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. 2021 Nov;258(6):1231-1249.
doi: 10.1007/s00709-021-01644-y. Epub 2021 Apr 30.

The effects of osmotic stress on the cell wall-plasma membrane domains of the unicellular streptophyte, Penium margaritaceum

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The effects of osmotic stress on the cell wall-plasma membrane domains of the unicellular streptophyte, Penium margaritaceum

David S Domozych et al. Protoplasma. 2021 Nov.

Abstract

Penium margaritaceum is a unicellular zygnematophyte (basal Streptophyteor Charophyte) that has been used as a model organism for the study of cell walls of Streptophytes and for elucidating organismal adaptations that were key in the evolution of land plants.. When Penium is incubated in sorbitol-enhance medium, i.e., hyperosmotic medium, 1000-1500 Hechtian strands form within minutes and connect the plasma membrane to the cell wall. As cells acclimate to this osmotic stress over time, further significant changes occur at the cell wall and plasma membrane domains. The homogalacturonan lattice of the outer cell wall layer is significantly reduced and is accompanied by the formation of a highly elongate, "filamentous" phenotype. Distinct peripheral thickenings appear between the CW and plasma membrane and contain membranous components and a branched granular matrix. Monoclonal antibody labeling of these thickenings indicates the presence of rhamnogalacturonan-I epitopes. Acclimatization also results in the proliferation of the cell's vacuolar networks and macroautophagy. Penium's ability to acclimatize to osmotic stress offers insight into the transition of ancient zygnematophytes from an aquatic to terrestrial existence.

Keywords: Acclimatization,; Hechtian strands,; Osmotic stress,; Pectin,; Wall.

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References

    1. Abdul Malik NA, Kumar IS, Nadarajah K (2020) Elicitor and receptor molecules: orchestrators of plant defense and immunity. Int J Mol Sci 21:963. https://doi.org/10.3390/ijms21030963 - DOI - PMC
    1. Affenzeller MJ, Darehshouri A, Andosch A, Lütz C, Lütz-Meindl U (2009a) PCD and autophagy in the unicellular green alga Micrasterias denticulata. Autophagy 5:854–855. https://doi.org/10.4161/auto.8791 - DOI - PubMed
    1. Affenzeller MJ, Darehshouri A, Andosch A, Lütz C, Lütz-Meindl U (2009b) Salt stress-induced cell death in the unicellular green alga Micrasterias denticulata. J Exp Bot 60:939–954. https://doi.org/10.1093/jxb/ern348 - DOI - PubMed - PMC
    1. Ali O, Traas J (2016) Force Driven Polymerization and Turgor-Induced Wall Expansion. Trends Plant Sci 21:398–409. https://doi.org/10.1016/j.tplants.2016.01.019 - DOI - PubMed
    1. An Q, Huckelhoven R, Kogel K-G, van Bel AJE (2006) Multivesicular bodies participate in a cell wall-associated defence response in barley leaves attacked by pathogenic powdery mildew fungus. Cell Microbiol 8:1009–1019. https://doi.org/10.1111/j.1462-5822.2006.00683.x - DOI - PubMed

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