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Sandra Jämtgård

Sandra Jämtgård
My research focus on what is plant available nitrogen. What can plants take up from soil and what nitrogen is available to the plant root in the soil. This has led me to focus more and more on the method microdialysis.

Presentation

I am a researcher in ecophysiology. My main interest is the ecophysiology of nitrogen use efficiency in plants and plant-soil interactions. Through my research I want to find out what is plant availability of nitrogen in soil. In particular, I am curious about how plant availability of nitrogen in soil, nitrogen uptake, allocation and metabolism varies in different plant types and environments from a whole plant perspective as well as at cellular and biochemical level. In extension to this, how can this be challenged to potentially increase nitrogen use efficiency and decrease nitrogen pollution in managed environments.

Teaching

SG0148 Ekologi och Trädbiologi

BI1194 Forest Vegetation Ecology

Research

Currently, I am working on the occurrence of organic nitrogen compounds in soil with the soil sampling method microdialysis. With this method sampling is carried out in the microscale with minimal disturbance of the soil and soil processes, which makes it an ideal tool for studying organic nitrogen in soil. Me and colleagues are working on development of the microdialysis method in various directions to investigate plant nitrogen availability. Microdialysis measures induced diffusive fluxes of nitrogen in soil but in addition to this we are also investigating the component of mass flow for nitrogen delivery to the plant root surface. In these projects LC-MS (QQQ) analysis of amino acids and dipeptides and LC-MS (qTOF) quantification of isotopically labelled amino acids and metabolomic screening with GC-MS are used in collaboration with Swedish metabolomics centre (SMC) and SLU Stable isotope laboratory (SSIL).

Microdialysis probe inserted into the soil organic layer in the boreal forest.

Microdialysis probe inserted in agricultural soil.

Syringe pump used in microdialysis sampling.

Background

Education

2010 PhD in Crop Science, Dept of Agr Research for Northern Sweden, SLU, Sweden

2004 MSc in Biology, Swedish University of Agricultural Sciences, Sweden

Positions

2015-present    Researcher, Dept of Forest Ecology and Management, SLU, Sweden

2012-2015         Postdoc, FORMAS, Dept of Forest Ecology and Management, SLU

2012                   Postdoc, University of Queensland, Brisbane, Australia

2010-2011         Postdoc, Dept of Forest Ecology and Management, SLU, Sweden

Supervision

Post docs

Scott Buckley (2018-present)

Mark Swaine (2017-present)

Dörte Randewig (2015-2017)

PhD students

Oskar Forsum (2016, Assistant supervisor)

Olusegun Oyewole (2015, Assistant supervisor)

Students

MSc student in Biology Pia Sundvall (MSc, 2015-2016)

Veronika Link (Internship student, Sept-Dec 2015)

Selected publications

Randewig D, Marshall J, Näsholm T, Jämtgård S. 2019. Combining microdialysis with metabolomics to characterize the in situ composition of dissolved organic compounds in boreal forest soil. Soil Biology & Biochemistry DOI: 10.1016/j.soilbio.2019.107530

Buckley S, Allen D, Brackin R, Jämtgård S, Näsholm T, Schmidt S. 2019. Microdialysis as an in situ technique for sampling soil enzymes. Soil Biology & Biochemistry 135:20-27.

Dion P, Jämtgård S, Bertrand A, Pepin S and Dorais M. 2018. Organic nitrogen uptake and assimilation in Cucumis sativus using position-specific labeling and compound-specific isotope analysis. Frontiers in Plant Science. doi: 10.3389/fpls.2018.01596

Jämtgård S, Robinson N, Moritz T, Colgrave M, Schmidt S. 2018. Optimizing methods for the recovery and quantification of di- and tripeptides in soil. Soil Research 56:404-412

Oyewole O, Inselsbacher E, Näsholm T, Jämtgård S. 2017. Incorporating mass flow strongly promotes N flux rates in boreal forest soils. Soil Biology & Biochemistry 114:263–269.

Buckley S, Brackin R, Näsholm T, Schmidt S, Jämtgård S. 2017. Improving in situ recovery of soil nitrogen using the microdialysis technique. Soil Biology & Biochemistry 114:93-103.

Ganeteg U, Ahmad I, Jämtgård S, Aguetoni Cambui C, Inselsbacher E, Svennerstam H, Schmidt S and Näsholm T. 2017. Amino acid transporter mutants of Arabidopsis provides evidence that a non-mycorrhizal plant acquires organic nitrogen from agricultural soil. Plant Cell and Environment 40: 413-423.

Oyewole O, Jämtgård S, Gruffman L, Inselsbacher E, and Näsholm T. 2016. Soil diffusive fluxes constitute the bottleneck to tree nitrogen nutrition in a Scots pine forest. Plant and Soil 399:109-120.

Czaban W, Jämtgård S, Näsholm T, Rasmussen J, Nicolaisen M and Fomsgaard I. 2016. Direct acquisition of organic N by white clover even in the presence of inorganic N. Plant and Soil 407: 91-107.

Böhlenius H, Övergaard R and Jämtgård S. 2016. Influence of Soil Types on Establishment and Early Growth of Populus trichocarpa. Open Journal of Forestry 6: 361-372.

Gruffman L, Jämtgård S and Näsholm T. 2014. Plant nitrogen status and co-occurrence of organic and inorganic nitrogen sources influence root uptake by Scots pine seedlings. Tree Physiology 34: 205-213.

Inselsbacher E, Öhlund J, Jämtgård S, Huss-Danell K and Näsholm T. 2011. The potential of microdialysis to monitor organic and inorganic nitrogen compounds in soil. Soil Biology & Biochemistry 43: 1321-1332.

Svennerstam H, Jämtgård S, Ahmad I, Huss-Danell K, Näsholm T and Ganeteg, U. 2011. Transporters in Arabidopsis roots mediating uptake of amino acids at naturally-occurring concentrations. New Phytologist 191: 459–467.

Jämtgård S, Näsholm T and Huss-Danell K. 2010. Nitrogen compounds in soil solutions of agricultural land. Soil Biology & Biochemistry 42: 2325-2330.

Jämtgård S, Näsholm T and Huss-Danell K. 2008. Characteristics of amino acid uptake in barley. Plant and Soil 302: 221-231.

Links


Contact
Researcher at the Department of Forest Ecology and Management; Plant-soil organic nitrogen
Telephone: +46-90-786 8443
Postal address:
SLU,
Skogens ekologi och skötsel
901 83 Umeå
Visiting address: Skogsmarksgränd 17, Umeå
Page editor: Sandra.Jamtgard@slu.se