Evidence map›Paper›PMID 29554291›Full record

ArticleMolecular biology and evolution2018

Genomic Changes Associated with the Evolutionary Transitions of Nostoc to a Plant Symbiont.

Denis Warshan, Anton Liaimer, Eric Pederson, Sea-Yong Kim, Nicole Shapiro, Tanja Woyke, Bjørn Altermark, Katharina Pawlowski, Philip D Weyman, Christopher L Dupont and 1 more

Open access · bronzeAbstract read
In one paragraph

Article in Molecular biology and evolution, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed, 1 pooled it
11.2field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

32 citing papers in PubMed, 1 synthesis or guideline pooled it, 76 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors at 4 institutions in 3 countries.

Denis WarshanDepartment of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
Anton LiaimerDepartment of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics, UiT-The Arctic University of Norway, Tromsø, Norway.
Eric PedersonDepartment of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
Sea-Yong KimDepartment of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
Nicole ShapiroUS Department of Energy Joint Genome Institute, Walnut Creek, CA.
Tanja WoykeUS Department of Energy Joint Genome Institute, Walnut Creek, CA.
Bjørn AltermarkDepartment of Chemistry, Faculty of Science and Technology, UiT-The Arctic University of Norway, Tromsø, Norway.
Katharina PawlowskiDepartment of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
Philip D WeymanDepartment of Synthetic Biology and Bioenergy, J. Craig Venter Institute, La Jolla, CA.
Christopher L DupontDepartment of Microbial and Environmental Genomics, J. Craig Venter Institute, La Jolla, CA.
Ulla RasmussenDepartment of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
Stockholm University · SEJ. Craig Venter Institute · USJoint Genome Institute · USUiT The Arctic University of Norway · NO

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Cyanobacteria belonging to the genus Nostoc comprise free-living strains and also facultative plant symbionts. Symbiotic strains can enter into symbiosis with taxonomically diverse range of host plants. Little is known about genomic changes associated with evolutionary transition of Nostoc from free-living to plant symbiont. Here, we compared the genomes derived from 11 symbiotic Nostoc strains isolated from different host plants and infer phylogenetic relationships between strains. Phylogenetic reconstructions of 89 Nostocales showed that symbiotic Nostoc strains with a broad host range, entering epiphytic and intracellular or extracellular endophytic interactions, form a monophyletic clade indicating a common evolutionary history. A polyphyletic origin was found for Nostoc strains which enter only extracellular symbioses, and inference of transfer events implied that this trait was likely acquired several times in the evolution of the Nostocales. Symbiotic Nostoc strains showed enriched functions in transport and metabolism of organic sulfur, chemotaxis and motility, as well as the uptake of phosphate, branched-chain amino acids, and ammonium. The genomes of the intracellular clade differ from that of other Nostoc strains, with a gain/enrichment of genes encoding proteins to generate l-methionine from sulfite and pathways for the degradation of the plant metabolites vanillin and vanillate, and of the macromolecule xylan present in plant cell walls. These compounds could function as C-sources for members of the intracellular clade. Molecular clock analysis indicated that the intracellular clade emerged ca. 600 Ma, suggesting that intracellular Nostoc symbioses predate the origin of land plants and the emergence of their extant hosts.

Indexed as

Biological EvolutionGenome, BacterialAmino Acid SequenceBenzaldehydesBryophytaChemotaxisEndophytesGene Transfer, HorizontalMagnoliopsidaNostocPhototaxisPolysaccharidesSelection, GeneticSulfurSymbiosisBenzaldehydeshemicellulosePolysaccharidesSulfurvanillin

Identifiers

PMID29554291
PMCPMC5913679
OpenAlexW2792957513

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.