Sundberg, Björn - Wood Formation


My research interest is within the development and biosynthesis of secondary xylem (wood) formation. My current aim is to translate know-how about the molecular regulation of industrial important traits such as wood biomass, fibre morphology, -ultrastructure and -chemistry into biotechnology solutions for operational forestry and industrial biorefining.

Sundberg Bjorn 1150I have a research track record in studying the physiological and molecular regulation of wood development and wood cell wall biosynthesis.This involves studies on plant hormones,with particular focus on auxin, gibberellins and ethylene, and various enzymes and proteins in wood cell wall biosynthesis. I have also an interest in developing novel tools and analytical technologies designed to study wood formation and wood chemistry. Since 2012 I am responsible to develop forest biotechnology R&D with Stora Enso, a major international forest industry. In this position I am translating academic research into practical solu- tions for plantation forestry and industrial biorefining.

sundberg 1 sundberg 2
We are using in vitro grown aspen trees as an experimental system to perform pharmacological experiments and for initial screening of wood properties. Picture modified from PNAS 2009 106: 5984-5989. Tension wood is formed in leaning stems. The fiber cell wall (A) forms a normal S2 layer, but has an inner wall layer of almost pure cellulose (G), without lignin and hemicelluloses. Individual cellulose microfibrils are seen in B. Picture modified from Current Opinion Plant Biology 2008 11: 293-300 was generously provided by Prof. Geoffrey Daniel, SLU Uppsala.

sweden_greySvensk sammanfattning

Key Publications

  • Vahala J,Felten J,Love J, Gorszas A, Gerber L, Lamminmaki A, Kangasjarvi J, Sundberg B. (2013). A genome-wide screen for ethyle- ne-induced Ethylene Response Factors (ERFs) in hybrid aspen stem identifies ERF genes that modify stem growth and wood properties. New Phytologist 200: 51-522.
  • Gorzsás A, Stenlund H, Persson P, Trygg J, Sundberg B. (2011). Cell specific chemotyping and multivariate imaging by combined FT-IR microspectroscopy and OPLS analysis reveals the chemical landscape of secondary xylem. Plant Journal 66: 903-914.
  • Love J, Bjorklund S, Vahala J, Hertzberg M, Kangasjärvi J, Sundberg B (2009). Ethylene is an endogenous stimulator of cell division in the cambial meristem of Populus. Proc. Natl. Acad. Sci. USA 106: 5984-5989.
  • Andersson Gunnerås S, Mellerowicz EJ, Ohmiya Y, Nilsson P, Henrissat B, Love J, Moritz T. and Sundberg B. (2006). Biosynthesis of cellulose-enriched tension wood in Populus: global analysis of transcripts and metabolites identifies biochemical and developmental regulators in secondary wall biosynthesis. Plant J 45: 144-165
  • Chaffey. N, Cholewa E, Regan S, Sundberg B (2002) Secondary xylem development in Arabidopsis: a model for wood formation. Physiologia Plant 114: 594-600
  • Sterky, F., Regan, S., Karlsson, J., Hertzberg, M., Rohde, A., Holmberg, A., Amini, B., Bhalerao, R., Larsson, M., Villarroel, R., Van Montagu, M., Sandberg, G., Olsson, O., Teeri, T., Boerjan, W., Gustafsson, P., Uhlén, M., Sundberg, B., & Lundeberg, J. (1998). Gene discovery in the woodforming tissues of poplar: analysis of 5692 expressed sequence tags. Proc. Natl. Acad. Sci. USA 95: 13330-13335.
  • Uggla C, Moritz T, Sandberg G, Sundberg B (1996). Auxin as a positional signal in pattern formation in plants.Proc. Natl. Acad. Sci. USA 93: 9282-9286.

