Dynamic metabolic exchange governs a marine algal-bacterial interaction

Segev, Einat; Wyche, Thomas P.; Kim, Ki Hyun; Petersen, Jörn; Ellebrandt, Claire; Vlamakis, Hera; Barteneva, Natasha S.; Paulson, Joseph N.; Chai, Liraz; Clardy, Jon; Kolter, Roberto

doi:10.7554/elife.17473

Cited by 206 publications

(337 citation statements)

References 83 publications

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“…For example, various algae are known to depend on vitamin B 12 provided by bacteria in their environment [1]. Another famous example is the “regulation” of algal blooms of the haptophyte Emiliania huxleyi by bacteria [2]. Interactions with microbes – both positive and negative – are thus part of every photosynthetic eukaryote’s life.…”

Section: Introductionmentioning

confidence: 99%

On plant defense signaling networks and early land plant evolution

Vries

Dahlen

Gould

et al. 2018

Communicative & Integrative Biology

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All land plants must cope with phytopathogens. Algae face pathogens, too, and it is reasonable to assume that some of the strategies for dealing with pathogens evolved prior to the origin of embryophytes – plant terrestrialization simply changed the nature of the plant-pathogen interactions. Here we highlight that many potential components of the angiosperm defense toolkit are i) found in streptophyte algae and non-flowering embryophytes and ii) might be used in non-flowering plant defense as inferred from published experimental data. Nonetheless, the common signaling networks governing these defense responses appear to have become more intricate during embryophyte evolution. This includes the evolution of the antagonistic signaling pathways of jasmonic and salicylic acid, multiple independent expansions of resistance genes, and the evolution of resistance gene-regulating microRNAs. Future comparative studies will illuminate which modules of the streptophyte defense signaling network constitute the core and which constitute lineage- and/or environment-specific (peripheral) signaling circuits.

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Section: Introductionmentioning

confidence: 99%

On plant defense signaling networks and early land plant evolution

Vries

Dahlen

Gould

et al. 2018

Communicative & Integrative Biology

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“…Specifically, the bacteria provide essential molecules (e.g., B vitamins and growth promoting factors) and antibiotics effective against algal pathogens in return for algal fixed carbon exudates (primarily dimethylsulfoniopropionate and Krebs cycle intermediates; Wagner‐Döbler et al., ; Seyedsayamdost, Case, Kolter, & Clardy, ; Wang et al., , ; Amin et al., ; Cruz‐López & Maske, ; Segev et al., ; Wang, Gallant, & Seyedsayamdost, ). Furthermore, bacterial phylotypes belonging to Rhodobacteraceae have been found to switch from mutualists to pathogens of their dinoflagellate hosts in response to either photosynthetic products or algal senescence signaling molecules (Riclea et al., ; Segev et al., ; Seyedsayamdost et al., ; Sule & Belas, ; Wang et al., , , ). These findings imply a possible relevance of this bimodal interaction in algal bloom initiation and termination (Riclea et al., ; Wang et al., ), especially once the dominance of the same phylotypes is assessed in the bacterial communities associated with both bloom phases.…”

Section: Introductionmentioning

confidence: 99%

Microbial dynamics during harmful dinoflagellate Ostreopsis cf. ovata growth: Bacterial succession and viral abundance pattern

2018

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Algal–bacterial interactions play a major role in shaping diversity of algal associated bacterial communities. Temporal variation in bacterial phylogenetic composition reflects changes of these complex interactions which occur during the algal growth cycle as well as throughout the lifetime of algal blooms. Viruses are also known to cause shifts in bacterial community diversity which could affect algal bloom phases. This study investigated on changes of bacterial and viral abundances, bacterial physiological status, and on bacterial successional pattern associated with the harmful benthic dinoflagellate Ostreopsis cf. ovata in batch cultures over the algal growth cycle. Bacterial community phylogenetic structure was assessed by 16S rRNA gene ION torrent sequencing. A comparison between bacterial community retrieved in cultures and that one co‐occurring in situ during the development of the O. cf. ovata bloom from where the algal strain was isolated was also reported. Bacterial community growth was characterized by a biphasic pattern with the highest contributions (~60%) of highly active bacteria found at the two bacterial exponential growth steps. An alphaproteobacterial consortium composed by the Rhodobacteraceae Dinoroseobacter (22.2%–35.4%) and Roseovarius (5.7%–18.3%), together with Oceanicaulis (14.2‐40.3%), was strongly associated with O. cf. ovata over the algal growth. The Rhodobacteraceae members encompassed phylotypes with an assessed mutualistic‐pathogenic bimodal behavior. Fabibacter (0.7%–25.2%), Labrenzia (5.6%–24.3%), and Dietzia (0.04%–1.7%) were relevant at the stationary phase. Overall, the successional pattern and the metabolic and functional traits of the bacterial community retrieved in culture mirror those ones underpinning O. cf. ovata bloom dynamics in field. Viral abundances increased synoptically with bacterial abundances during the first bacterial exponential growth step while being stationary during the second step. Microbial trends also suggest that viruses induced some shifts in bacterial community composition.

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“…As also tried in the current study, COR is often measured as reduction of growth rates in the resistant host [23,24,25,26,27], but other CORs, like altered susceptibility to other viruses and possibly also to some bacteria [85], have also been argued [29,84,86,87,88]. Trade-off might also emerge when strains with different resistance capacities are put under competition for a limited level of nutrients [30,33,89,90], and this is the logical follow up to our study.…”

Section: Discussionmentioning

confidence: 99%

Emerging Interaction Patterns in the Emiliania huxleyi-EhV System

Ruiz

Oosterhof

Sandaa

et al. 2017

Viruses

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Viruses are thought to be fundamental in driving microbial diversity in the oceanic planktonic realm. That role and associated emerging infection patterns remain particularly elusive for eukaryotic phytoplankton and their viruses. Here we used a vast number of strains from the model system Emiliania huxleyi/Emiliania huxleyi Virus to quantify parameters such as growth rate (µ), resistance (R), and viral production (Vp) capacities. Algal and viral abundances were monitored by flow cytometry during 72-h incubation experiments. The results pointed out higher viral production capacity in generalist EhV strains, and the virus-host infection network showed a strong co-evolution pattern between E. huxleyi and EhV populations. The existence of a trade-off between resistance and growth capacities was not confirmed.

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Dynamic metabolic exchange governs a marine algal-bacterial interaction

Cited by 206 publications

References 83 publications

On plant defense signaling networks and early land plant evolution

On plant defense signaling networks and early land plant evolution

Microbial dynamics during harmful dinoflagellate Ostreopsis cf. ovata growth: Bacterial succession and viral abundance pattern

Emerging Interaction Patterns in the Emiliania huxleyi-EhV System

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