Source: MONTANA STATE UNIVERSITY submitted to NRP
GENETIC CONTROLS AND MECHANISMS FOR THE RECRUITMENT OF CROP MICROBIOMES FOR ENHANCED ECOSYSTEM ADAPTATION
Sponsoring Institution
National Institute of Food and Agriculture
Project Status
ACTIVE
Funding Source
Reporting Frequency
Annual
Accession No.
1023548
Grant No.
2020-67014-32138
Cumulative Award Amt.
$748,330.00
Proposal No.
2019-08222
Multistate No.
(N/A)
Project Start Date
Sep 1, 2020
Project End Date
Aug 31, 2025
Grant Year
2020
Program Code
[A1402]- Agricultural Microbiomes in Plant Systems and Natural Resources
Recipient Organization
MONTANA STATE UNIVERSITY
(N/A)
BOZEMAN,MT 59717
Performing Department
Central Ag Research Center
Non Technical Summary
Plant breeding has led to significant advances in crop yield over the past 100 years. However, these increases are not sufficient to meet future global food demands. As climatic, policy, environmental, and food production uncertainties continue to challenge modern food systems, new approaches are needed to improve food production. While GMOs and newer gene editing technologies might enhance yield improvements, there are negative ecological and social implications associated with these approaches. What is needed are sustainable practices for increasing yields that reduce inputs like fertilizers and pesticides and enhance soil health to minimize environmental impacts. Plant breeders recognize that genetics, environment, and the interaction between genetics and the environment impact crop productivity. In the past, breeders have focused on breeding varieties that perform well across many environments. More recently it has been recognized that varieties that perform exceptionally well in one environment may have a sustainable yield advantage. Just as a ball team can often perform better in their home park, we know a variety can be especially adapted to a specific environment, which we call the home field advantage. While the reasons for home field advantage of a ball team are easy to imagine, a home field advantage of a specific crop variety is not fully understood. The home field advantage of locally adapted strains is partly due to the compatible soil microorganisms associated with the plant roots. However, little is known about how plants attract these beneficial microorganisms or the mechanisms by which these microbes help plants deal with environmental stress such as drought. The purpose of this project is to study the differences in the microorganisms associated with the roots of different barley varieties and assess the adaptation of these varieties to different environments. Ultimately this work will provide a better understanding of the mechanisms involved in recruitment of the barley root microbial community and the interactions that occur to increase plant drought tolerance. This work will lead to more sustainable crop production that is better able to adapt to changing climatic conditions.
Animal Health Component
40%
Research Effort Categories
Basic
60%
Applied
40%
Developmental
(N/A)
Classification

