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Gunnar Öquist

Gunnar Öquist

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Plant Science and Agronomy
Sweden
2026

D-Index & Metrics

Plant Science and Agronomy

D-Index
75
Citations
17627
World Ranking
549
National Ranking
8

Research.com Recognitions

  • 2026 - Research.com Plant Science and Agronomy in Sweden Leader Award
  • 2025 - Research.com Plant Science and Agronomy in Sweden Leader Award
  • 2022 - Research.com Plant Science and Agronomy in Sweden Leader Award
  • 2004 - Member of Academia Europaea

Overview

What is he best known for?

The fields of study he is best known for:

  • Photosynthesis
  • Botany
  • Enzyme

Gunnar Öquist mainly focuses on Photosynthesis, Botany, Photoinhibition, Photosystem II and Chlorophyll. His work deals with themes such as Biophysics, Cold acclimation and Scots pine, which intersect with Photosynthesis. His research integrates issues of Cyanobacteria, Synechococcus, Phycobiliprotein and Light intensity in his study of Biophysics.

His study in Botany is interdisciplinary in nature, drawing from both Ecology, Quantum yield and Horticulture. His study looks at the relationship between Photoinhibition and topics such as Evergreen, which overlap with Chlororespiration, Thylakoid and Overwintering. His Chlorophyll research integrates issues from Instrumentation, Pigment, Xanthophyll and Biochemistry.

His most cited work include:

  • Energy balance and acclimation to light and cold (805 citations)
  • Chlorophyll Fluorescence Analysis of Cyanobacterial Photosynthesis and Acclimation (601 citations)
  • Photosynthesis of overwintering evergreen plants. (425 citations)

What are the main themes of his work throughout his whole career to date?

Gunnar Öquist mainly investigates Photosynthesis, Botany, Photoinhibition, Photosystem II and Chlorophyll. His studies deal with areas such as Biophysics, Electron transport chain and Horticulture as well as Photosynthesis. His Botany research is multidisciplinary, relying on both Chloroplast and Fluorescence.

Gunnar Öquist has researched Photoinhibition in several fields, including Xanthophyll, Agronomy and Light effect. His research in Photosystem II intersects with topics in Photochemistry, Synechococcus and Photosynthetic reaction centre. The Chlorophyll study combines topics in areas such as Light intensity, Poaceae, Hordeum vulgare and Chlorophyll a.

He most often published in these fields:

  • Photosynthesis (64.33%)
  • Botany (49.12%)
  • Photoinhibition (32.16%)

What were the highlights of his more recent work (between 1998-2018)?

  • Photosynthesis (64.33%)
  • Photosystem II (32.16%)
  • Botany (49.12%)

In recent papers he was focusing on the following fields of study:

His primary scientific interests are in Photosynthesis, Photosystem II, Botany, Photosystem I and Cold acclimation. His specific area of interest is Photosynthesis, where Gunnar Öquist studies Photoinhibition. As part of one scientific family, Gunnar Öquist deals mainly with the area of Photoinhibition, narrowing it down to issues related to the Cold hardening, and often Herbaceous plant.

Gunnar Öquist combines subjects such as Photochemistry, Photoprotection, Thylakoid and Photosynthetic pigment with his study of Photosystem II. His Botany study combines topics from a wide range of disciplines, such as Cold stress, Biophysics and Chloroplast. His work in Photosystem I addresses issues such as Photosystem, which are connected to fields such as Plastoquinone.

Between 1998 and 2018, his most popular works were:

  • Photosynthesis of overwintering evergreen plants. (425 citations)
  • Intermittent low temperatures constrain spring recovery of photosynthesis in boreal Scots pine forests (173 citations)
  • Two different strategies for light utilization in photosynthesis in relation to growth and cold acclimation (136 citations)

In his most recent research, the most cited papers focused on:

  • Photosynthesis
  • Botany
  • Enzyme

Photosystem II, Photosynthesis, Botany, Photoinhibition and Photochemistry are his primary areas of study. The concepts of his Photosystem II study are interwoven with issues in Arabidopsis thaliana, Carbonic anhydrase and Chlamydomonas reinhardtii. His biological study spans a wide range of topics, including Cold acclimation and Scots pine.

Gunnar Öquist studies Botany, focusing on Chlorophyll in particular. His research in Photoinhibition intersects with topics in Xanthophyll and Evergreen. His Biochemistry study combines topics from a wide range of disciplines, such as Cyanobacteria and Synechococcus sp..

Best Publications

  • Energy balance and acclimation to light and cold

    Norman P.A Huner;Gunnar Öquist;Fathey Sarhan

  • Chlorophyll Fluorescence Analysis of Cyanobacterial Photosynthesis and Acclimation

    Douglas Campbell;Vaughan Hurry;Adrian K. Clarke;Petter Gustafsson

  • Photosynthesis of overwintering evergreen plants.

    Gunnar Öquist;Norman P.A. Huner

  • Photosynthesis, photoinhibition and low temperature acclimation in cold tolerant plants.

    Norman P. A. Huner;Gunnar Öquist;Vaughan M. Hurry;Marianna Krol

  • Photoinhibition of photosynthesis represents a mechanism for the long-term regulation of photosystem II.

