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Temperature-induced response in algal cell surface properties and behavior

Novosel, Nives; Mišić Radić, Tea; Zemla, Joanna; Lekka, Malgorzata; Čačković, Andrea; Kasum, Damir; Legović, Tarzan; Žutinić, Petar; Gligora Udovič, Marija; Ivošević DeNardis, Nadica (2021) Temperature-induced response in algal cell surface properties and behavior. Journal of applied phycology, 34 . pp. 243-259. ISSN 0921-8971

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Microalgae are considered an accurate indicator of ecosystem perturbations induced by global climate change. The present work aims to investigate the alteration of temperature on surface properties and behaviour of three algal species using the complementary surface methods (electrochemical and atomic force microscopy). The results showed that the temperature-induced response of algae is species-specific due to the structural features of the cell envelope. Wall-less algae experience the largest nanomechanical and chemical change, while algae with silicified walls show the pronounced chemical change in the degree of hydrophobicity. Alterations of surface properties suggest a molecular modification of the algal barrier and cytoskeletal rearrangements due to a change in cell size, while algal morphology reveals no change. The physiological activity of cells showed a different organisation of released extracellular substances in the form of fine fibrillar structures, aggregated particles, and dense networks. Both types of algal responses, physiological activity, and molecular modification of the cell barrier determine the cell adhesion and motility. This study highlights the role of surface properties in cell-substrate and cell–cell interactions, which is important for the understanding of algal behaviour at natural interfaces and the mechanism of algal biofilm and aggregate formation in aquatic systems under the stress.

Item Type: Article
Uncontrolled Keywords: Algae ; Adhesion ; Hydrophobicity ; Morphology ; Motility ; Stifness
Subjects: NATURAL SCIENCES > Chemistry
NATURAL SCIENCES > Interdisciplinary Natural Sciences
Divisions: Division for Marine and Enviromental Research
Division of Materials Chemistry
Project titleProject leaderProject codeProject type
Od površinskih svojstava stanica alga do pokazatelja stresa u vodenim ekosustavimaIvošević DeNardis, NadicaIP-2018-01-5840HRZZ
Depositing User: Nives Novosel Vlašić
Date Deposited: 04 Feb 2022 08:44
DOI: 10.1007/s10811-021-02591-0

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