CV Dr. Bjorn Sundberg

  • 1983: BSc, Umeå University
  • 1987: PhD, Swedish University of Agricultural Sciences
  • 1991: Docent, Swedish University of Agricultural Sciences
  • 1999: Professor, Swedish University of Agricultural Sciences
  • 2012: Vice President, Forest Biotechnology Stora Enso.

Publications list

  1. AspWood: High-spatial-resolution transcriptome profiles reveal uncharacterized modularity of wood formation in Populus tremula
    Plant Cell. 2017 Jun 27  [Epub ahead of print]
  2. Evaluating the accuracy of genomic prediction of growth and wood traits in two Eucalyptus species and their F1 hybrids
    BMC Plant Biol. 2017, 17(1):110
  3. Protein expression in tension wood formation monitored at high tissue resolution in Populus
    J Exp Bot. 2017 Jun 13 [Epub ahead of print]
  4. Defense responses in aspen with altered pectin methylesterase activity reveal the hormonal inducers of tyloses
    Plant Physiol. 2017, 173(2):1409-1419
  5. Quantitative proteomics reveals protein profiles underlying major transitions in aspen wood development
    BMC Genomics 2016, 17(1):119
  6. High-throughput microanalysis of large lignocellulosic sample sets by Pyrolysis-Gas Chromatography/Mass Spectrometry
    Physiol Plant. 2016, 156(2):127-138
  7. Deficient sucrose synthase activity in developing wood does not specifically affect cellulose biosynthesis, but causes an overall decrease in cell wall polymers
    New Phytol. 2014, 203(4):1220-1230
  8. O-Acetylation of glucuronoxylan in Arabidopsis thaliana wild type and its change in xylan biosynthesis mutants
    Glycobiology. 2014; 24(6):494-506
  9. Ethylene and jasmonic acid act as negative modulators during mutualistic symbiosis between Laccaria bicolor and Populus roots
    New Phytologist 2014, 202(1):270-286

  10. A genome-wide screen for ethylene-induced ethylene response factors (ERFs) in hybrid aspen stem identifies ERF genes that modify stem growth and wood properties
    New Phytol. 2013; 200(2):511-22
  11. Enhanced cellulose orientation analysis in complex model plant tissues
    J Struct Biol. 2013; 183(3):419-28
  12. The Norway spruce genome sequence and conifer genome evolution
    Nature 2013; 497(7451):579-584
  13. Pesquet E, Zhang B, Gorzsás A, Puhakainen T, Serk H, Escamez S, Barbier O, Gerber L, Courtois-Moreau C, Alatalo E, Paulin L, Kangasjärvi J, Sundberg B, Goffner D, Tuominen H
    Non-Cell-Autonomous Postmortem Lignification of Tracheary Elements in Zinnia elegans
    Plant Cell. 2013; 25(4):1314-1328
  14. Ohman D, Demedts B, Kumar M, Gerber L, Gorzsás A, Goeminne G, Hedenström M, Ellis B, Boerjan W, Sundberg B
    MYB103 is required for FERULATE-5-HYDROXYLASE expression and syringyl lignin biosynthesis in Arabidopsis stems
    Plant J. 2012 Sep 12. [Epub ahead of print]
  15. Gerber L, Eliasson M, Trygg J, Moritz T, Sundberg B
    Multivariate curve resolution provides a high-throughput data processing pipeline for pyrolysis-gas chromatography/mass spectrometry
    JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS 2012 95:95-100
