Biological response of protists Haematococcus lacustris and Euglena gracilis to conductive polymer poly (3,4‐ethylenedioxythiophene) polystyrene sulfonate

Letters in Applied MicrobiologyVolume 72, Issue 5 p. 619-625 Original Article Biological response of protists Haematococcus lacustris and Euglena gracilis to conductive polymer poly (3,4-ethylenedioxythiophene) polystyrene sulfonate J. Zhu, J. Zhu orcid.org/0000-0003-3673-6004 Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Fukuoka, JapanSearch for more papers by this authorT. Omura, T. Omura Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, JapanSearch for more papers by this authorM. Wakisaka, Corresponding Author M. Wakisaka wakisaka@life.kyutech.ac.jp orcid.org/0000-0002-0329-1005 Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Fukuoka, Japan Correspondence Minato Wakisaka, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4 Hibikino, Fukuoka 808-0196, Japan. Email: wakisaka@life.kyutech.ac.jpSearch for more papers by this author J. Zhu, J. Zhu orcid.org/0000-0003-3673-6004 Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Fukuoka, JapanSearch for more papers by this authorT. Omura, T. Omura Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, JapanSearch for more papers by this authorM. Wakisaka, Corresponding Author M. Wakisaka wakisaka@life.kyutech.ac.jp orcid.org/0000-0002-0329-1005 Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Fukuoka, Japan Correspondence Minato Wakisaka, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4 Hibikino, Fukuoka 808-0196, Japan. Email: wakisaka@life.kyutech.ac.jpSearch for more papers by this author First published: 10 February 2021 https://doi.org/10.1111/lam.13459Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract Improving the growth and pigment accumulation of microalgae by electrochemical approaches was considered a novel and promising method. In this research, we investigated the effect of conductive polymer poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) dispersible in water on growth and pigment accumulation of Haematococcus lacustris and Euglena gracilis. The results revealed that effect of PEDOT:PSS was strongly cell-dependent and each cell type has its own peculiar response. For H. lacustris, the cell density in the 50 mg·l−1 treatment group increased by 50·27%, and the astaxanthin yield in the 10 mg·l−1 treatment group increased by 37·08%. However, under the high concentrations of PEDOT:PSS treatment, cell growth was significantly inhibited, and meanwhile, the smaller and more active zoospores were observed, which reflected the changes in cell life cycle and growth mode. Cell growth of E. gracilis in all the PEDOT:PSS treatment groups were notably inhibited. Chlorophyll a content in E. gracilis decreased while chlorophyll b content increased in response to the PEDOT:PSS treatment. The results laid a foundation for further development of electrochemical methods to promote microalgae growth and explore the interactions between conductive polymers and microalgae cells. Volume72, Issue5May 2021Pages 619-625 RelatedInformation