| Title: | Photosynthetic activity in both algae and cyanobacteria changes in response to cues of predation |
| Author(s): | Grzesiuk M; Pietrzak B; Wacker A; Pijanowska J; |
| Address: | "Department of Hydrobiology, Faculty of Biology, Institute of Functional Biology and Ecology, University of Warsaw Biological and Chemical Research Centre, Warszawa, Poland. Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences (SGGW), Warszawa, Poland. Department of Ecology and Ecosystem Modelling, Institute of Biochemistry and Biology, University of Potsdam, Potsdam, Germany. Department of Animal Ecology, Zoological Institute and Museum, University of Greifswald, Greifswald, Germany" |
| ISSN/ISBN: | 1664-462X (Print) 1664-462X (Electronic) 1664-462X (Linking) |
| Abstract: | "A plethora of adaptive responses to predation has been described in microscopic aquatic producers. Although the energetic costs of these responses are expected, with their consequences going far beyond an individual, their underlying molecular and metabolic mechanisms are not fully known. One, so far hardly considered, is if and how the photosynthetic efficiency of phytoplankton might change in response to the predation cues. Our main aim was to identify such responses in phytoplankton and to detect if they are taxon-specific. We exposed seven algae and seven cyanobacteria species to the chemical cues of an efficient consumer, Daphnia magna, which was fed either a green alga, Acutodesmus obliquus, or a cyanobacterium, Synechococcus elongatus (kairomone and alarm cues), or was not fed (kairomone alone). In most algal and cyanobacterial species studied, the quantum yield of photosystem II increased in response to predator fed cyanobacterium, whereas in most of these species the yield did not change in response to predator fed alga. Also, cyanobacteria tended not to respond to a non-feeding predator. The modal qualitative responses of the electron transport rate were similar to those of the quantum yield. To our best knowledge, the results presented here are the broadest scan of photosystem II responses in the predation context so far" |
| Keywords: | Daphnia Pam biotic stress grazing phenotypic plasticity photosystem phytoplankton predation; |
| Notes: | "PubMed-not-MEDLINEGrzesiuk, Malgorzata Pietrzak, Barbara Wacker, Alexander Pijanowska, Joanna eng Switzerland 2022/08/13 Front Plant Sci. 2022 Jul 25; 13:907174. doi: 10.3389/fpls.2022.907174. eCollection 2022" |
