Teemu Hölttä


Description of research and teaching

My research fields include the physiology of xylem and phloem transport of water and sugars, xylem cavitation and cavitation reversal, the linkage of xylem and phloem structure and function at the whole tree level, tree’s water and carbon exchange with the atmosphere and soil, cambial growth, soil water relations, the response of stomatal conductance, photosynthesis and growth to drought and freezing, and the development of models to interprete various ecophysiological measurements such as the stem diameter change measurements, stem CO2 efflux measurements, and heat based xylem sap flow measurements.


Curriculum Vitae

CV, Teemu Hölttä 23.9.2018

1. Full name

Teemu Samuli Hölttä, male.

Born 8.6.1975, Turku, Finland.

Nationality Finnish. Residence in Helsinki, Finland.


2. Academic Degrees

Docent, University of Helsinki year 2010, Ecophysiology of trees, Department of Forest Sciences. Doctoral degree (FT) in Physics year 2005, Department of Physics, University of Helsinki.

Master’s degree (FM) in Physics year 2000, Department of Physics, University of Jyväskylä.


3. Current position

Associate Professor (tenure track) in “The Biophysics of Plant Metabolism” at the Department of Forest Sciences, University of Helsinki since 1.1.2016.


4. Previous professional appointments

Assistant Professor (tenure track) in “The Biophysics of Plant Metabolism” at the Department of Forest Sciences, University of Helsinki 1.1.2013- 31.12.2015.


Post-Doctoral researcher (funded by the Finnish Academy) in the Department of Forest Sciences, University of Helsinki. 1.1.2010- 31.12.2012.


Post Doc in University of Helsinki, Department of Forest Ecology 1.7.2007 – 31.12- 2009.


Post Doc in Edinburgh University, Department of Geosciences 1.5.2006-31.8.2007.


PhD student in University of Helsinki, Physics Department 1.5.1999-30.4.2006


6. Major research funding acquired

A four year (2014-2017) research project (497 191 €) from the Finnish Academy: “Impact of phloem-xylem interaction and sink behavior on leaf gas exchange.”


Research grant 47 000 € from Luonnonvarain tutkimussäätiö in 2013-2017, project “Phenology and physiology of birch sap bleeding”


Postdoctoral Researcher’s Project funding (266 690 €) in 2010-2013 from the Finnish Academy: project (#132561) “Linking long-distance water and sugar transport in trees to stomatal control of photosynthesis and growth.”


Research grant form University of Helsinki (119 000 €) 2011-2015 “Ice formation, freezing propagation, winter-embolism and its repair in changing environment: comparison between Pinus sylvestris and Picea abies”.


7. Leadership and supervision experience

3 Doctoral Thesis supervised (Tommy Chan, Lauri Lindfors, Anni Vanhatalo). Currently supervising 3 Doctoral thesis (Teemu Paljakka, Kaisa Rissanen, Sanna Ehonen). Supervised/supervising 2 Post Docs (Anna Lintunen, Yann Salmon). 6 Master’s thesis supervised (Irina Hannukainen, Mikko Kangasmäki, Lauri Lindfors, Teemu Paljakka, Kaisa Rissanen, Laura Nikinmaa). 2 Master’s thesis under supervision.


8. Teaching experience

”Metabolism, growth and structure of trees” (Puiden aineenvaihdunta, kasvu ja rakenne) in Department of Forest Sciences, University of Helsinki in 2012-2018. 4 credits per year


Bachelor’s seminar Department of Forest Sciences 2017-2018, and 2018-2019. 4 credits per year


Half of course: “Finnish tree species” Department of Forest Sciences spring 2018.


Visiting lectures in University of Helsinki ~20 hours in past 5 years.


Half of course “Eco-physiology of forest trees” in Department of Forest Sciences 2007 and 2008.


9. Experience of organising scientific meetings

Chair in IUFRO 2017 conference session “Phloem function and dysfunction under drought” in September 2017, Freiburg, Germany.


11. Other key scientific or academic merits

Member of “Tree Physiology” and “Frontiers in Plant Biophysics and Modeling” editorial review board. Guest editor in Tree Physiology.


Reviewing manuscripts: Plant Physiology, New Phytologist, Plant Cell and Environment, Journal of Experimental Botany, Journal of Theoretical Biology, Tree Physiology, Agricultural and Forest meteorology, Plant and Soil.


Member of The Finnish Society of Forest Science since 2012.


Ad hoc reviewer of research applications for National Science Foundation (USA), German Research Foundation, and Research Foundation Flanders (Belgium)


Invited speaker at Gordon Research Conference: Multiscale Plant Vascular Biology, June 17 – 22, 2018, Mt. Snow, Vermont.


Invited speaker at final COST STReESS meeting in Berlin, Germany 13-14 April 2016.


International workshop on sap flow, Ghent, Belgium, June 2013 (keynote speaker)


Functional structural plant models, Saariselkä, Finland, June 2013 (keynote speaker)


Finnish Plant Science days, May 2013, Helsinki, Finland (invited speaker)


Ecological Society of America, Minneapolis, USA, August 2013 (invited speaker)


Pre-examiner of PhD thesis of Heikki Junninen, Department of Physics, University of Helsinki. 2015.


Opponent for PhD thesis of Gristin Rohula, University of Tartu, Institute of Ecology and Earth Sciences in 27.11. 2018. PhD thesis topic “Effect of endogenous and environmental factors on night-time water flux in deciduous woody tree species”.


Scientific committee of International workshop on sap flow in Ghent 2013 and Fullerton 2018.

Latest publications

  1. Drought impacts on tree phloem: from cell-level responses to ecological significance

    Salmon, Y., Dietrich, L., Sevanto, S., Hölttä, T., Dannoura, M. & Epron, D., Feb 2019, In : Tree Physiology. 39, 2, p. 173-191 19 p.

    Research output: Contribution to journalReview ArticleScientificpeer-review

  2. Introduction to the invited issue on phloem function and dysfunction

    Epron, D., Dannoura, M. & Hölttä, T., Feb 2019, In : Tree Physiology. 39, 2, p. 167-172 6 p.

    Research output: Contribution to journalEditorialScientific

  3. Transpiration directly regulates the emissions of water-soluble short-chained OVOCs

    Rissanen, K., Hölttä, T. & Bäck, J., Oct 2018, In : Plant, Cell and Environment. 41, 10, p. 2288–2298 11 p.

    Research output: Contribution to journalArticleScientificpeer-review

View all (112) »

Latest activities

  1. New Insights to Tree Hydraulics Workshop

    Anna Matilda Lintunen (Attendee), Yann Louis Baptiste Salmon (Attendee), Teemu Ville Santeri Paljakka (Attendee), Teemu Samuli Hölttä (Attendee), Timo Veikko Vesala (Attendee)
    22 Jan 201826 Jan 2018

    Activity: Participating in or organising an event typesOrganisation and participation in conferences, workshops, courses, seminars

  2. Oppintunnin pito puista Myllypuron ala-asteen kuolulla

    Teemu Hölttä (Participant)
    Nov 2013

    Activity: Other activity typesTypes for other activities - External teaching and subject coordination

  3. Meeting of the Ecological Society of America

    Teemu Hölttä (Speaker: Presenter)
    Aug 2013

    Activity: Participating in or organising an event typesOrganisation and participation in conferences, workshops, courses, seminars

View all (30) »

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