skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Establishment of stable synthetic mutualism without co-evolution between microalgae and bacteria demonstrated by mutual transfer of metabolites (NanoSIMS isotopic imaging) and persistent physical association (Fluorescent in situ hybridization)

Journal Article · · Algal Research
 [1];  [2];  [3];  [2];  [4]; ORCiD logo [5];  [6];  [1]
  1. The Bashan Institute of Science, Auburn, AL (United States); Auburn Univ., AL (United States); Environmental Microbiology Group, Northwestern center for Biological Research, La Paz (Mexico)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. NASA Ames Research Center (ARC), Moffett Field, Mountain View, CA (United States)
  4. NASA Ames Research Center (ARC), Moffett Field, Mountain View, CA (United States); Bay Area Environmental Research Inst. Petaluma, CA (United States)
  5. The Bashan Institute of Science, Auburn, AL (United States); Environmental Microbiology Group, Northwestern center for Biological Research, La Paz (Mexico)
  6. The Bashan Institute of Science, Auburn, AL (United States)

The demonstration of a mutualistic interaction requires evidence of benefits for both partners as well as stability of the association over multiple generations. A synthetic mutualism between the freshwater microalga Chlorella sorokiniana and the soil-derived plant growth-promoting bacterium (PGPB) Azospirillum brasilense was created when both microorganisms were co-immobilized in alginate beads. Using stable isotope enrichment experiments followed by high-resolution secondary ion mass spectrometry (SIMS) imaging of single cells, we demonstrated transfer of carbon and nitrogen compounds between the two partners. Further, using fluorescent in situ hybridization (FISH), mechanical disruption and scanning electron microscopy, we demonstrated the stability of their physical association for a period of 10 days after the aggregated cells were released from the beads. The bacteria significantly enhanced the growth of the microalgae while the microalgae supported growth of the bacteria in a medium where it could not otherwise grow. In conclusion, we propose that this microalga-bacterium association is a true synthetic mutualism independent of co-evolution. (155 words).

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC52-07NA27344; SCW1039
OSTI ID:
1241994
Alternate ID(s):
OSTI ID: 1356676
Report Number(s):
LLNL-JRNL-675179
Journal Information:
Algal Research, Vol. 15, Issue C; ISSN 2211-9264
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 47 works
Citation information provided by
Web of Science

References (58)

