Photosynthetica 2025, 63(3):267-281 | DOI: 10.32615/ps.2025.024

In honor of Reto Jörg Strasser: A pioneer of chlorophyll a fluorescence research

A. STIRBET1, G. GOVINDJEE2, A. SRIVASTAVA3
1 Newport News, VA 23606, USA
2 Department of Plant Biology, University of Illinois at Urbana-Champaign, 505 South Goodwin Avenue, Urbana, IL 61801, USA
3 Solon, OH 44139, USA

Chlorophyll (Chl) a fluorescence measurements are widely used in the study of photosynthesis, and Reto Strasser is a well-known pioneer in this domain. In 2019, the current authors, together with Vineet Soni, and Neera Bhalla Sarin, celebrated his 75th birthday. Here, we pay tribute to him on his 82nd birthday through a brief description of the key results we had obtained with him, over the years, on the understanding and exploitation of the OJIP Chl a fluorescence transient. The topics of these studies have been quite diverse, from the oxygen clock, the bicarbonate effect in Photosystem II, the adaptability of plants to various stress factors, to mathematical modeling of the OJIP phase, but all based on the application of Chl a fluorescence for the understanding of oxygenic photosynthesis. Additionally, we have included here a list of the authors who have honored Reto Strasser in Photosynthetica in 2020, along with references of their papers.

Additional key words: adaptability of plants to stress; bicarbonate effect in Photosystem II; Chl a fluorescence induction; the JIP-test; modeling the Chl a fluorescence rise OJIP; oxygenic photosynthesis.

Received: July 21, 2025; Accepted: July 28, 2025; Prepublished online: August 7, 2025; Published: October 15, 2025  Show citation

