Title: Conservation of beneficial microbes between the rhizosphere and the cyanosphere

Journal Article · · New Phytologist
DOI: https://doi.org/10.1111/nph.19225 · OSTI ID:1998204

Summary Biocrusts are phototroph‐driven communities inhabiting arid soil surfaces. Like plants, most photoautotrophs (largely cyanobacteria) in biocrusts are thought to exchange fixed carbon for essential nutrients like nitrogen with cyanosphere bacteria. Here, we aim to compare beneficial interactions in rhizosphere and cyanosphere environments, including finding growth‐promoting strains for hosts from both environments. To examine this, we performed a retrospective analysis of 16S rRNA gene sequencing datasets, host–microbe co‐culture experiments between biocrust communities/biocrust isolates and a model grass ( Brachypodium distachyon ) or a dominant biocrust cyanobacterium ( Microcoleus vaginatus ), and metabolomic analysis. All 18 microbial phyla in the cyanosphere were also present in the rhizosphere, with additional 17 phyla uniquely found in the rhizosphere. The biocrust microbes promoted the growth of the model grass, and three biocrust isolates ( Bosea sp._L1B56, Pseudarthrobacter sp. _ L1D14 and Pseudarthrobacter picheli_ L1D33) significantly promoted the growth of both hosts. Moreover, pantothenic acid was produced by Pseudarthrobacter sp._L1D14 when grown on B . distachyon exudates, and supplementation of plant growth medium with this metabolite increased B . distachyon biomass by over 60%. These findings suggest that cyanobacteria and other diverse photoautotrophic hosts can be a source for new plant growth‐promoting microbes and metabolites.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Montana State University, Bozeman, MT (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-05CH11231; SC0021369
OSTI ID:
1998204
Journal Information:
New Phytologist, Journal Name: New Phytologist Journal Issue: 3 Vol. 240; ISSN 0028-646X
Publisher:
Wiley-BlackwellCopyright Statement
Country of Publication:
United Kingdom
Language:
English

References (64)