  16. Roach M, Gerber L, Sandquist D, Gorzsás A, Hedenström M, Kumar M, Steinhauser MC, Feil R, Daniel G, Stitt M, Sundberg B, Niittylä T
    Fructokinase is required for carbon partitioning to cellulose in aspen wood
    Plant Journal, 2012, 70(6):967 – 977
  17. Gorzsás A, Stenlund H, Persson P, Trygg J, Sundberg B
    Cell-specific chemotyping and multivariate imaging by combined FT-IR microspectroscopy and orthogonal projections to latent structures (OPLS) analysis reveals the chemical landscape of secondary xylem
    The Plant Journal: 2011 66:903-914
  18. Olsson A-M, Bjurhager I, Gerber L, Sundberg B, Salmén L
    Ultra-structural organisation of cell wall polymers in normal and tension wood of aspen revealed by polarisation FTIR microspectroscopy
    Planta: 2011 233:1277-1286
  19. Sundberg B
    Tools and perspectives for molecular breeding of forest tree feedstock
    Journal of Biotechnology: 2011 150:S1114
  20. Bjurhager I, Olsson AM, Zhang B, Gerber L, Kumar M, Berglund LA, Burgert I, Sundberg B, Salmén L
    Ultrastructure and mechanical properties of populus wood with reduced lignin content caused by transgenic down-regulation of cinnemate-4-hydroxylase
    Biomacromolecules: 2010 11:2359-2365
  21. Ranocha P, Denance N, Vanholme R, Freydier A, Martinez Y, Hoffman L, Kohler L, Pouzet C, Renou JP, Sundberg B, Boerjan W, Goffner D
    Walls are thin 1 (WAT1), an Arabidopsis homolog of Medicago truncata NODULIN21, is a tonoplast-localized protein required for secondary wall formation in fibers
    Plant Journal: 2010 63:469-483
  22. McDonnell L, Plett JM, Andersson-Gunnerås S, Kozela C, Dugardeyn J, Van Der Straeten D, Glick BR, Sundberg B, Regan S
    Ethylene levels are regulated by a plant encoded 1-aminocyclopropane-1-carboxylic acid deaminase
    Physiologia Plantarum: 2009 136:94-109
  23. Hedenstrom M, Wiklund-Lindstrom S, Oman T, Lu FC, Gerber L, Schatz P, Sundberg B, Ralph J
    Identification of lignin and polysaccharide modifications in Populus wood by chemometric analysis of 2D NMR spectra from dissolved cell walls
    Molecular Plant: 2009 2:933-942
  24. Kumar M, Thammannagowda S, Bulone V, Chiang V, Han K-H, Joshi CP, Mansfield SD, Mellerowicz E, Sundberg B, Teeri T, Ellis BE
    An update on the nomenclature for the cellulose synthase genes in Populus
    Trends in Plant Science: 2009 14:248-254
  25. Takahashi J, Rudsander UJ, Hedenström M, Banasiak A, Harholt J, Amelot N, Immerzeel P, Ryden P, Endo S, Ibatullin FM, Brumer H, del Campillo E, Master ER, Vibe Scheller H, Sundberg B, Teeri TT, Mellerowicz EJ
    KORRIGAN1 and its aspen homologue PttCel9A1 decrease cellulose crystallinity in Arabidopsis stems
    Plant and Cell Physiology: 2009 50:1099-1115
  26. Love J, Björklund S, Vahala J, Hertzberg M, Kangasjärvi J, Sundberg B
    Ethylene is an endogenous stimulator of cell division in the cambial meristem of Populus
    Proceedings of the National Academy of Sciences: 2009 106(14):5984-5989
  27. Bjurhager I, Berglund LA, Bardage SL, Sundberg B
