Helle Juel Martens

Helle Juel Martens

Cand.Hort, PhD

 https://orcid.org/0000-0002-3011-4557

  • Rolighedsvej 23, 1958 Frederiksberg C, 24 Skov & Landskab Baghus, 24-1-F103

19942019

Research activity per year

Personal profile

CV

 
Personal Data

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Title:

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Helle Juel Martens

Associate professor, Ph.D., Cand. Hort.

University of Copenhagen, Faculty of Science, Department of Plant and Environmental Sciences, Thorvaldsensvej 40, 1871 Frederiksberg, Denmark

Office +4535333365   Mobile +4528960218     [email protected]

Education History

1999

 

1992

Ph.D in plant food microscopy, Dept. of Food Science, Danish Institute of Agricultural Sciences (DIAS, Årslev) and KVL

M.Sc. in pollen-stigma incompatibility, KVL and Dept. of Botany, Reading university, UK

 

Employment Record

2006

2005

2001

2000

2000

1994

1993

1989-92

Associate professor, Dept. of Plant and Environmental Sciences, KU

Associate research professor,Dept. of Plant Biology, KVL

Assistant research professor, Dept. of Plant Biology, KVL

Post doc stay at Scottish Crop Research Institute, Dundee, UK

Assistant research professor, Dept. of Food Science, DIAS, Årslev

Ph.D.-student, Dept. of Plant Biology, KVL and Dept. of Food Science, DIAS

Research Assistant at Dept. of Food Science, DIAS, Årslev

Assistant, Dept. of Terrestrial Ecology, Ministry of Environment, DK

 
Leaves

               Maternity leaves from June 1996 to May 1997 and from July 2002 to May 2003

               Study tour in horticulture Aug 1988-Apr1989 Australia, New Zealand and USA

 

Teaching-related tasks

Since 2003

 

Lectures in Basic Plant Biology, Dept.of Plant and Environmental Sciences, KU and Plant Anatomy (Swedish Agricultural University, Alnarp).

Lectures in the PhD-courses Microscopy in Plant Biology (NOVA University Network, Swedish Agricultural University, Alnarp) and Nanobiotechnology, KU.

Practicals in the courses Cell Biology, Basic Plant Biology and Experimental             Molecular Biology, Department of Plant Biology and Biotechnology, KU.

 

Research-related tasks

Since 2001

 

Reviewer for Plant Journal, Protoplasma, Annals of Botany, Tree Physiology, Journal of Food Science and Technology, Biotechnology Journal, Physiologia Plantarum, SSC Grant Pre Award

 

Received external funding

2002

 

2000

Danish Research Agency, grant no. 23010147, Dkr. 661.152, project title “Non-invasive imaging of plant cell-to-cell communication”

Danish Research Agency, grant no. 9901607, Dkr. 1.139.195, project title “Developmental control of intercellular transport in plants studied by bioimaging”

 

Short presentation

My primary research interest is the fascinating field of functional anatomy of plant transport tissue and storage tissue, especially when integrated with other disciplines such as membrane biology, food science, horticulture and biomedicine.

I am part of the Cell Communication Group that studies phloem transport and symplastic pathways. In the group, led by Alexander Schulz, I have developed methods for non-invasive imaging in intact plant tissues using caged fluorescent probes. I have also demonstrated that the endoplasmic reticulum of sieve elements and companion cells in the phloem is continuous through pore-plasmodesmata units, showing that direct membrane trafficking is possible between these cell types (Martens et al. 2006). Cell coupling via plasmodesmata is crucial for the transport of photoassimilates across most cell boundaries from mesophyll to phloem in minor vein tissue as recently shown by us (Liesche et al. 2011). In certain plant groups an apoplastic step is present before phloem loading, in others no hindrance of symplastic transport can be recognized, the differences having major impact on our understanding of phloem loading and phloem transport processes. We are currently working on visualization and quantification of the cell coupling in different plant groups exemplified with poplar, faba beans and pumpkin.

In another line of research I use histochemistry for the localization of storage compound in various tissues, e.g. the exceptional rich African marama bean (Mosele et al. 2011), the localization of bioactive terpenoids within specialized structures of root cork cells of Coleus forskohlii (Pateraki et al. accepted for publication), and the effect of down-regulating enzymes involved in branching and phosphorylation of starch in barley lines (ongoing project with the Starch Group).

Major areas of focus for my current research are also the development of techniques for visualization of yeasts, lipid vesicles and nanodiscs with transmission electron microscopy and techniques for imaging of reactive oxygen species using confocal laser scanning microscopy.

Short presentation

Keywords

  • ???Bioimaging???
  • ???Bioimaging - planter, dyr og mikroorganismer???
  • ???Ekstreme økologiske forhold og ekstreme organismer???
  • ???Planteanatomi???
  • ???Planters opbygning og struktur???
  • ???Planters selvforsvar???
  • ???Planters vækst og udvikling???

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