Azospirillum -plant relationships: physiological, molecular, agricultural, and environmental advances (1997-2003) journal August 2004
Chlorella sorokiniana (formerly C. vulgaris) UTEX 2714, a non-thermotolerant microalga useful for biotechnological applications and as a reference strain journal April 2015
Development of two culture media for mass cultivation of Azospirillum spp. and for production of inoculants to enhance plant growth journal April 2011
Engineering microbial consortia: a new frontier in synthetic biology journal September 2008
Speciation by symbiosis journal August 2012
Enhanced accumulation of starch and total carbohydrates in alginate-immobilized Chlorella spp. induced by Azospirillum brasilense: I. Autotrophic conditions journal October 2012
Enhanced accumulation of starch and total carbohydrates in alginate-immobilized Chlorella spp. induced by Azospirillum brasilense: II. Heterotrophic conditions journal October 2012
Enhanced activity of ADP glucose pyrophosphorylase and formation of starch induced by Azospirillum brasilense in Chlorella vulgaris journal May 2014
Applicability of the fluorescein diacetate method of detecting active bacteria in freshwater journal June 1984
The Domain-specific Probe EUB338 is Insufficient for the Detection of all Bacteria: Development and Evaluation of a more Comprehensive Probe Set journal September 1999
Joint Immobilization of Plant Growth-Promoting Bacteria and Green Microalgae in Alginate Beads as an Experimental Model for Studying Plant-Bacterium Interactions journal September 2008
Immobilized microalgae for removing pollutants: Review of practical aspects journal March 2010
Cultivation factors and population size control the uptake of nitrogen by the microalgae Chlorella vulgaris when interacting with the microalgae growth-promoting bacterium Azospirillum brasilense journal October 2005
Increased pigment and lipid content, lipid variety, and cell and population size of the microalgae Chlorella spp. when co-immobilized in alginate beads with the microalgae-growth-promoting bacterium Azospirillum brasilense journal June 2002
Microalgae growth-promoting bacteria as “helpers” for microalgae: a novel approach for removing ammonium and phosphorus from municipal wastewater journal January 2004
Removal of ammonium and phosphorus ions from synthetic wastewater by the microalgae Chlorella vulgaris coimmobilized in alginate beads with the microalgae growth-promoting bacterium Azospirillum brasilense journal July 2002
Cell-Cell Interaction in the Eukaryote-Prokaryote Model of the Microalgae Chlorella Vulgaris and the Bacterium Azospirillum Brasilense Immobilized in Polymer Beads1: Cell-Cell Interaction Between Eukaryote and Prokaryote journal September 2011
INVOLVEMENT OF INDOLE-3-ACETIC ACID PRODUCED BY THE GROWTH-PROMOTING BACTERIUM AZOSPIRILLUM SPP . IN PROMOTING GROWTH OF CHLORELLA VULGARIS 1 journal August 2008
ROLE OF GLUTAMATE DEHYDROGENASE AND GLUTAMINE SYNTHETASE IN CHLORELLA VULGARIS DURING ASSIMILATION OF AMMONIUM WHEN JOINTLY IMMOBILIZED WITH THE MICROALGAE-GROWTH-PROMOTING BACTERIUM AZOSPIRILLUM BRASILENSE 1 journal October 2008
High lipid productivity of an Ankistrodesmus – Rhizobium artificial consortium journal October 2013
Synthetic ecology: A model system for cooperation journal January 2007
Efficiency of ammonia and phosphorus removal from a colombian agroindustrial wastewater by the microalgae Chlorella vulgaris and Scenedesmus dimorphus journal June 1997
Increased Growth of the Microalga Chlorella vulgariswhen Coimmobilized and Cocultured in Alginate Beads with the Plant-Growth-Promoting Bacterium Azospirillum brasilense journal April 2000
Changes in the metabolism of the microalga Chlorella vulgaris when coimmobilized in alginate with the nitrogen-fixing Phyllobacterium myrsinacearum journal July 2000
Environmental proteomics, biodiversity statistics and food-web structure journal August 2012
Intracellular and extracellular PGPR: commonalities and distinctions in the plant–bacterium signaling processes journal March 2005
Synthetic microbial communities journal April 2014
The interactions between Chlorella vulgaris and algal symbiotic bacteria under photoautotrophic and photoheterotrophic conditions journal October 2013
A simple separation technique for purifying micro-algae journal June 1977
Growth promotion of the freshwater microalga Chlorella vulgaris by the nitrogen-fixing, plant growth-promoting bacterium Bacillus pumilus from arid zone soils journal January 2009
Niche engineering demonstrates a latent capacity for fungal-algal mutualism journal July 2014
Construction of an artificial symbiotic community using a Chlorella–symbiont association as a model: Construction of symbiotic association of microorganisms journal March 2008
Design of synthetic microbial communities for biotechnological production processes journal August 2014
Role of Rhizobium, a plant growth promoting bacterium, in enhancing algal biomass through mutualistic interaction journal October 2014
Construction of bacteria–eukaryote synthetic mutualism journal August 2013
Screening and selection of growth-promoting bacteria for Dunaliella cultures journal July 2013
Accumulation fatty acids of in Chlorella vulgaris under heterotrophic conditions in relation to activity of acetyl-CoA carboxylase, temperature, and co-immobilization with Azospirillum brasilense journal August 2014
Artificial tripartite symbiosis involving a green alga (Chlamydomonas), a bacterium (Azotobacter) and a fungus (Alternaria): Morphological and physiological characterization journal July 2010
Involvement of indole-3-acetic acid produced by Azospirillum brasilense in accumulating intracellular ammonium in Chlorella vulgaris journal February 2015
Accumulation of intra-cellular polyphosphate in Chlorella vulgaris cells is related to indole-3-acetic acid produced by Azospirillum brasilense journal June 2015
Using artificial systems to explore the ecology and evolution of symbioses journal March 2011
Metabolic engineering of ammonium release for nitrogen-fixing multispecies microbial cell-factories journal May 2014
Genetic engineering of multispecies microbial cell factories as an alternative for bioenergy production journal September 2013
Enhancement of thiamine release during synthetic mutualism between Chlorella sorokiniana and Azospirillum brasilense growing under stress conditions journal August 2015
Synthetic microbial ecosystems for biotechnology journal February 2014
Algal endosymbiosis in brown hydra: host/symbiont specificity journal December 1986
Growth and phosphorus removal by Synechococcus elongatus co-immobilized in alginate beads with Azospirillum brasilense journal October 2015
The Evolution of Cooperation journal June 2004
Indole-3-acetic acid in microbial and microorganism-plant signaling journal July 2007
Microalgal symbiosis in biotechnology journal May 2014
Evidence for a plant-associated natural habitat for Cronobacter spp. journal October 2009
Synthetic cooperation in engineered yeast populations journal January 2007
Design and Application of New 16S rRNA-targeted Oligonucleotide Probes for the Azospirillum-Skermanella-Rhodocista-Cluster journal January 2001
An experimental test of the symbiosis specificity between the ciliate Paramecium bursaria and strains of the unicellular green alga Chlorella journal August 2007
Symbiotic association in Chlorella culture journal January 2005
Endosymbiosis: Lessons in Conflict Resolution journal March 2004
Emergent cooperation in microbial metabolism journal January 2010
Developing symbiotic consortia for lignocellulosic biofuel production journal January 2012