    Gunnar Öquist;W. S. Chow;Jan M. Anderson

  • Seasonal changes in photosystem II organisation and pigment composition in Pinus sylvestris

    Christina Ottander;Douglas Campbell;Gunnar Öquist

  • Chlorophyll fluorescence as a tool in photosynthesis research

    Unknown

  • Cold Hardening of Spring and Winter Wheat and Rape Results in Differential Effects on Growth, Carbon Metabolism, and Carbohydrate Content.

    Vaughan M. Hurry;Åsa Strand;Maria Tobiaeson;Per Gardeström

  • Effects of low temperature on photosynthesis

    Gunnar Öquist

  • A PORTABLE, MICROPROCESSOR OPERATED INSTRUMENT FOR MEASURING CHLOROPHYLL FLUORESCENCE KINETICS IN STRESS PHYSIOLOGY

    Gunnar Öquist;Roland Wass

  • The effects of cadmium on photosynthesis of Phaseolus vulgaris – a fluorescence analysis

    Zbigniew Krupa;Gunnar Öquist;Norman P. A. Huner

  • Intermittent low temperatures constrain spring recovery of photosynthesis in boreal Scots pine forests

    Ingo Ensminger;Dmitry Sveshnikov;Douglas A. Campbell;Christiane Funk

  • Mechanistic differences in photoinhibition of sun and shade plants.

    Gunnar Öquist;Jan M. Anderson;Stephanie McCaffery;W. S. Chow

  • Cold acclimation and photoinhibition of photosynthesis in Scots pine

    Alla Krivosheeva;Da-Li Tao;Christina Ottander;Gunnar Wingsle

  • The cyanobacterium Synechococcus resists UV-B by exchanging photosystem II reaction-center D1 proteins

    Douglas Campbell;Mats-Jerry Eriksson;Gunnar Öquist;Petter Gustafsson

  • Chlorophyll a/b-Binding Proteins, Pigment Conversions, and Early Light-Induced Proteins in a Chlorophyll b-less Barley Mutant

    Mariana Krol;Michael D. Spangfort;Norman P. A. Huner;Gunnar Oquist

  • Two different strategies for light utilization in photosynthesis in relation to growth and cold acclimation

    L Savitch;E D Leonardos;M Krol;Stefan Jansson

  • Effects of a Short-Term Shift to Low Temperature and of Long-Term Cold Hardening on Photosynthesis and Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase and Sucrose Phosphate Synthase Activity in Leaves of Winter Rye (Secale cereale L.)

    Vaughan M. Hurry;Gunilla Malmberg;Per Gardestrom;Gunnar Oquist

  • COLD-HARDENING-INDUCED RESISTANCE TO PHOTOINHIBITION OF PHOTOSYNTHESIS IN WINTER RYE IS DEPENDENT UPON AN INCREASED CAPACITY FOR PHOTOSYNTHESIS

    Gunnar Öquist;Norman P. A. Huner

  • Photoinhibition and Reactivation of Photosynthesis in the Cyanobacterium Anacystis nidulans

    Göran Samuelsson;Anders Lönneborg;Eva Rosenqvist;Peter Gustafsson

  • Effects of drought on photosynthesis, chlorophyll fluorescence and photoinhibition susceptibility in intact willow leaves

    E Ogren;Gunnar Oquist

  • Expression of the isiA gene is essential for the survival of the cyanobacterium Synechococcus sp. PCC 7942 by protecting photosystem II from excess light under iron limitation.

    Youn‐Il Park;Stefan Sandström;Petter Gustafsson;Gunnar Öquist

  • Effects of cold acclimation on the susceptibility of photosynthesis to photoinhibition in Scots pine and in winter and spring cereals: a fluorescence analysis.

    Gunnar Oquist;Npa Huner

  • Photoinhibition of photosynthesis in Lemna gibba as induced by the interaction between light and temperature. I: Photosynthesis in vivo

    Erling Ögren;Gunnar Öquist;Jan‐Erlik Hällgren

  • Inhibition of photosynthesis by freezing temperatures and high light Levels in cold‐acclimated seedlings of Scots pine (Pinus sylvestris). ‐ I. Effects on the light‐limited and light‐saturated rates of CO2 assimilation

    Martin Strand;Gunnar Öquist

  • Effects of frost hardening, dehardening and freezing stress on in vivo chlorophyll fluorescence of seedlings of Scots pine (Pinus sylvestris L.)

    M Strand;Gunnar Oquist

  • Recovery of photosynthesis in winter‐stressed Scots pine

    Christina Ottander;Gunnar Öquist

  • Cold acclimation of Arabidopsis thaliana results in incomplete recovery of photosynthetic capacity, associated with an increased reduction of the chloroplast stroma

    Leonid V. Savitch;Johan Barker-Astrom;Alexander G. Ivanov;Vaughan Hurry

Frequent Co-Authors

Alexander G. Ivanov
Alexander G. Ivanov University of Western Ontario
Norman P. A. Huner
Norman P. A. Huner University of Western Ontario
Petter Gustafsson
Petter Gustafsson Umeå University
Vaughan Hurry
Vaughan Hurry Swedish University of Agricultural Sciences
Douglas A. Campbell
Douglas A. Campbell Mount Allison University
Youn-Il Park
Youn-Il Park Chungnam National University
Per Gardeström
Per Gardeström Umeå University
Zbigniew Krupa
Zbigniew Krupa Maria Curie-Skłodowska University
Stefan Jansson
Stefan Jansson Umeå University
Gunnar Wingsle
Gunnar Wingsle Swedish University of Agricultural Sciences

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