Knowledge Area (KA)Subject of Investigation (SOI)Field of Science (FOS)Percent
2011550107040%
2031550108030%
1020110107030%
Goals / Objectives
The main goal of this project is to gain a better understanding of the genetic controls and mechanisms involved in recruitment of plant microbiomes. This will be accomplished through the following goals:1) Characterize the rhizosphere microbiome associated with diverse barley lines grown under different environments to identify candidate plant genes that lead to differential microbiome recruitment. The primary objectives of this goal are to perform a genome wide association study (GWAS) to identify genetic elements that contribute to local adaptation and to identify differences in the microbial community recruited by different barley genotypes.2) Assess the contribution of host genotype and environment to the structure of the recruited rhizosphere microbiome. The objective of this goal is to assess the contribution of host genotype and environment to the structure of the recruited rhizosphere microbiome and test the hypothesis that the recruited microbiome contributes to the local advantage of a given line.3) Characterize the source of variation in crop genotype and microbiome community that lead to enhanced performance under drought conditions. The first objective of this task is to quantify the stress response of different barley lines and assess the agronomic performance under drought stress conditions. An additional objective is to link drought stress response to the presence/absence of specific rhizosphere associated microorganisms.4) Identify mechanisms of recruitment by measuring co-variation of barley root and rhizosphere transcriptomes. Here we use a systems-based approach to identify correlations in gene expression between barley plants and the associated rhizosphere microbiome to identify networks, functional pathways, and candidate genes that mediate these interactions.
Project Methods
Field studies will be performed to evaluate the S2MET Barley Mapping Population at two different locations to determine differences in agronomic performance and microbiome recruitment among genetically diverse barley lines. The rhizosphere microbiome will be sequenced to evaluate differences in the recruited microbial community structure among different barley genotypes. A genome-wide association study (GWAS) will also be performed to identify indicators of local adaptation. To further test the hypothesis that differential microbiome recruitment will be predictable by host genetic variance and environment, a subset of barley lines will be grown in Hawaii under soil and climatic conditions that are extremely different from the semi-arid regions of the Northern Great Plains where barley is commonly grown. This novel experiment is expected to provide further insight into the genotype and environmental influence on rhizosphere microbiome recruitment.Reciprocal-transplant studies will be performed with a subset of barley lines to identify lines that show a significant home field advantage. The best performing lines will be used for the subsequent drought stress response experiment which will compare the performance of select barley lines under drought. This experiment will also evaluate differences in the recruited microbiome of these barley lines under drought stress. Transcriptome response of barley roots and the associated rhizosphere microbiome will also be measured to identify mechanisms involved in barley microbiome recruitment.In addition to the main objective of identifying mechanisms of recruitment that underlie drought stress, the design of this experiment will also enable multiple additional analyses. We will determine differences in gene expression in the roots of barley cultivars in response to increasing drought stress. Next, we will examine metatranscriptome dynamics with increasing drought stress. An important aspect of this proposal is identifying mechanisms that underlie local adaptation of specific cultivars. The design of this objective enables the discovery of both the plant and rhizosphere functions that contribute to this process.The success of this project will be evaluated based on the following outcomes/products generated by each task:Task 2.1: The outcomes of this task will be a dataset describing the agronomic performance of the S2MET barley population in two different locations along with a rhizosphere microbial community characterization of these lines. An additional outcome of this task is identification of gene loci that may be implicated in local adaptation or rhizosphere microbiome recruitment.Task 2.2: The main outcome of this task will be identification of locally adapted barley varieties that show a significant home field advantage. An additional product will be a 16S dataset identifying differences in the structure of the microbial community associated with locally adapted varieties.Task 2.3: One outcome of this task will be an evaluation of the agronomic performance of different barley varieties under drought stress. An additional product will be a model that decomposes the soil contribution to drought and the variety-rhizosphere interactions.Task 2.4: The outcome of this task will be a gene expression database for barley and the rhizosphere microbiome that maps changes in plant and microbe gene expression to different levels of drought stress. Collectively, the outcomes and products of this effort will provide new insights into mechanisms involved in microbiome recruitment.

Progress 09/01/23 to 08/31/24

Outputs
Target Audience:The target audience for this work is farmers, ranchers, agricultural professionals, and researchers. Efforts focused specifically on small grain farmers throughout the northern Great Plains and agricultural consultants who focus on small grain crops. Efforts to reach this audience include presentations at field days, training events organized by Extension, and meetings hosted by industry groups. Changes/Problems:The challenging labor market delayed hiring of a post-doc to assist with the Greenhouse drought experiments and transcriptomics work. We were successful in recruiting a post-doc who started April, 2024 and the final experiments for the project were successfully performed. What opportunities for training and professional development has the project provided?One Ph.D. student has recieved training in bioinformatics methods for analyzing microbial community data. Co-PI Jennifer Lachowiec has an undergraduate student who was trained in greenhouse experiment set up, data collection, and analysis. This student is also being trained in microbial DNA and RNA extractions. How have the results been disseminated to communities of interest?Results of this work were presented at the Montana Agribusiness Association annual convention, Great Falls, MT, on January 26, 2024 to a diverse group of stakeholders which included producers, consultants, agribusiness professionals, and members of the public. What do you plan to do during the next reporting period to accomplish the goals?Goals 1, 2, and 3: Completed. Goal 4: In the next reporting period, we will complete DNA and RNA extractions and sequencing. Analysis of the resulting genomic and transcriptomic datasets will be performed and we anticipate writing and submitting at least 2 additional papers.

