré T.M.: Improvement of the production of 5- methoxypodophyllotoxin using a new selected root culture of Linum flavum L. Abe J., Nakashima H., Mitsui K., Mikami T. & Shimamoto Y.: Tissue culture response of Beta germplasm: callus induction and plant regeneration Ooms G. & Moore K.: A novel assay for genetic and environmental changes in the architecture of intact root systems of plants grown in vitro Hagendoorn M.J.M., Zethof J.L.M., Van Hunnik E. & Van der Plas L.H.W.: Regulation of anthocyanin and lignin synthesis in Petunia hybrida cell suspensions Kataeva N.V., Alexandrova I.G., Butenko R.G. & Dragavtceva E.V.: Effect of applied and internal hormones on vitrification and apical necrosis of different plants cultured in vitro da CAémara Machado M.L., da Camara Machado A., Hanzer V., Kalthoff B., Wei8 H., Mattanovich D., Regner F. & Katinger H.: A new, efficient method using 8-hydroxy-quinolinol-sulfate for the initiation and establishment of tissue cultures of apple from adult material 354 Son S.H., Chun Y.W. & Hall, R.B.: Cold storage of in vitro cultures of hybrid poplar shoots (Populus alba L. x P. grandidentata Michx.) Do C.B. & Cormier F.: Effects of high ammonium concentrations on growth and anthocyanin formation in grape (Vitis vinifera L.) cell suspension cultured in a production medium Falque M., Compan D. & Galzy R.: A method for the study of CO? exchanges in in vitro cultured Vitis rupestris plantlets Orinos Th. & Mitrakos K.: Rhizogenesis and somatic embryogenesis in calli from wild olive (Olea europaea vat. sylvestris (Miller) Lehr) mature zygotic embryos Genga A. & Allavena A.: Factors affecting morphogenesis from immature cotyledons of Phaseolus coccineus L. Sowa S. & Towill L.E.: Effects of nitrous oxide on mitochondrial and cell respiration and growth in Distichlis spicata suspension cultures Preece J.E., Navarrete N, Van Sambeek J.W. & Gaffney G.R.: An in vitro microplant bioassay using clonal white ash to test for tall fescue allelopathy Simonton W., Robacker C. & Krueger S.: A programmable micropropagation apparatus using cycled liquid medium Krueger S., Robacker C. & Simonton W.: Culture of Amelanchier x grandiflora in a programmable micropropagation apparatus Krogstrup P. & Ngrgaard J.V.: Micropropagation of Psiadia coronopus (Lam.) Benth, a threatened endemic species from the island of Rodrigues Volume 27 No.3 Simmonds D.H., Long N.E. & Keller W.A.: High plating efficiency and plant regeneration frequency in low density protoplast cultures derived from an embryogenic Brassica napus cell suspension Vahala T. & Eriksson T.: Callus production from willow (Salix viminalis L.) protoplasts Cousineau J.C. & Donnelly D.J.: Adventitious shoot regeneration from leaf explants of tissue cultured and greenhouse-grown raspberry Waara S., Wallin A., Ottosson A. & Eriksson T.: Factors promoting sustained divisions of mesophyll protoplasts isolated from dihaploid clones of potato (Solanum tuberosum L.) and a cytological analysis of regenerated plants Messner B., Boll M. & Berndt J.: L-Phenylalanine ammonia-lyase in suspension culture cells of spruce (Picea abies). Induction by UV-light and fungal elicitor Van Ark H.F., Zaal M.A.C.M., Creemers-Molenaar J. & Van der Valk P.: Improvement of the tissue culture response of seed-derived callus cultures of Poa pratensis L.: Effect of gelling agent and abscisic acid Ellis D.D., Barczynska H., McCown B.H. & Nelson N.: A comparison of BA, zeatin and thidiazuron for adventitious bud formation from Picea glauca embryos and epicotyl explants Nikova V.M., Zagorska N.A. & Pundeva