Rosanna C. Hennessy

University of Copenhagen

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Peter Stougaard

Aarhus University

Mette Haubjerg Nicolaisen

University of Copenhagen

Frederik Bak

University of Copenhagen

Tue Kjærgaard Nielsen

University of Copenhagen

Stefan Olsson

Fujian Agriculture and Forestry University

Lars Hestbjerg Hansen

University of Copenhagen

Ying Guan

China Tobacco

Alexander Byth Carstens

University of Copenhagen

Katrine Wacenius Skov Alanin

University of Copenhagen

Courtney Horn Herms

University of Copenhagen

Cooperative Institutions

University of Copenhagen

Aarhus University

Technical University of Denmark

Fujian Agriculture and Forestry University

Planta

Royal Agricultural University

Ecologie Microbienne Lyon

Roskilde University

University of York

Geological Survey of Denmark and Greenland

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Back to our roots: exploring the role of root morphology as a mediator of beneficial plant–microbe interactions

Environmental Microbiology (2022)

Courtney Horn Herms Rosanna C. Hennessy Frederik Bak Dorte Bodin Dresbøll Mette Haubjerg Nicolaisen

Summary Plant breeding for belowground traits that have a positive impact on the rhizosphere microbiome is a promising strategy to sustainably improve crop yields. Root architecture and morphology are understudied plant breeding targets despite their potential to significantly shape microbial community structure and function in the rhizosphere. In this review, we explore the relationship between various root architectural and morphological traits and rhizosphere interactions, focusing on the potential of root diameter to impact the rhizosphere microbiome structure and function while discussing the potential biological and ecological mechanisms underpinning this process. In addition, we propose three future research avenues to drive this research area in an effort to unravel the effect of belowground traits on rhizosphere microbiology. This knowledge will pave the way for new plant breeding strategies that can be exploited for sustainable and high‐yielding crop cultivars.

Root (linguistics)

10.1111/1462-2920.15926

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Citations (93)

Complete Genome Sequence of the Cytokinin-Producing Biocontrol Strain Pseudomonas fluorescens G20-18

Microbiology Resource Announcements (2021)

Tue Kjærgaard Nielsen Mengistu F. Mekureyaw Lars Hestbjerg Hansen Mette Haubjerg Nicolaisen Thomas Roitsch

Here, we report the complete genome sequence of the cytokinin-producing plant growth-promoting strain Pseudomonas fluorescens G20-18. The complete genome assembly resulted in a single, circular chromosome of 6.48 Mbp and harbors several secondary metabolite biosynthesis gene clusters that are potentially involved in its plant growth-promoting function.

Pseudomonas fluorescens

Strain (injury)

Secondary metabolite

10.1128/mra.00601-21

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Citations (3)

Interaction of the psychrotroph Pseudomonas fluorescens In5 with phytopathogens in cold soils

Rosanna C. Hennessy Stefan Olsson Peter Stougaard

Pseudomonas fluorescens

Source

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Citations (0)

Complete Genome Sequence of Paenibacillus sp. Strain 37, a Plant Growth-Promoting Bacterium Isolated from the Rhizosphere of Abies nordmanniana (Nordmann Fir)

Microbiology Resource Announcements (2021)

Adriana M. García-Lemos Rosanna C. Hennessy Tue Kjærgaard Nielsen Lars Hestbjerg Hansen Mette Haubjerg Nicolaisen

We report the complete genome sequence of Paenibacillus sp. strain 37, a plant growth-promoting bacterium (PGPB) isolated from the rhizosphere of Abies nordmanniana (Stev.) Spach; it contains a single chromosome of 7.08 Mbp and one plasmid of 54.33 kbp, including 6,445 protein-coding genes, 107 tRNAs, and 13 rRNA loci.