Biocrusts positively affect the soil water balance in semiarid ecosystems: The Role of Biocrusts in the Local Water Balance journal January 2016
The potential roles of biological soil crusts in dryland hydrologic cycles journal January 2006
Biological Soil Crusts as an Organizing Principle in Drylands book January 2016
High-efficiency Agrobacterium-mediated transformation of Brachypodium distachyon inbred line Bd21-3 journal November 2007
Production of B-group vitamins by plant growth-promoting Pseudomonas fluorescens strain 267 and the importance of vitamins in the colonization and nodulation of red clover journal February 2001
Nitrogen cycling in desert biological soil crusts across biogeographic regions in the Southwestern United States journal March 2011
The concurrent use of novel soil surface microclimate measurements to evaluate CO2 pulses in biocrusted interspaces in a cool desert ecosystem journal September 2017
Plant species-specificity and effects of bioinoculants and fertilization on plant performance for nickel phytomining journal February 2018
Consistent Sets of Spectrophotometric Chlorophyll Equations for Acetone, Methanol and Ethanol Solvents journal June 2006
Optimization of Fermentation Medium for Indole Acetic Acid Production by Pseudarthrobacter sp. NIBRBAC000502770 journal March 2021
Microbiota and Host Nutrition across Plant and Animal Kingdoms journal May 2015
Dealing with the unknown: Metabolomics and Metabolite Atlases journal September 2010
Soil inoculation method determines the strength of plant–soil interactions journal December 2012
Biological soil crusts greatly contribute to small-scale soil heterogeneity along a grazing gradient journal September 2013
Growth explains microbial carbon use efficiency across soils differing in land use and geology journal January 2019
Let the Core Microbiota Be Functional journal July 2017
Feed Your Friends: Do Plant Exudates Shape the Root Microbiome? journal January 2018
“Pantothenic Acid,” A Growth Determinant of Universal Biological Occurrence journal July 1933
Physiological variation among native and exotic winter annual plants associated with microbiotic crusts in the Mojave Desert journal July 2001
Exogenous glucosinolate produced by Arabidopsis thaliana has an impact on microbes in the rhizosphere and plant roots journal June 2009
Ultra-high-throughput microbial community analysis on the Illumina HiSeq and MiSeq platforms journal March 2012
Drought and host selection influence bacterial community dynamics in the grass root microbiome journal July 2017
Defining the core Arabidopsis thaliana root microbiome journal August 2012
Exometabolite niche partitioning among sympatric soil bacteria journal September 2015
Contribution of cryptogamic covers to the global cycles of carbon and nitrogen journal June 2012
DADA2: High-resolution sample inference from Illumina amplicon data journal May 2016
A symbiotic nutrient exchange within the cyanosphere microbiome of the biocrust cyanobacterium, Microcoleus vaginatus journal September 2020
Evolutionary conservation of a core root microbiome across plant phyla along a tropical soil chronosequence journal August 2017
Linking soil biology and chemistry in biological soil crust using isolate exometabolomics journal January 2018
Root exudate metabolites drive plant-soil feedbacks on growth and defense by shaping the rhizosphere microbiota journal July 2018
The structure and function of the global citrus rhizosphere microbiome journal November 2018
Shared features and reciprocal complementation of the Chlamydomonas and Arabidopsis microbiota journal January 2022
Rhizosphere bacteriome structure and functions journal February 2022
Dryland photoautotrophic soil surface communities endangered by global change journal February 2018
Dynamic root exudate chemistry and microbial substrate preferences drive patterns in rhizosphere microbial community assembly journal March 2018
Genomic insights that advance the species definition for prokaryotes journal February 2005
Assembly and ecological function of the root microbiome across angiosperm plant species journal January 2018
Ecological drivers of bacterial community assembly in synthetic phycospheres journal February 2020
Panothenic Acid and the Nodule Bacteria-Legume Symbiosis journal June 1935
Multilocus sequence analysis of Bosea species and description of Bosea lupini sp. nov., Bosea lathyri sp. nov. and Bosea robiniae sp. nov., isolated from legumes journal October 2012
Pantothenic acid as a Nutrilite for Green Plants journal July 1935
Root Exudation and Rhizosphere Biology: Fig. 1. journal May 2003
Mutually Exclusive Alterations in Secondary Metabolism Are Critical for the Uptake of Insoluble Iron Compounds by Arabidopsis and Medicago truncatula journal June 2013
Towards a predictive framework for biocrust mediation of plant performance: A meta‐analysis journal May 2019
Evolution of bacterial communities in the wheat crop rhizosphere: Rhizosphere bacteria in field-grown intensive wheat crops journal May 2014
Field study reveals core plant microbiota and relative importance of their drivers: Core microbiota of field-grown sugarcane and their drivers journal January 2018
Controlling the False Discovery Rate: A Practical and Powerful Approach to Multiple Testing journal January 1995
Plant compartment and biogeography affect microbiome composition in cultivated and native Agave species journal October 2015
Naive Bayesian Classifier for Rapid Assignment of rRNA Sequences into the New Bacterial Taxonomy journal June 2007
Beneficial Cyanosphere Heterotrophs Accelerate Establishment of Cyanobacterial Biocrust journal September 2021
The enhancement of plant growth by free-living bacteria journal February 1995
Spatial segregation of the biological soil crust microbiome around its foundational cyanobacterium, Microcoleus vaginatus, and the formation of a nitrogen-fixing cyanosphere journal April 2019
Maize synthesized benzoxazinoids affect the host associated microbiome journal April 2019
The Evolution of a Capacity to Build Supra-Cellular Ropes Enabled Filamentous Cyanobacteria to Colonize Highly Erodible Substrates journal November 2009
p-Coumaric Acid Influenced Cucumber Rhizosphere Soil Microbial Communities and the Growth of Fusarium oxysporum f.sp. cucumerinum Owen journal October 2012
Microbiome and Exudates of the Root and Rhizosphere of Brachypodium distachyon, a Model for Wheat journal October 2016
Plant growth-promoting bacteria as inoculants in agricultural soils journal November 2015
Effects of Cryptogamic Soil Crust on the Population Dynamics of Arabis fecunda (Brassicaceae) journal July 1992
The Exometabolome of Two Model Strains of the Roseobacter Group: A Marketplace of Microbial Metabolites journal October 2017
Putative Nitrogen-Fixing Bacteria Associated With the Rhizosphere and Root Endosphere of Wheat Plants Grown in an Andisol From Southern Chile journal November 2018
Analysis of Metabolomics Datasets with High-Performance Computing and Metabolite Atlases journal July 2015
Different Secondary Metabolite Profiles of Phylogenetically almost Identical Streptomyces griseus Strains Originating from Geographically Remote Locations journal June 2019
Effects of biological soil crusts on seedling growth and element uptake in five desert plants in Junggar Basin, western China journal November 2011
The role of flavonoids in the establishment of plant roots endosymbioses with arbuscular mycorrhiza fungi, rhizobia and Frankia bacteria journal June 2012