Decision-making of the benthic diatom <i>Seminavis robusta</i> searching for inorganic nutrients and pheromones

Bondoc, Karen Grace V.; Lembke, Christine; Lang, Stefan N.; Germerodt, Sebastian; Schuster, Stefan; Vyverman, Wim; Pohnert, Georg

doi:10.1038/s41396-018-0299-2

Cited by 21 publications

(12 citation statements)

References 39 publications

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“…Nutrient and mate-searching behavior may partially explain species interactions in complex. The model diatom Seminavis robusta D.B.Danielidis & D.G.Mann uses chemokinetic and chemotactic motility toward silicate, an important nutrient, but when the need for sex to restore the initial cell ANNUAL LITERATURE REVIEW size increases, S. robusta switches to pheromone-guided search for a mating partner (Bondoc et al, 2019). Learning more about cell behaviors can increase understanding of assemblage structure dynamics.…”

Section: Algal Ecologymentioning

confidence: 99%

Substratum‐associated microbiota

Furey

Lee

Clemans

2020

Water Environment Research

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Highlights of new, interesting, and emerging research findings on substratum-associated microbiota covered from a survey of 2019 literature from primarily freshwaters provide insight into research trends of interest to the Water Environment Federation and others interested in benthic, aquatic environments. Coverage of topics on bottom-associated or attached algae and cyanobacteria, though not comprehensive, includes new methods, taxa new-to-science, nutrient dynamics, auto-and heterotrophic interactions, grazers, bioassessment, herbicides and other pollutants, metal contaminants, and nuisance, and bloom-forming and harmful algae. Coverage of bacteria, also not comprehensive, focuses on the ecology of benthic biofilms and microbial communities, along with the ecology of microbes like Caulobacter crescentus, Rhodobacter, and other freshwater microbial species. Bacterial topics covered also include metagenomics and metatranscriptomics, toxins and pollutants, bacterial pathogens and bacteriophages, and bacterial physiology. Readers may use this literature review to learn about or renew their interest in the recent advances and discoveries regarding substratum-associated microbiota. © 2020 Water Environment Federation • Practitioner points • This review of literature from 2019 on substratum-associated microbiota presents highlights of findings on algae, cyanobacteria, and bacteria from primarily freshwaters. • Coverage of algae and cyanobacteria includes findings on new methods, taxa new to science, nutrient dynamics, auto-and heterotrophic interactions, grazers, bioassessment, herbicides and other pollutants, metal contaminants, and nuisance, bloomforming and harmful algae. • Coverage of bacteria includes findings on ecology of benthic biofilms and microbial communities, the ecology of microbes, metagenomics and metatranscriptomics, toxins and pollutants, bacterial pathogens and bacteriophages, and bacterial physiology. • Highlights of new, noteworthy and emerging topics build on those from 2018 and will be of relevance to the Water Environment Federation and others interested in benthic, aquatic environments

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Section: Algal Ecologymentioning

confidence: 99%

Substratum‐associated microbiota

Furey

Lee

Clemans

2020

Water Environment Research

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“…In the planktonic diatom P. multistriata a pheromone is suggested to synchronize the sexual events (Scalco et al 2014) whereas three different consecutively induced pheromones are thought to be involved in the reproduction of the freshwater diatom Pseudostaurosira trainorii to control sexualization of cells and orientate gametes (Sato et al 2011). Mating of S. robusta was studied intensively and is also promoted by three distinct pheromones (Bilcke et al 2020;Bondoc et al 2019;Bondoc et al 2016;Chepurnov et al 2002). Two sex inducing pheromones SIP + and SIPare produced by mt + and mt¯, respectively, and synchronize the cell cycle (Moeys et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Pheromone Mediated Sexual Reproduction of Pennate Diatom Cylindrotheca Closterium

Klapper

Audoor

Vyverman

et al. 2021

Preprint

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Benthic diatoms dominate primary production in marine subtidal and intertidal environments. Their extraordinary species diversity and ecological success is thought to be linked with their motility and predominantly heterothallic sexual reproduction. Little is known about pheromone involvement during mating of pennate diatoms. Here we describe pheromone guided mating in the coastal raphid diatom Cylindrotheca closterium. We show that the two mating types (mt+ and mt¯) have distinct functions. Similar to other benthic diatoms, mt+ cells are searching for the mt¯ cells to pair. To enhance mating efficiency mt¯ exudes an attraction pheromone, which we proved by establishing a novel capillary assay. Further, two more pheromones produced by mt¯ promote the sexual events. One arrests the cell cycle progression of mt+ while the other induces gametogenesis of mt+. We suggest that C. closterium shares a functionally similar pheromone system with other pennate diatoms like Seminavis robusta and Pseudostaurosira trainorii which synchronize sexual events and mate attraction. Remarkably, we found no evidence of mt+ producing pheromones, which differentiates C. closterium from other pennates and suggests a less complex pheromone system in C. closterium.

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“…This relatively large-sized (∼70 µm initial cell size) raphid pennate diatom inhabits shallow marine and brackish zones and has been reported from the North Sea, the Mediterranean and the Pacific ocean [28,29,30]. In culture, S. robusta cells display typical benthic behaviour, including surface attachment, biofilm formation and vigorous gliding motility, which has been exploited to study chemotaxis [31]. Cultures from strain 85A have been popular for transcriptomics experiments [32,33,34,35].…”

Section: Introductionmentioning

confidence: 99%

Diurnal transcript profiling of the diatomSeminavis robustareveals adaptations to a benthic lifestyle

Bilcke

Osuna-Cruz

Silva

et al. 2020

Preprint

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Coastal regions contribute an estimated 20% of annual gross primary production in the oceans, despite occupying only 0.03% of their surface area. Diatoms frequently dominate coastal sediments, where they experience large variations in light regime resulting from the interplay of diurnal and tidal cycles. Here, we report on an extensive diurnal transcript profiling experiment of the motile benthic diatom Seminavis robusta. Nearly 90% (23,328) of expressed protein-coding genes and 66.9% (1124) of expressed long intergenic non-coding RNAs (lincRNAs) showed significant expression oscillations and are predominantly phasing at night with a periodicity of 24h. Phylostratigraphic analysis found that rhythmic genes are enriched in deeply conserved genes, while diatom-specific genes are predominantly associated with midnight expression. Integration of genetic and physiological cell cycle markers with silica depletion data revealed potential new silica cell wall associated gene families specific to diatoms. Additionally, we observed 1752 genes with a remarkable semidiurnal (12-h) periodicity, while the expansion of putative circadian transcription factors may reflect adaptations to cope with highly unpredictable external conditions. Taken together, our results provide new insights into the adaptations of diatoms to the benthic environment and serve as a valuable resource for diurnal regulation in photosynthetic eukaryotes.

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Decision-making of the benthic diatom Seminavis robusta searching for inorganic nutrients and pheromones

Cited by 21 publications

References 39 publications

Substratum‐associated microbiota

Substratum‐associated microbiota

Pheromone Mediated Sexual Reproduction of Pennate Diatom Cylindrotheca Closterium

Diurnal transcript profiling of the diatomSeminavis robustareveals adaptations to a benthic lifestyle

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