R.S.: Development of four tobacco cytoplasmic male sterile sources using in vitro techniques Sudarshana M.S. & Shanthamma C.: Jn vitro regeneration from excised leaves of Flaveria trinervia (Sprengel) C. Mohr Hawes M.C., Smith L.Y. & Stephenson M.: Root organogenesis from single cells released from the root cap of Medicago sp. Smith E.F., Roberts A.V., Mottley J. & Denness S.: The preparation in vitro of chrysanthemum for transplantation to soil. 4. The effects of eleven growth retardants on wilting Abu-Qaoud H., Skirvin R.M. & Below F.E.: Influence of nitrogen form and NH4-N/:NO3-N ratios on adventitious shoot formation from pear (Pyrus communis) leaf explants in vitro Dan Y. & Stephens C.T.: Studies of protoplast culture types and plant regeneration from callus-derived protoplasts of Asparagus officinalis L. cv. Lucullus 234 Bertrand-Desbrunais A., Noirot M. & Charrier A.: Minimal growth in vitro conservation of coffee (Coffea spp.). 1. Influence of low concentrations of 6-benzyladenine Arrillaga I., Marzo T. & Segura J.: Micropropagation of juvenile and adult Sorbus domestica L. Instructions to authors Volume contents / Author index Author index Volume 27 1991 Abe J., 123 Ellis D.D., 281 Long N.E., 231 Selby C., 59 Abu-Qaoud H., 315 Eriksson T., 243, 257 Shanthamma C., 297 Afele J.C., 33 Evans N.E., 59 Malingré T.M., 115 Shimamoto Y., 123 Alexandrova I.G., 149 Marzo T., 341 Simmonds D.H., 231 Allavena A., 189 Falque M., 175 Mathur J., 23 Simonton W., 211, 219 Arrillaga L., 341 Fehér A., 105 Mattanovich D., 155 Skirvin R.M., 315 Atkinson N.J., 77 Felféldi K., 105 McCown B.H., 281 Smith E.F., 309 Figueras X., 27 Messner B., 267 Smith L.Y., 303 Barczynska H., 281 Fliniaux M.A., 1 Mikami T., 123 Sodek L., 71 Below F.E., 315 Ford-Lloyd B.V., 77 Mitrakos K., 183 Son S.H., 161 Benton C.M., 7 Fuchigami L.H., 37 Mitsui K., 123 Sowa S., 197 Berndt J., 267 Moore K., 129 Stephens C.T., 321 Bertrand-Desbrunais A., 333 Gaffney G.R., 203 Mosquim P.R., 71 Stephenson M., 303 Boll M., 267 Galzy R., 175 Mottley J., 309 Sudarshana M.S., 297 Butenko R.G., 149 Genga A., 189 Gray D.J., 7 Norgaard J.V., 227 Tiburcio A.F., 27 Cappadocia M., 15 Nakashima H., 123 Torné J.M., 27 Chambers S.M., 45 Hagendoorn M.J.M., 141 Navarrete N, 203 Towill L.E. 197 Charrier A., 333 Hall, R.B., 161 Nelson N., 281 Tran Thanh Van K., 1 Chen T.H.H., 37 Hanzer V., 155 Newbury H.J., 77 Tremblay F.M., 95 Chetrit S., Harvey B.M.R., 59 Nikova V.M., 289 Tremblay L., 95 Chun Y.W., 161 Hawes M.C., 303 Noirot M., 333 Trinh T.H., 1 Claparols I., 27 Heuch J.H.R., 45 Compan D., 175 Hohtola A., 89 Ooms G., 129 Vahala T., 243 Cormier F., 169 Homan B., 155 Orinos Th., 183 Van Ark H.F., 275 Cosson L., 1 Ottosson A., 257 Van der Plas L.H.W., 141 Cousineau J.C., 249 Iapichino G., 37 Van der Valk P., 275 Creemers-Molenaar J., 275 Pirrie A., 45 Van Hunnik E., 141 Crothers S.H., 59 Jacquin-Dubreuil A., Pras N., 115 Van Sambeek J.W., 203 Preece J.E., 203 Van Uden W., 115 da Camara Machado A., 155 Kalthoff B., 155 Preiszner J., 105 von Arnold S., 49 da Camara Machado M.L., 155 Kataeva N.V., 149 Pundeva R.S., 289 Dan Y., 321 Katinger H., 155 Waara S., 257 Das P., 65 Keller W.A., 231 Regner F., 155 Wallin A., 257 De Langhe E., 33 Krogstrup P., 227 Robacker C., 211, 219 Wei8 H., 155 Debata B.K., 65 Krueger S., 211, 219 Roberts A.V., 309 Denness S., 309 Kuoksa T., 89 Rout G.R., 65 Zaal M.A.C.M., 275 Do C.B., 169 Kvaalen H., 49 Zagorska N.A., 289 Donnelly D.J., 249 Saini H.S., 15 Zethof J.L.M., 141 Dragavtceva E.V., 149 Laublin G., 15 Santos M., 27 Dudits D., 105 Linnington I.M., 81 Segura J., 341