Počet záznamů: 1
Diffusional Interactions among Marine Phytoplankton and Bacterioplankton: Modelling H2O2 as a Case Study
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SYSNO ASEP 0565459 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Diffusional Interactions among Marine Phytoplankton and Bacterioplankton: Modelling H2O2 as a Case Study Tvůrce(i) Omar, N. M. (CA)
Prášil, Ondřej (MBU-M) RID, ORCID
McCain, J. S. P. (US)
Campbell, D. A. (CA)Číslo článku 821 Zdroj.dok. Microorganisms. - : MDPI
Roč. 10, č. 4 (2022)Poč.str. 19 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova diffusional interactions ; hydrogen peroxide ; phytoplankton ; bacterioplankton Vědní obor RIV EE - Mikrobiologie, virologie Obor OECD Microbiology CEP EF16_027/0007990 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora MBU-M - RVO:61388971 UT WOS 000786113900001 EID SCOPUS 85128899398 DOI 10.3390/microorganisms10040821 Anotace Marine phytoplankton vary widely in size across taxa, and in cell suspension densities across habitats and growth states. Cell suspension density and total biovolume determine the bulk influence of a phytoplankton community upon its environment. Cell suspension density also determines the intercellular spacings separating phytoplankton cells from each other, or from cooccurring bacterioplankton. Intercellular spacing then determines the mean diffusion paths for exchanges of solutes among co-occurring cells. Marine phytoplankton and bacterioplankton both produce and scavenge reactive oxygen species (ROS), to maintain intracellular ROS homeostasis to support their cellular processes, while limiting damaging reactions. Among ROS, hydrogen peroxide (H2O2) has relatively low reactivity, long intracellular and extracellular lifetimes, and readily crosses cell membranes. Our objective was to quantify how cells can influence other cells via diffusional interactions, using H2O2 as a case study. To visualize and constrain potentials for cell-to-cell exchanges of H2O2, we simulated the decrease of [H2O2] outwards from representative phytoplankton taxa maintaining internal [H2O2] above representative seawater [H2O2]. [H2O2] gradients outwards from static cell surfaces were dominated by volumetric dilution, with only a negligible influence from decay. The simulated [H2O2] fell to background [H2O2] within similar to 3.1 mu m from a Prochlorococcus cell surface, but extended outwards 90 mu m from a diatom cell surface. More rapid decays of other, less stable ROS, would lower these threshold distances. Bacterioplankton lowered simulated local [H2O2] below background only out to 1. 2 mu m from the surface of a static cell, even though bacterioplankton collectively act to influence seawater ROS. These small diffusional spheres around cells mean that direct cell-to-cell exchange of H2O2 is unlikely in oligotrophic habits with widely spaced, small cells, moderate in eutrophic habits with shorter cell-to-cell spacing, but extensive within phytoplankton colonies. Pracoviště Mikrobiologický ústav Kontakt Eliška Spurná, eliska.spurna@biomed.cas.cz, Tel.: 241 062 231 Rok sběru 2023 Elektronická adresa https://www.mdpi.com/2076-2607/10/4/821
Počet záznamů: 1