    Mechanical characterization of juvenile European aspen (Populus tremula) and hybrid aspen (Populus tremula x Populus tremuloides) using full-field strain measurements
    Journal of Wood Science: 2008 54(5):349-355
  28. Rajangam AS, Kumar M, Aspeborg H, Guerriero G, Arvestad L, Pansri P, Brown CJ, Hober S, Blomqvist K, Divne C, Ezcura I, Mellerowicz E, Sundberg B, Bolone V, Teeri TT
    MAP20, a microtubule-associated protein in the secondary cell walls of Populus tremula L. x tremuloides Michx is a target of the cellulose synthesis inhibitor, 2,6- dichlorobenzonitrile
    Plant Physiology: 2008 148:1283-1294
  29. GouéN, Lesage-Descauses MC, Mellerowicz EJ, Magel E, Label P, Sundberg B
    Microgenomic analysis reveals cell type-specific gene expression patterns between ray and fusiform initials within the cambial meristem of Populus
    New Phytologist: 2008 180:45-56
  30. Stenlund H, Gorzsás A, Persson P, Sundberg B, Trygg J
    Orthogonal projections to latent structures discriminant analysis modeling on in situ FT-IR spectral imaging of liver tissue for identifying sources of variability
    Analytical Chemistry: 2008 80:6898-6906
  31. Hedenström M, Wiklund S, Sundberg B, Edlund U
    Visualization and interpretation of OPLS models based on 2D NMR data
    Chemometrics and Intelligent Laboratory Systems: 2008 192:110-117
  32. Mellerowicz EJ, Sundberg B
    Wood cell walls: biosynthesis, developmental dynamics and their implications for wood properties
    Current Opinion in Plant Biology: 2008 11:293-300
  33. Siedlecka A, Wiklund S, Péronne M-A, Micheli F, Lesniewska J, Sethson I, Edlund U, Richard L, Sundberg B, Mellerowicz EJ
    Pectin methyl esterase inhibits intrusive and symplastic cell growth in developing wood cells of Populus
    Plant Physiology: 2008 146:554-565
  34. Leple JC, Dauwe R, Morreel K, Storme V, Lapierre C, Pollet B, Naumann A, Kang KY, Kim H, Ruel K, Lefebvre A, Joseleau JP, Grima-Pettenati J, De Rycke R, Andersson-Gunnerås S, Erban A, Fehrle I, Petit-Conil M, Kopka J, Polle A, Messens E, Sundberg B, Mansfield SD, Ralph J, Pilate G, Boerjan W.
    Downregulation of cinnamoyl-coenzyme A reductase in poplar: multiple-level phenotyping reveals effects on cell wall polymer metabolism and structure
    The Plant Cell: 2007 19:3669-3691
  35. Gray-Mitsumune M, Blomquist K, McQueen-Mason S, Teeri TT, Sundberg B, Mellerowicz EJ
    Ectopic expression of a wood-abundant expansin PttEXPA1 promotes cell expansion in primary and secondary tissues in aspen
    Plant Biotechnology Journal: 2008 6:62-72
  36. Nishikubo N, Awano T, Banasiak A, Bourquin V, Ibatullin F, Funada R, Brumer H, Teeri TT, Hayashi T, Sundberg B, Mellerowicz EJ
    Xyloglucan Endo-transglycosylase (XET) functions in gelatinous layers of tension wood fibers in Poplar - A glimpse into the mechanism of the balancing act of trees
    Plant Cell Physiology: 2007 48:843-855
  37. Björklund S, Antti H, Uddestrand I, Moritz T, Sundberg B
    Cross-talk between gibberellin and auxin in development of Populus wood: gibberellin stimulates polar auxin transport and has a common transcriptome with auxin
