Exploring bacteria-induced growth and morphogenesis in the green macroalga order Ulvales (Chlorophyta)

Frontiers in Plant Science
Thomas Wichard

Abstract

Green macroalgae, such as Ulvales, lose their typical morphology completely when grown under axenic conditions or in the absence of the appropriate microbiome. As a result, slow growing aberrant phenotypes or even callus-like morphotypes are observed in Ulvales. The cross-kingdom interactions between marine algae and microorganisms are hence not only restricted by the exchange of macronutrients, including vitamins and nutrients, but also by infochemicals such as bacterial morphogenetic compounds. The latter are a fundamental trait mediating the mutualism within the chemosphere where the organisms interact with each other via compounds in their surroundings. Approximately 60 years ago, pilot studies demonstrated that certain bacteria promote growth, whereas other bacteria induce morphogenesis; this is particularly true for the order of Ulvales. However, only slow progress was made towards the underlying mechanism due to the complexity of, for example, algal cultivation techniques, and the lack of standardized experiments in the laboratory. A breakthrough in this research was the discovery of the morphogenetic compound thallusin, which was isolated from an epiphytic bacterium and induces normal germination restoring the foliaceou...Continue Reading

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Citations

Mar 10, 2015·Frontiers in Plant Science·Thomas WichardJuliet C Coates
Nov 11, 2017·Environmental Microbiology·Matthew A LemayLaura Wegener Parfrey
Jan 10, 2018·Frontiers in Microbiology·July Z FlorezAlejandro H Buschmann
Oct 28, 2018·Journal of Phycology·Sophie SteinhagenFlorian Weinberger
Jun 25, 2017·Annual Review of Phytopathology·Stéphane HacquardPaul Schulze-Lefert
Jul 9, 2020·Environmental Science. Processes & Impacts·Thorben VockenbergPatrick Braeutigam
Apr 30, 2019·Frontiers in Plant Science·Mohsen HajheidariMarcel Bucher
Aug 22, 2018·Frontiers in Pharmacology·Celso AlvesRui Pedrosa
Dec 13, 2018·BioMed Research International·Amel IsmailMonia El Bour
Sep 29, 2020·The New Phytologist·Ruth Schmidt, Mahasweta Saha
Oct 18, 2020·Marine Pollution Bulletin·Giuseppe BonannoMartina Orlando-Bonaca
Jul 3, 2021·Biology·Nancy Weiland-Bräuer
Aug 26, 2021·Environmental Pollution·Stephen Dayana PriyadharshiniNatchimuthu Karmegam
Sep 28, 2021·Journal of Phycology·July Z FlorezAlejandro H Buschmann
Sep 22, 2021·Annual Review of Genetics·James Umen, Matthew D Herron

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Methods Mentioned

BETA
PCR
size-exclusion chromatography
electrophoresis

Software Mentioned

Ulva

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