Helle Jakobe Martens

Helle Jakobe Martens

Associate Professor

ORCID: 0000-0002-3011-4557

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  1. Published

    Upgrading the Nutritional Value of PKC Using a Bacillus subtilis Derived Monocomponent β-Mannanase

    Gomez-Osorio, L. M., Nielsen, J. U., Martens, Helle Jakobe & Wimmer, R., 1 Jan 2022, In: Molecules. 27, 2, 14 p., 563.

    Research output: Contribution to journal › Journal article › Research › peer-review

  2. Published

    Transfer of the cytochrome P450-dependent dhurrin pathway from Sorghum bicolor into Nicotiana tabacum chloroplasts for light-driven synthesis

    Gnanasekaran, Thiyagarajan, Karcher, D., Nielsen, A. J. Z., Martens, Helle Jakobe, Ruf, S., Kroop, X., Olsen, C. E., Motawie, Mohammed Saddik, Pribil, Mathias, Møller, Birger Lindberg, Bock, R. & Jensen, Poul Erik, 2016, In: Journal of Experimental Botany. 67, 8, p. 2495-2506 12 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  3. Published

    Trafficking through plasmodesmata: the communication junctions in plants

    Martens, Helle Jakobe, Pina, A., Liu, X. & Schulz, Alexander, 2006. 1 p.

    Research output: Contribution to conference › Poster › Research

  4. Published

    The use of quantitative microscopy to characterize processed carrot texture

    Martens, Helle Jakobe & Kidmose, U., 1998, In: Polish Journal of Food and Nutrition Sciences. 7/48 (2S), p. 37S-42S 6 p.

    Research output: Contribution to journal › Journal article › Research

  5. Published

    The microstructure of plant foods: a qualitative and quantitative analysis

    Martens, Helle Jakobe, 1999, Copenhagen: The Royal Veterinary and Agricultural University, Department of Plant Biology. 50 p.

    Research output: Book/Report › Ph.D. thesis › Research

  6. Published

    The microfluidic network of a plant leaf

    Rademaker, H., Jensen, K. H., Martens, Helle Jakobe, Schulz, Alexander & Bohr, T., 25 May 2016.

    Research output: Contribution to conference › Poster › Research

  7. Published

    The P5A ATPase Spf1p is stimulated by phosphatidylinositol 4-phosphate and influences cellular sterol homeostasis

    Sørensen, D. M., Holen, H. W., Pedersen, J. T., Martens, Helle Jakobe, Silvestro, D., Stanchev, L. D., Costa, S. R., Pomorski, Thomas Guenther, Lopez Marques, Rosa Laura & Palmgren, Michael, 15 Apr 2019, In: Molecular Biology of the Cell. 30, 9, p. 1069-1084

    Research output: Contribution to journal › Journal article › Research › peer-review

  8. Published

    Texture and microstructure of steam cooked, vacuum packed potatoes

    Thybo, A. K., Martens, Helle Jakobe & Lyshede, O. B., 1998, In: Journal of Food Science. 63, 4, p. 692-695 4 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  9. Published

    Symplasmic transport and phloem loading in gymnosperm leaves

    Liesche, J., Martens, Helle Jakobe & Schulz, Alexander, 2011, In: Protoplasma. 248, 1, p. 181-190 10 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  10. Published

    Structural and functional vein maturation in developing tobacco leaves in relation to AtSUC2 promoter activity

    Wright, K. M., Roberts, A. G., Martens, Helle Jakobe, Sauer, N. & Oparka, K. J., 2003, In: Plant Physiology. 131, 4, p. 1555-1565 11 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  11. Published

    Starch bioengineering affects cereal grain germination and seedling establishment

    Shaik, S. S., Carciofi, M., Martens, Helle Jakobe, Hebelstrup, K. & Blennow, Andreas, 2014, In: Journal of Experimental Botany. 65, 9, p. 2257-2270

    Research output: Contribution to journal › Journal article › Research › peer-review

  12. Published

    Scanning electron microscopy image in: Food Chemistry 68 (2000),191–199. Hydroperoxide formation in rapeseed oil encapsulated in a glassy food model as influenced by hydrophilic and lipophilic radicals. Authors: V. Orlien, AB Andersen, T Sinkko, LH Skibsted