    The Plant Journal: 2007 52:499-511
  38. Ubeda-Tomas, S., Edvardsson E, Eland C, Singh SK, Zadik D, Aspeborg H, Gorzsàs A, Teeri TT, Sundberg B, Persson P, Bennet M, Marchant A
    Genomic-assisted identification of genes involved in secondary growth in Arabidopsis utilising transcript profiling of poplar wood-forming tissues
    Physiologia Plantarum: 2007 129:415-428
  39. Andersson-Gunneras S, Mellerowicz EJ, Love J, Segerman B, Ohmiya Y, Coutinho PM, Nilsson P, Henrissat B, Moritz T, Sundberg B
    Biosynthesis of cellulose-enriched tension wood in Populus: global analysis of transcripts and metabolites identifies biochemical and developmental regulators in secondary wall biosynthesis
    The Plant Journal: 2006 45:144-165
  40. Geisler-Lee J, Geisler M, Coutinho PM, Segerman B, Nishikubo N, Takahashi J, Aspeborg H, Djerbi S, Master E, Andersson-Gunneras S, Sundberg B, Karpinski S, Teeri TT, Kleczkowski LA, Henrissat B, Mellerowicz EJ
    Poplar carbohydrate-active enzymes. Gene identification and expression analyses
    Plant Physiology: 2006 140:946-962
  41. Aspeborg H, Schrader J, Coutinho PM, Stam M, Kallas A, Djerbi S, Nilsson P, Denman S, Amini B, Sterky F, Master E, Sandberg G, Mellerowicz E, Sundberg B, Henrissat B, Teeri TT
    Carbohydrate-active enzymes involved in the secondary cell wall biogenesis in hybrid aspen
    Plant Physiol: 2005 137:983-997
  42. Pineau C, Freydier A, Ranocha P, Jauneau A, Turner S, Lemonnier Gt, Renou J-P, Tarkowski P, Sandberg G, Jouanin L, Sundberg B, Boudet A-M, Goffner D, Pichon M
    hca: an Arabidopsis mutant exhibiting unusual cambial activity and altered vascular patterning
    Plant J: 2005 44:271-289
  43. Israelsson M, Sundberg B, Moritz T
    Tissue-specific localization of gibberellins and expression of gibberellin-biosynthetic and signaling genes in wood-forming tissues in aspen
    Plant J: 2005 44:494-504
  44. Sterky F, Bhalerao RR, Unneberg P, Segerman B, Nilsson P, Brunner AM, Campaa LC, Lindvall JJ, Tandre K, Strauss SH, Sundberg B, Gustafsson P, UhlEn M, Bhalerao RP, Nilsson O, Sandberg G, Karlsson J, Lundeberg J, Jansson S
    A Populus EST resource for plant functional genomics
    Proc Natl Acad Sci U S A: 2004 101:13951-13956
  45. Andersson A, Keskitalo J, Sjodin A, Bhalerao R, Sterky F, Wissel K, Tandre K, Aspeborg H, Moyle R, Ohmiya Y, Bhalerao R, Brunner A, Gustafsson P, Karlsson J, Lundeberg J, Nilsson O, Sandberg G, Strauss S, Sundberg B, Uhlen M, Jansson S, Nilsson P
    A transcriptional timetable of autumn senescence
    Genome Biology: 2004 5:R24
  46. Mitsumune MG, Mellerowicz EJ, Abe H, Schrader J, WinzEll A, Sterky F, Blomqvist K, Mason SM, Teeri TT, Sundberg B
    Expansins abundant in secondary xylem belong to subgroup A of the alpha-expansin gene family
    Plant Physiol: 2004 135:1552-1564
  47. Djerbi S, Aspeborg H, Nilsson P, Sundberg B, Mellerowicz E, Blomqvist K, Teeri TT
    Identification and expression analysis of genes encoding putative cellulose synthases (CesA) in the hybrid aspen, Populus tremula (L.) x P-tremuloides (Michx.)