Paenibacillus

Strain (injury)

10.1128/mra.01139-19

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The cytokinin-producing plant beneficial bacterium Pseudomonas fluorescens G20-18 primes tomato (Solanum lycopersicum) for enhanced drought stress responses

Journal of Plant Physiology (2022)

Mengistu F. Mekureyaw Chandana Pandey Rosanna C. Hennessy Mette Haubjerg Nicolaisen Fulai Liu

Pseudomonas fluorescens

Drought Tolerance

Plant Physiology

10.1016/j.jplph.2022.153629

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Citations (62)

Four novel Curtobacterium phages isolated from environmental samples

Archives of Virology (2023)

Katrine Wacenius Skov Alanin Nikoline S. Olsen Amaru Miranda Djurhuus Alexander Byth Carstens Tue Kjærgaard Nielsen

Phyllosphere

10.1007/s00705-023-05706-9

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Citations (1)

Diversity and Structure of Bacterial Communities in Different Rhizocompartments (Rhizoplane, Rhizosphere, and Bulk) at Flag Leaf Emergence in Four Winter Wheat Varieties

Microbiology Resource Announcements (2022)

Athanasios Zervas Lea Ellegaard‐Jensen Rosanna C. Hennessy Frederik Bak Ying Guan

Understanding basic interactions at the plant-soil interphase is critical if we are to exploit natural microbial communities for improved crop resilience. We report here 16S amplicon sequencing data from 3 rhizocompartments of 4 wheat cultivars grown under controlled greenhouse conditions. We observed that rhizocompartments and cultivar affect the community composition.

Flag (linear algebra)

Amplicon sequencing

10.1128/mra.00222-22

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Generating Phenotypic Diversity in a Fungal Biocatalyst to Investigate Alcohol Stress Tolerance Encountered during Microbial Cellulosic Biofuel Production

PLoS ONE (2013)

Rosanna C. Hennessy Fiona M. Doohan Ewen Mullins

Consolidated bioprocessing (CBP) of lignocellulosic biomass offers an alternative route to renewable energy. The crop pathogen Fusarium oxysporum is a promising fungal biocatalyst because of its broad host range and innate ability to co-saccharify and ferment lignocellulose to bioethanol. A major challenge for cellulolytic CBP-enabling microbes is alcohol inhibition. This research tested the hypothesis that Agrobacterium tumefaciens - mediated transformation (ATMT) could be exploited as a tool to generate phenotypic diversity in F. oxysporum to investigate alcohol stress tolerance encountered during CBP. A random mutagenesis library of gene disruption transformants (n=1,563) was constructed and screened for alcohol tolerance in order to isolate alcohol sensitive or tolerant phenotypes. Following three rounds of screening, exposure of select transformants to 6% ethanol and 0.75% n-butanol resulted respectively in increased (≥11.74%) and decreased (≤43.01%) growth compared to the wild –type (WT). Principal component analysis (PCA) quantified the level of phenotypic diversity across the population of genetically transformed individuals and isolated candidate strains for analysis. Characterisation of one strain, Tr. 259, ascertained a reduced growth phenotype under alcohol stress relative to WT and indicated the disruption of a coding region homologous to a putative sugar transporter (FOXG_09625). Quantitative PCR (RT-PCR) showed FOXG_09625 was differentially expressed in Tr. 259 compared to WT during alcohol-induced stress (P<0.05). Phylogenetic analysis of putative sugar transporters suggests diverse functional roles in F. oxysporum and other filamentous fungi compared to yeast for which sugar transporters form part of a relatively conserved family. This study has confirmed the potential of ATMT coupled with a phenotypic screening program to select for genetic variation induced in response to alcohol stress. This research represents a first step in the investigation of alcohol tolerance in F. oxysporum and has resulted in the identification of several novel strains, which will be of benefit to future biofuel research.

Cellulosic ethanol

10.1371/journal.pone.0077501

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Citations (9)

Three novel Erwinia billingiae phages isolated from organic waste represent three new genera

Archives of Virology (2023)

Katrine Wacenius Skov Alanin Nikoline S. Olsen Amaru Miranda Djurhuus Alexander Byth Carstens Tue Kjærgaard Nielsen

Subfamily

10.1007/s00705-023-05700-1

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Citations (2)

Draft Genome Sequence of a Novel Serratia sp. Strain with Antifungal Activity

Microbiology Resource Announcements (2018)

Søs I. Dichmann Byeonghyeok Park Duleepa Pathiraja In‐Geol Choi Peter Stougaard

This report describes the draft genome sequence of Serratia sp. strain S40, isolated from potato; it contains 5,383,735 bp and a G+C content of 55.9% and harbors 4,875 predicted coding sequences across 29 contigs. The genomic data provide insight into the genetics underpinning the antifungal activity of this strain.

Serratia

Strain (injury)

10.1128/mra.01340-18

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Citations (3)