Cited By (14)

Azospirillum brasilense Increases CO2 Fixation on Microalgae Scenedesmus obliquus, Chlorella vulgaris, and Chlamydomonas reinhardtii Cultured on High CO2 Concentrations journal January 2018
Early Changes in Nutritional Conditions Affect Formation of Synthetic Mutualism Between Chlorella sorokiniana and the Bacterium Azospirillum brasilense journal November 2018
Azospirillum brasilense-microalga interaction increases growth and accumulation of cell compounds in Chlorella vulgaris and Tetradesmus obliquus cultured under nitrogen stress journal July 2019
Enhanced performance of the microalga Chlorella sorokiniana remotely induced by the plant growth-promoting bacteria Azospirillum brasilense and Bacillus pumilus journal February 2017
Emerging microalgae technology: a review journal January 2018
Advances in the technologies for studying consortia of bacteria and cyanobacteria/microalgae in wastewaters journal April 2019
Pelagibaca bermudensis promotes biofuel competence of Tetraselmis striata in a broad range of abiotic stressors: dynamics of quorum-sensing precursors and strategic improvement in lipid productivity journal April 2018
Azospirillum brasilense promotes increases in growth and nitrogen use efficiency of maize genotypes journal April 2019
Maize Inoculation with Azospirillum brasilense Ab-V5 Cells Enriched with Exopolysaccharides and Polyhydroxybutyrate Results in High Productivity under Low N Fertilizer Input journal September 2017
Symbiotic Co-Culture of Scenedesmus sp. and Azospirillum brasilense on N-Deficient Media with Biomass Production for Biofuels journal January 2019
Combining SIMS and mechanistic modelling to reveal nutrient kinetics in an algal-bacterial mutualism text January 2021
Combining SIMS and mechanistic modelling to reveal nutrient kinetics in an algal-bacterial mutualism. text January 2021
Combining SIMS and mechanistic modelling to reveal nutrient kinetics in an algal-bacterial mutualism. text January 2021
Correction to: Pelagibaca bermudensis promotes biofuel competence of Tetraselmis striata in a broad range of abiotic stressors: dynamics of quorum-sensing precursors and strategic improvement in lipid productivity journal July 2018