    Cellulose: 2004 11:301-312
  48. Mitsumune MG, Abe H, Takahashi J, Sundberg B, Mellerowicz EJ
    Liquid phase fluorescence in situ RT-PCR analysis for gene expression analysis in woody stems
    Plant Biol (Stuttg): 2004 6:47-54
  49. Hellgren JM, Olofsson K, Sundberg B
    Patterns of auxin distribution during gravitational induction of reaction wood in poplar and pine
    Plant Physiol: 2004 135:212-220
  50. Andersson-Gunneras S, Hellgren JM, Bjorklund S, Regan S, Moritz T, Sundberg B
    Asymmetric expression of a poplar ACC oxidase controls ethylene production during gravitational induction of tension wood
    Plant Journal: 2003 34:339-349
  51. Parker G, Schofield R, Sundberg B, Turner S
    Isolation of COV1, a gene involved in the regulation of vascular patterning in the stem of Arabidopsis
    Development: 2003 130:2139-2148
  52. von Aderkas P, Rohr R, Sundberg B, Gutmann M, Dumont-BeBoux N, Lelu MA
    Abscisic acid and its influence on development of the embryonal root cap, storage product and secondary metabolite accumulation in hybrid larch somatic embryos
    Plant Cell Tissue and Organ Culture: 2002 69:111-120
  53. Chaffey N, Cholewa E, Regan S, Sundberg B
    Secondary xylem development in Arabidopsis: a model for wood formation
    Physiol Plant: 2002 114:594-600
  54. Chaffey N, Barlow P, Sundberg B
    Understanding the role of the cytoskeleton in wood formation in angiosperm trees: hybrid aspen (Populus tremula x P-tremuloides) as the model species
    Tree Physiology: 2002 22:239-249
  55. Shchukarev A, Sundberg B, Mellerowicz E, Persson P
    XPS study of living tree
    Surface and Interface Analysis: 2002 34:284-288
  56. Bourquin V, Nishikubo N, Abe H, Brumer H, Denman S, Eklund M, Christiernin M, Teeri TT, Sundberg B, Mellerowicz EJ
    Xyloglucan endotransglycosylases have a function during the formation of secondary cell walls of vascular tissues
    Plant Cell: 2002 14:3073-3088
  57. Hertzberg M, Aspeborg H, Schrader J, Andersson A, Erlandsson R, Blomqvist K, Bhalerao R, UhlEn M, Teeri TT, Lundeberg J, Sundberg B, Nilsson P, Sandberg G
    A transcriptional roadmap to wood formation
    Proc Natl Acad Sci U S A: 2001 98:14732-14737
  58. Fischer-Iglesias C, Sundberg B, Neuhaus G, Jones AM
    Auxin distribution and transport during embryonic pattern formation in wheat
    Plant Journal: 2001 26:115-129
  59. Uggla C, Magel E, Moritz T, Sundberg B
    Function and dynamics of auxin and carbohydrates during earlywood/latewood transition in scots pine
    Plant Physiol: 2001 125:2029-2039
  60. Mellerowicz EJ, Baucher M, Sundberg B, Boerjan W
    Unravelling cell wall formation in the woody dicot stem
    Plant Mol Biol: 2001 47:239-274
  61. Tuominen H, Puech L, Regan S, Fink S, Olsson O, Sundberg B
    Cambial-region-specific expression of the Agrobacterium iaa genes in transgenic aspen visualized by a linked uidA reporter gene
    Plant Physiology: 2000 123:531-541
  62. Micheli F, Sundberg B, Goldberg R, Richard L
    Radial distribution pattern of pectin methylesterases across the cambial region of hybrid aspen at activity and dormancy
    Plant Physiol: 2000 124:191-199
  63. Regan S, Bourquin V, Tuominen H, Sundberg B
    Accurate and high resolution in situ hybridization analysis of gene expression in secondary stem tissues
    Plant J: 1999 19:363-369
  64. Sitbon F, Hennion S, Little CHA, Sundberg B
    Enhanced ethylene production and peroxidase activity in IAA-overproducing transgenic tobacco plants is associated with increased lignin content and altered lignin composition