    Martens, Helle Jakobe, 2000

    Research output: Non-textual form › Sound/Visual production (digital) › Research › peer-review

  13. Published

    SVR4 (suppressor of variegation 4) and SVR4-like: two proteins with a role in proper organization of the chloroplast genetic machinery

    Powikrowska, M., Khrouchtchova, A., Martens, Helle Jakobe, Nielsen, A. J. Z., Melonek, J., Schulz, Alexander, Krupinska, K., Rodermel, S. & Jensen, Poul Erik, 2014, In: Physiologia Plantarum. 150, 3, p. 477-492 16 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  14. Published

    Quantitative microscopy by use of image analysis

    Martens, Helle Jakobe, 1997, Dina notat. Ringgaard Kristensen, A. (ed.). 62 ed. Den Kongelige Veterinær- og Landbohøjskole, Institut for Husdyrbrug og Husdyrsundhed, Dinas Forskerskole, p. 19 1 p.

    Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research

  15. Published

    Quantification of plasmodesmatal ER coupling between sieve elements and companion cells using fluorescence redistribution after photobleaching (FRAP)

    Martens, Helle Jakobe, Robert, A. G., Oparka, K. J. & Schulz, Alexander, 2007. 1 p.

    Research output: Contribution to conference › Poster › Research

  16. Published

    Quantification of plasmodesmatal endoplasmic reticulum coupling between sieve elements and companion cells using fluorescence redistribution after photobleaching

    Martens, Helle Jakobe, Roberts, A. G., Oparka, K. J. & Schulz, Alexander, 2006, In: Plant Physiology. 142, 2, p. 471-480 10 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  17. Published

    Quantification of Symplasmic Phloem Loading Capacity with Live-Cell Microscopy

    Martens, Helle Jakobe, Gao, C. & Liesche, J., 2019, Phloem: Methods and Protocols. Liesche, J. (ed.). Vol. 2014. p. 215-221 7 p. (Methods in Molecular Biology).

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research › peer-review

  18. Published

    Proximate composition, histochemical analysis and microstructural localisation of nutrients in immature and mature seeds of marama bean (Tylosema esculentum) – an underutilised food legume

    Mosele, M. M., Hansen, Åse Solvej, Hansen, M., Schulz, Alexander & Martens, Helle Jakobe, 2011, In: Food Chemistry. 127, 4, p. 1555-1561 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  19. Published

    Proteomic and microscopic approaches in understanding mechanisms of shell-loosening of shrimp (Pandalus borealis) induced by high pressure and protease

    Dang, T. T., Jessen, F., Martens, Helle Jakobe, Gringer, N., Olsen, Karsten, Bøknæs, N. & Orlien, Vibeke, 2019, In: Food Chemistry. 289, p. 729-738 10 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  20. Published

    Polyploidy – A tool in adapting trees to future climate changes? A review of polyploidy in trees

    Ræbild, Anders, Anamthawat-Jónsson, K., Egertsdotter, U., Immanen, J., Jensen, A. M., Koutouleas, Tina, Martens, Helle Jakobe, Nieminen, K., Olofsson, Jill Katharina, Röper, A. C., Salojärvi, J., Strömvik, M., Vatanparast, Mohammad & Vivian-Smith, A., 2024, In: Forest Ecology and Management. 560, 14 p., 121767.

    Research output: Contribution to journal › Review › Research › peer-review

  21. Published

    Photoactivation of caged probes - microinjection without injection

    Martens, Helle Jakobe, Hansen, M. & Schulz, Alexander, 2001. 2 p.

    Research output: Contribution to conference › Conference abstract for conference › Research

  22. Published

    Photoactivation and other fluorescence techniques for studies on graft compatibility

    Martens, Helle Jakobe, 2008. 1 p.

    Research output: Contribution to conference › Conference abstract for conference › Research

  23. Published

    Phloem loading: functionality of plasmodesmata between mesophyll cells and sieve element/companion cell complexes

    Martens, Helle Jakobe & Schulz, Alexander, 2003. 1 p.