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STIRBET, A., GOVINDJEE, G., & SRIVASTAVA, A. (2025). In honor of Reto Jörg Strasser: A pioneer of chlorophyll a fluorescence research. Photosynthetica, 63(3), 267-281. doi: 10.32615/ps.2025.024
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    103. Guo Y., Zhang Y., Lu Y., Shi J., Chen S., Strasser R.J., Qiang S., Hu Z.: Effect of AtLFNR1 deficiency on chlorophyll a fluorescence rise kinetics OJIP of Arabidopsis. ‒ Photosynthetica 58: 391-398, 2020. Go to original source...
    104. Hajihashemi S., Brestic M., Kalaji H.M., Skalicky M., Noedoost F.: Environmental pollution is reflected in the activity of the photosynthetic apparatus. ‒ Photosynthetica 58: 529-539, 2020. Go to original source...
    105. Horaczek T., D±browski P., Kalaji H.M., Baczewska-D±browska A.H., Pietkiewicz S., Stêpieñ W., Gozdowski D.: JIP-test as a tool for early detection of the macronutrients deficiency in Miscanthus plants. ‒ Photosynthetica 58: 507-517, 2020. Go to original source...
    106. Hungsaprug K., Kojonna T., Samleepan M., Punchkhon C., Ut-Khao W., Kositsup B., Kasettranun W., Siangliw J.L., Toojinda T., Comai L., Plaimas K., Chadchawan S.: Chlorophyll fluorescence, leaf gas exchange, and genomic analysis of chromosome segment substitution rice lines exposed to drought stress. ‒ Photosynthetica 58: 214-227, 2020. Go to original source...
    107. Iermak I., Szabó M, Zavafer A.: Analysis of OJIP transients during photoinactivation of photosystem II indicates the presence of multiple photosensitizers in vivo and in vitro. ‒ Photosynthetica 58: 497-506, 2020. Go to original source...
    108. Janka E., Umetani I., Sposob M., Bakke R.: Photosynthesis response of microalgae (Tetradesmus wisconsinensis) to different inorganic carbon sources probed with chlorophyll fluorescence analysis. ‒ Photosynthetica 58: 236-244, 2020. Go to original source...
    109. Jiménez-Francisco B., Stirbet A., Aguado-Santacruz G.A., Campos H., Conde-Martínez F.V., Padilla-Chacón D., Trejo C., Bernacchi C.J., Govindjee G.: A comparative chlorophyll a fluorescence study on isolated cells and intact leaves of Bouteloua gracilis (blue grama grass). ‒ Photosynthetica 58: 262-274, 2020. Go to original source...
    110. Kalaji H.M., Goltsev V.: FOREWORD to the Special issue in honour of Prof. Reto J. Strasser. ‒ Photosynthetica 58: 1-5, 2020. Go to original source...
    111. Keutgen N., Tomaszewska-Sowa M., Keutgen A.J.: Chlorophyll fluorescence of Nicotiana tabacum expressing the green fluorescent protein. ‒ Photosynthetica 58: 460-467, 2020. Go to original source...
    112. Koller S., Holland V., Brüggemann W.: Seasonal monitoring of PSII functionality and relative chlorophyll content on a field site in two consecutive years: a case study of different oak species. ‒ Photosynthetica 58: 379-390, 2020. Go to original source...
    113. Konôpková A., Húdoková H., Je¾ík M., Kurjak D., Jamnická G., Ditmarová ¥., Gömöry D., Longauer R., Tognetti R., P¹idová E.: Origin rather than mild drought stress influenced chlorophyll a fluorescence in contrasting silver fir (Abies alba Mill.) provenances. ‒ Photosynthetica 58: 549-559, 2020. Go to original source...
    114. Lenk S., Dieleman J.A., Lefebvre V., Heuvelink E., Magán J.J., Palloix A., Van Eeuwijk F.A., Barócsi A.: Phenotyping with fast fluorescence sensors approximates yield component measurements in pepper (Capsicum annuum L.) ‒ Photosynthetica 58: 622-637, 2020. Go to original source...
    115. Perboni A.T., Martinazzo E.G., Moura A.B., Bacarin M.A.: Can be performance indexes used to select plant growth-promoting rhizobacteria? ‒ Photosynthetica 58: 253-261, 2020. Go to original source...
    116. Petrova N., Paunov M., Stoichev S., Todinova S, Taneva S.G., Goltsev V., Krumova S.: Thylakoid membrane reorganization, induced by growth light intensity, affects the plants susceptibility to drought stress. ‒ Photosynthetica 58: 369-378, 2020. Go to original source...
    117. Pires da Costa K.C., Kirmayr Jaquetti R., De Carvalho Gonçalves J.F.: Chlorophyll a fluorescence of Bertholletia excelsa Bonpl. plantations under thinning, liming, and phosphorus fertilization. ‒ Photosynthetica 58: 323-330, 2020.
    118. Plyusnina T.Yu., Khruschev S.S., Degtereva N.S., Konyukhov I.V., Solovchenko A.E., Kouzmanova M., Goltsev V.N., Riznichenko G.Yu., Rubin A.B.: Gradual changes in the photosynthetic apparatus triggered by nitrogen depletion during microalgae cultivation in photobioreactor. ‒ Photosynthetica 58: 443-451, 2020. Go to original source...
    119. Rastogi A., Kovar M., He X., Zivcak M., Kataria S., Kalaji H.M., Skalicky M., Ibrahimova U.F., Hussain S., Mbarki S., Brestic M.: JIP-test as a tool to identify salinity tolerance in sweet sorghum genotypes. ‒ Photosynthetica 58: 518-528, 2020. Go to original source...