    Plant Science: 1999 141:165-173
  65. Strauss S, Boerjan W, Cairney J, Campbell M, Dean J, Ellis D, Jouanin L, Sundberg B
    Forest biotechnology makes its position known
    Nature Biotechnology: 1999 17:1145-1145
  66. Temnerud E, Valinger E, Sundberg B
    Induction of resin pockets in seedlings of Pinus sylvestris L. by mechanical bending stress during growth
    Holzforschung: 1999 53:386-390
  67. Sterky F, Regan S, Karlsson J, Hertzberg M, Rohde A, Holmberg A, Amini B, Bhalerao R, Larsson M, Villarroel R, Van Montagu M, Sandberg G, Olsson O, Teeri TT, Boerjan W, Gustafsson P, Uhlen M, Sundberg B, Lundeberg J
    Gene discovery in the wood-forming tissues of poplar: Analysis of 5,692 expressed sequence tags
    Proceedings of the National Academy of Sciences of the United States of America: 1998 95:13330-13335
  68. Uggla C, Mellerowicz EJ, Sundberg B
    Indole- 3-acetic acid controls cambial growth in Scots pine by positional signaling
    Plant Physiology: 1998 117:113-121
  69. Sundberg B, Uggla C
    Origin and dynamics of indoleacetic acid under polar transport in Pinus sylvestris
    Physiologia Plantarum: 1998 104:22-29
  70. Sundblad LG, Geladi P, Dunberg A, Sundberg B
    The use of image analysis and automation for measuring mitotic index in apical conifer meristems
    Journal of Experimental Botany: 1998 49:1749-1756
  71. Tuominen H, Puech L, Fink S, Sundberg B
    A Radial Concentration Gradient of Indole- 3- Acetic Acid Is Related to Secondary Xylem Development in Hybrid Aspen
    Plant Physiol: 1997 115:577-585
  72. Nilsson O, Tuominen H, Sundberg B, Olsson O
    The Agrobacterium rhizogenes rolB and rolC promoters are expressed in pericycle cells competent to serve as root initials in transgenic hybrid aspen
    Physiologia Plantarum: 1997 100:456-462
  73. Uggla C, Moritz T, Sandberg G, Sundberg B
    Auxin as a positional signal in pattern formation in plants
    Proc Natl Acad Sci U S A: 1996 93:9282-9286
  74. Hampp R, Ecke M, Schaeffer C, Wallenda T, Wingler A, Kottke I, Sundberg B
    Axenic mycorrhization of wild type and transgenic hybrid aspen expressing T-DNA indoleacetic acid-biosynthetic genes
    Trees-Structure And Function: 1996 11:59-64
  75. Moritz T, Sundberg B
    Endogenous cytokinins in the vascular cambial region of Pinus sylvestris during activity and dormancy
    Physiologia Plantarum: 1996 98:693-698
  76. Nilsson O, Moritz T, Sundberg B, Sandberg G, Olsson O
    Expression of the Agrobacterium rhizogenes rolC Gene in a Deciduous Forest Tree Alters Growth and Development and Leads to Stem Fasciation
    Plant Physiol: 1996 112:493-502
  77. Edlund A, Eklof S, Sundberg B, Moritz T, Sandberg G
    A Microscale Technique for Gas- Chromatography Mass- Spectrometry Measurements of Picogram Amounts of Indole- 3- Acetic- Acid in Plant-Tissues
    Plant Physiology: 1995 108:1043-1047
  78. Tuominen H, Sitbon F, Jacobsson C, Sandberg G, Olsson O, Sundberg B
    Altered Growth and Wood Characteristics in Transgenic Hybrid Aspen Expressing Agrobacterium -Tumefaciens T -DNA Indoleacetic -Acid Biosynthetic Genes
    Plant Physiology: 1995 109:1179-1189
  79. Valinger E, Lundqvist L, Sundberg B
    Mechanical Bending Stress Applied During Dormancy and (or) Growth Stimulates Stem Diameter Growth of Scots Pine-Seedlings
    Canadian Journal of Forest Research-Revue Canadienne De Recherche Forestiere: 1995 25:886-890