    Research output: Contribution to conference › Conference abstract for conference › Research

  24. Published

    Phloem development and function probed with a companion-cell marker

    Wright, K. M., Roberts, A. G., Martens, Helle Jakobe, Sauer, N. & Oparka, K. J., 2003, In: Annual report. 2002/2003, p. 118-121 4 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  25. Published

    Oxidative stress associated with rootstock-scion interactions in pear/quince combinations during early stages of graft development

    Irisarri, P., Binczycki, P., Errea, P., Martens, Helle Jakobe & Pina, A., 2015, In: Journal of Plant Physiology. 176, p. 25-35 11 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  26. Published

    Outdoor cultivation of a novel isolate of the microalgae Scenedesmus sp. and the evaluation of its potential as a novel protein crop

    Olsen, M. F. L., Pedersen, J. S., Thomsen, Sune Tjalfe, Martens, Helle Jakobe, Petersen, A. & Jensen, Poul Erik, 2021, In: Physiologia Plantarum. 173, 2, p. 483-494

    Research output: Contribution to journal › Journal article › Research › peer-review

  27. Published

    Non-invasive investigation into plasmodesmal regulation using novel confocal laser scanning microscopic techniques and caged compounds

    Martens, Helle Jakobe, Hansen, M. & Schulz, Alexander, 2002. 1 p.

    Research output: Contribution to conference › Conference abstract for conference › Research

  28. Published

    Naturen i Danmark: Mikroskopfotos

    Martens, Helle Jakobe, 2010, Skovene, Gyldendal A/S.

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Communication

  29. Published

    Multi-species colloidosomes by surface-modified lactic acid bacteria with enhanced aggregation properties

    Jiang, X., Martens, Helle Jakobe, Shekarforoush, E., Muhammed, Musemma Kedir, Whitehead, K. A., Arneborg, Nils & Risbo, Jens, 2022, In: Journal of Colloid and Interface Science. 622, p. 503-514

    Research output: Contribution to journal › Journal article › Research › peer-review

  30. Published

    Mikroskopbilleder til: Schulz A.Bioimaging- et vindue til cellernes liv. KVL Forskning

    Martens, Helle Jakobe, 2004

    Research output: Non-textual form › Sound/Visual production (digital) › Communication

  31. Published

    Mikroskopbilleder til: Schulz A. Nok se, men ikke røre, KVL Beretning

    Martens, Helle Jakobe, 2001

    Research output: Non-textual form › Sound/Visual production (digital) › Communication

  32. Published

    Manoyl oxide (13R), the biosynthetic precursor of forskolin, is synthesized in specialized root cork cells in Coleus forskohlii

    Pateraki, Irini, Andersen-Ranberg, Johan, Hamberger, B., Heskes, A. M., Martens, Helle Jakobe, Zerbe, P., Bach, S. S., Møller, Birger Lindberg, Bohlmann, J. & Hamberger, B. R., 2014, In: Plant Physiology. 164, 3, p. 1222-1236 15 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  33. Low frequency ultrasonics for texture measurements in cooked carrots (Daucus carota L.)

    Nielsen, M. & Martens, Helle Jakobe, 1997, In: Journal of Food Science. 62, 6, p. 1167-1175 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  34. Published

    Low frequency ultrasonics for texture measurements in carrots (Daucus carota L.) in relation to water loss and storage

    Nielsen, M., Martens, Helle Jakobe & Kaack, K., 1998, In: Postharvest Biology and Technology. 14, p. 297-308 12 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  35. Published

    Lab manual for plant anatomy

    Martens, Helle Jakobe & Schulz, Alexander, 2005, Frederiksberg: Samfundslitteratur. 46 p.

    Research output: Book/Report › Compendium/lecture notes › Education

  36. Published

    Lab Manual for Plant Anatomy

    Martens, Helle Jakobe & Schulz, Alexander, 2007, Faculty of Life Sciences, University of Copenhagen, p. 1-10, 10 p.

    Research output: Working paper

  37. Published

    Intra- and intercellular trafficking via the ER-membrane studied by FRAP

    Martens, Helle Jakobe & Schulz, Alexander, 2004, Scientific program and abstratcs. p. 130 1 p.

    Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research

  38. Published

    Intercropping effect on root growth and nitrogen uptake at different nitrogen levels

    Ramirez-Garcia, J., Martens, Helle Jakobe, Quemada, M. & Thorup-Kristensen, Kristian, 2015, In: Journal of Plant Ecology. 8, 4, p. 380-389 10 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  39. Published

    Influence of temperature and ageing of ovules and pollen on reproductive success in Trifolium repens L.

    Jakobsen, H. B. & Martens, Helle Jakobe, 1994, In: Annals of Botany. 74, p. 493-501 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  40. Published

    Impaired Cuticle Functionality and Robust Resistance to Botrytis cinerea in Arabidopsis thaliana Plants With Altered Homogalacturonan Integrity Are Dependent on the Class III Peroxidase AtPRX71

    Lorrai, R., Francocci, F., Gully, K., Martens, Helle Jakobe, De Lorenzo, G., Nawrath, C. & Ferrari, S., 16 Aug 2021, In: Frontiers in Plant Science. 12, 18 p., 696955.

    Research output: Contribution to journal › Journal article › Research › peer-review

  41. Published

    Identification of an algal xylan synthase indicates that there is functional orthology between algal and plant cell wall biosynthesis

    Jensen, J. K., Busse-Wicher, M., Poulsen, C. P., Fangel, J. U., Smith, P. J., Yang, J., Pena, M., Dinesen, M. H., Martens, Helle Jakobe, Melkonian, M., Wong, G. K., Moremen, K. W., Wilkerson, C. G., Scheller, H. V., Dupree, P., Ulvskov, Peter, Urbanowicz, B. R. & Harholt, J., 2018, In: New Phytologist. 218, 3, p. 1049-1060

    Research output: Contribution to journal › Journal article › Research › peer-review

  42. Published

    Hvad taler planterne om?

    Martens, Helle Jakobe, 2005, In: Naturens Verden. 5, p. 16-21 6 p.

    Research output: Contribution to journal › Journal article › Communication

  43. Published

    Graft union formation and cell-to-cell communication via plasmodesmata in compatible and incompatible stem unions of Prunus spp.

    Pina, A., Errea, P. & Martens, Helle Jakobe, 2012, In: Scientia Horticulturae. 143, p. 144-150 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  44. Published

    Enzymatic solubilisation and degradation of soybean fibre demonstrated by viscosity, fibre analysis and microscopy

    Ravn, J. L., Martens, Helle Jakobe, Pettersson, D. & Pedersen, N., 2015, In: Journal of Agricultural Science. 7, 9, 13 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  45. Published

    Endoplasmic reticulum - A functional pathway for cell-to-cell trafficking in plants.

    Martens, Helle Jakobe, 2008. 1 p.

    Research output: Contribution to conference › Poster › Research

  46. Published

    Endomembrane coupling between sieve element and companion cell

    Martens, Helle Jakobe, Roberts, A. G., Oparka, K. & Schulz, Alexander, 2006. 1 p.

    Research output: Contribution to conference › Conference abstract for conference › Research

  47. Published

    Directionality of Plasmodesmata-Mediated Transport in Arabidopsis Leaves Supports Auxin Channeling

    Gao, C., Liu, X., De Storme, N., Jensen, K. H., Xu, Q., Yang, J., Liu, X., Chen, S., Martens, Helle Jakobe, Schulz, Alexander & Liesche, J., 2020, In: Current Biology. 30, 10, p. 1970-1977 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  48. Published

    Direct Comparison of Leaf Plasmodesma Structure and Function in Relation to Phloem-Loading Type

    Liesche, J., Gao, C., Binczycki, P., Andersen, S. R., Rademaker, H., Schulz, Alexander & Martens, Helle Jakobe, 2019, In: Plant Physiology. 179, 4, p. 1768-1778 11 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  49. Published

    Developmental changes in cytosolic coupling between epidermis cells as visualized by photoactivation of fluorescein

    Liu, X., Martens, Helle Jakobe & Schulz, Alexander, 2006. 1 p.

    Research output: Contribution to conference › Conference abstract for conference › Research

  50. Published

    Development of the strophiole in seeds of white clover (Trifolium repens L.)

    Martens, Helle Jakobe, Jakobsen, H. & Lyshede, O., 1995, In: Seed Science Research. 5, p. 171-176

    Research output: Contribution to journal › Journal article › Research › peer-review

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