    120. Samborska-Skutnik I.A., Kalaji H.M., Sieczko L., B±ba W.: Structural and functional response of photosynthetic apparatus of radish plants to iron deficiency. ‒ Photosynthetica 58: 205-213, 2020. Go to original source...
    121. Sitko K., Rusinowski S., Pogrzeba M., Daszkowska-Golec A., Gieroñ ¯., Kalaji H.M., Malkowski E.: Development and aging of photosynthetic apparatus of Vitis vinifera L. during growing season. ‒ Photosynthetica 58: 186-193, 2020. Go to original source...
    122. Skoczowski A., Rut G., Oliwa J., Kornas A.: Sporulation modifies the photosynthetic activity of sporotrophophyll leaves of Platycerium bifurcatum. ‒ Photosynthetica 58: 488-496, 2020. Go to original source...
    123. Sunil B., Strasser R.J., Raghavendra A.S.: Targets of nitric oxide (NO) during modulation of photosystems in pea mesophyll protoplasts: studies using chlorophyll a fluorescence. ‒Photosynthetica 58: 452-459, 2020. Go to original source...
    124. Swoczyna T., Latocha P.: Monitoring seasonal damage of photosynthetic apparatus in mature street trees exposed to road-side salinity caused by heavy traffic. ‒ Photosynthetica 58: 573-584, 2020. Go to original source...
    125. Swoczyna T., Mojski J., Baczewska-D±browska A.H., Kalaji H.M., Elsheery N.I.: Can we predict winter survival in plants using chlorophyll a fluorescence? ‒ Photosynthetica 58: 433-442, 2020. Go to original source...
    126. Tóth S.Z., Oukarroum A., Schansker G.: Probing the photosynthetic apparatus noninvasively in the laboratory of Reto Strasser in the countryside of Geneva between 2001 and 2009. ‒ Photosynthetica 58: 560-572, 2020. Go to original source...
    127. Tsimilli-Michael M.: Revisiting JIP-test: an educative review on concepts, assumptions, approximations, definitions and terminology. ‒ Photosynthetica 58: 275-292, 2020. Go to original source...
    128. Viljevac Vulvetiæ M., ©paniæ V.: Characterization of photosynthetic performance during natural leaf senescence in winter wheat: multivariate analysis as a tool for phenotypic characterization. ‒ Photosynthetica 58: 301-313, 2020. Go to original source...
    129. Voitsekhovskaja O.V., Apollonov V.I., Murtuzova A.V., Rabadanova C.K., Charnysh M.A., Drozdova I.V., Belyaeva A.I., Kovaleva O.N., Loskutov I.G., Pawlowski K., Demidchik V.V., Tyutereva E.V.: Photosynthetic activity as assessed via chlorophyll a fluorescence suggests a role of potassium channels in root to shoot signaling. ‒ Photosynthetica 58: 608-621, 2020. Go to original source...
    130. Wu H.Y., Dong F.Q., Liu L.A., Shi L., Zhang W.F., Jiang C.D.: Dorsoventral variation in photosynthesis during leaf senescence probed by chlorophyll a fluorescence induction kinetics in cucumber and maize plants. ‒ Photosynthetica 58: 479-487, 2020. Go to original source...
    131. Xiao W., Wang H., Liu W., Wang X., Guo Y., Strasser R.J., Qiang S., Chen S., Hu Z.: Action of alamethicin in photosystem II probed by the fast chlorophyll fluorescence rise kinetics and the JIP-test. ‒ Photosynthetica 58: 358-368, 2020. Go to original source...
    132. Yang Y.-J., Liu T., Zhang S.-B., Huang W.: Photoinhibition of oxygen-evolving complex and photosystem II at chilling stress in the tropical tree species Dalbergia odorifera. ‒ Photosynthetica 58: 245-252, 2020. Go to original source...
    133. Zagorchev L., Traianova A., Teofanova D., Li J., Kouzmanova M., Goltsev V.: Influence of Cuscuta campestris Yunck. on the photosynthetic activity of Ipomoea tricolor Cav. - in vivo chlorophyll a fluorescence assessment. ‒ Photosynthetica 58: 422-432, 2020. Go to original source...
    134. Zhang H., Li X.Y., Chen L.-S., Huang Z.R.: The photosynthetic performance of two Citrus species under long-term aluminum treatment. ‒ Photosynthetica 58: 228-235, 2020. Go to original source...
    135. Zhang H.H., Xu N., Li X., Han Y., Ren J.W., Li M.B., Zhai S., Yang R.Y., Teng Z.Y., Sun G.Y.: Effects of exogenous abscisic acid on the photosynthetic function and reactive oxygen species metabolism of tobacco leaves under drought stress. ‒ Photosynthetica 58: 585-594, 2020. Go to original source...
    136. Zhang L.T., Xu R., Liu J.G.: Efficacy of botanical pesticide for rotifer extermination during the cultivation of Nannochloropsis oculata probed by chlorophyll a fluorescence transient. ‒ Photosynthetica 58: 341-347, 2020. Go to original source...
    137. Zhipinova M., Paunov M., Anev S., Petrova N., Krumova S., Raycheva A., Goltsev V., Tzvetkova N., Taneva S., Sapunov K., Chaneva G.: JIP-test as a tool for early diagnostics of plant growth and flowering upon selected light recipe. ‒ Photosynthetica 58: 399-408, 2020. Go to original source...

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