  80. Tuominen H, Ostin A, Sandberg G, Sundberg B
    A Novel Metabolic Pathway for Indole- 3- Acetic- Acid in Apical Shoots of Populus- Tremula (L) X Populus-Tremuloides (Michx)
    Plant Physiology: 1994 106:1511-1520
  81. Lang V, Mantyla E, Welin B, Sundberg B, Palva ET
    Alterations in Water Status, Endogenous Abscisic-Acid Content, and Expression of Rab18 Gene During the Development of Freezing Tolerance in Arabidopsis-Thaliana
    Plant Physiology: 1994 104:1341-1349
  82. Sundberg B, Tuominen H, Little CHA
    Effects of the Indole- 3- Acetic- Acid (Iaa) Transport Inhibitors N- 1- Naphthylphthalamic Acid and Morphactin on Endogenous Iaa Dynamics in Relation to Compression Wood Formation in 1- Year- Old Pinus- Sylvestris (L) Shoots
    Plant Physiology: 1994 106:469-476
  83. Nylund JE, Wallander H, Sundberg B, Gay G
    Iaa-Overproducer Mutants of Hebeloma-Cylindrosporum Romagnesi Mycorrhizal with Pinus-Pinaster (Ait) Sol and P-Sylvestris L in Hydroponic Culture
    Mycorrhiza: 1994 4:247-250
  84. Valinger E, Lundqvist L, Sundberg B
    Mechanical-Stress During Dormancy Stimulates Stem Growth of Scots Pine-Seedlings
    Forest Ecology and Management: 1994 67:299-303
  85. Wallander H, Nylund JE, Sundberg B
    The Influence of Iaa, Carbohydrate and Mineral Concentration in Host Tissue on Ectomycorrhizal Development on Pinus-Sylvestris L in Relation to Nutrient Supply
    New Phytologist: 1994 127:521-528
  86. Sitbon F, Ostin A, Sundberg B, Olsson O, Sandberg G
    Conjugation of Indole- 3- Acetic- Acid (Iaa) in Wild- Type and Iaa- Overproducing Transgenic Tobacco Plants, and Identification of the Main Conjugates by Frit- Fast Atom Bombardment Liquid- Chromatography Mass- Spectrometry
    Plant Physiology: 1993 101:313-320
  87. Rinne P, Tuominen H, Sundberg B
    Growth-Patterns and Endogenous Indole- 3- Acetic- Acid Concentrations in Current- Year Coppice Shoots and Seedlings of 2 Betula Species
    Physiologia Plantarum: 1993 88:403-412
  88. Sundberg B, Ericsson A, Little CHA, Nasholm T, Gref R
    The Relationship between Crown Size and Ring Width in Pinus- Sylvestris L Stems - Dependence on Indole- 3- Acetic- Acid, Carbohydrates and Nitrogen in the Cambial Region
    Tree Physiology: 1993 12:347-362
  89. Sitbon F, Hennion S, Sundberg B, Little CHA, Olsson O, Sandberg G
    Transgenic Tobacco Plants Coexpressing the Agrobacterium -Tumefaciens -Iaam and Iaah Genes Display Altered Growth and Indoleacetic -Acid Metabolism
    Plant Physiology: 1992 99:1062-1069
  90. Sitbon F, Sundberg B, Olsson O, Sandberg G
    Free and Conjugated Indoleacetic-Acid (Iaa) Contents in Transgenic Tobacco Plants Expressing the Iaam and Iaah Iaa Biosynthesis Genes from Agrobacterium-Tumefaciens
    Plant Physiology: 1991 95:480-485
  91. Sundberg B, Little CHA, Cui K, Sandberg G
    Level of Endogenous Indole- 3- Acetic- Acid in the Stem of Pinus- Sylvestris in Relation to the Seasonal- Variation of Cambial Activity
    Plant Cell and Environment: 1991 14:241-246
  92. Sundberg B, Little CHA, Cui K
    Distribution of Indole -3 -Acetic -Acid and the Occurrence of Its Alkali -Labile Conjugates in the Extraxylary Region of Pinus -Sylvestris Stems
    Plant Physiology: 1990 93:1295-1302
  93. Little CHA, Sundberg B, Ericsson A
    Induction Of Acropetal C-14 Photosynthate Transport And Radial Growth By Indole- 3- Acetic- Acid In Pinus- Sylvestris Shoots
    Tree Physiology: 1990 6:177-189
  94. Sundberg B
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