Impacts
What was accomplished under these goals? Goals 1 & 2: Project accomplishments this past year addressed Goals 1 & 2 which are to (1) Characterize the rhizosphere microbiome associated with diverse barley lines and perform a GWAS and (2) Assess the contribution of host genotype and environment to the structure of the recruited rhizosphere microbiome. Results from the rhizosphere microbiome analysis were used to peform a genome-wide association study (GWAS) to identify genetic elements contributing to differences in microbial community composition across different environments. Multiple gene loci have been identified and the results of this work have been submitted for publication. Goal 3: Based on yield and home field advantage scores, a subset of 10 barley lines were selected for a greanhouse reciprocal transplant study where sterile soil from the CARC site were inoculated with microorganisms from Bozeman soil and sterile soils from the Bozeman site were inoculated with CARC soil microorganisms. Agronomic data were collected from the barley lines grown under these conditions and rhizosphere microbiome sequencing was performed. Data analysis has been performed and results submitted for publication. Goals 4: A subset of barley lines that were characterized as drough resistant or drought sensitive were selected for greenhouse drought experiments. Greenhouse drought experiments have been completed and agronomic data collected.

Publications

  • Type: Peer Reviewed Journal Articles Status: Published Year Published: 2024 Citation: Ewing, P. M., M. B. Kantar, E. Killian, J. L. Neyhart, J. D. Sherman, J. L. Williams, J. A. Lachowiec and J. O. Eberly (2023). "Local adaptation and broad performance are synergistic to productivity in modern barley." Crop Science 64(1):192-199.
  • Type: Peer Reviewed Journal Articles Status: Submitted Year Published: 2024 Citation: Jessica L Williams, Erik Z Killian, Anna Halpin-McCormick, Michael Benjamin Kantar, Jamie D Sherman, Patrick M Ewing, Jed O Eberly, Jennifer Lachowiec. Uncovering genetic linkages in the rhizosphere contributing to adaptation. Nature Plants


Progress 09/01/22 to 08/31/23

Outputs
Target Audience:The targetaudience for this work isfarmers, ranchers, agricultural professionals, and researchers. Efforts focused specifically onsmall grain farmers throughout the northern Great Plains and agricultural consultants who focus on small grain crops.Efforts to reach this audience include presentations at field days, training events organized by Extension, and meetings hosted by industry groups. Changes/Problems:Supply chain constraints have delayed completion of DNA sequencing for the second year of the study. Results are expected within the next 2-3 months. The challenging labor market has delayed hiring of a post-doc to assist with the transcriptomics work. We have been successful in recruiting a post-doc who will be starting January, 2024. We anticipate this may neccessitate a request for a one-year no-cost extension to complete these experiments. What opportunities for training and professional development has the project provided?Ph.D. student Killian has recieved training in bioinformatics methods for analyzing microbial community data. Co-PI Jennifer Lachowiec's has an undergraduate student who is receiving training in laboratory techniques for research in plants and microbes through this project. Co-PI Patrick Ewing has two undergraduate students he is mentoring and training as part of this project. How have the results been disseminated to communities of interest?Outreach activities included Co-PDLachowiecpresenting the project at the MSU Northern Agricultural Research Center annual Field Day to around 200 regional farmers, ranchers, agricultural professionals, and researchers. Co-PDEwing presented this work to the USDA-ARS Food Systems Research Unit, The Montana State University Department of Plant Sciences and Plant Pathology, and the South Dakota State University Agronomy, horticulture, and Pland Sciences Department. What do you plan to do during the next reporting period to accomplish the goals?Goal 4: Greenhouse drought stress experiments will be performed. Agronomic performance of select barley lines identified in Goal 3 will be determined under a range of simulated drought conditions. Based on the outcome of these experiments, one linewill be selected for subsequent RNA-seq and metatranscriptomics experiments to elucidate key genes that are expressed in the plant and rhizosphere microbiome in response to different levels of drought.

Impacts
What was accomplished under these goals? Goals 1 & 2: Project accomplishments this past year addressed Goals 1 & 2 which are to (1) Characterize the rhizosphere microbiome associated with diverse barley lines and perform a GWAS and (2) Assess the contribution of host genotype and environment to the structure of the recruited rhizosphere microbiome. To address these goals, analysis was performed on a diverse panel of 281 barley lines that was grown in 3 locations in 2021 and 2022. Rhizosphere microbiome data analysis is under way. Multi-location comparisons of microbial community alpha and beta diversity measurements are underway. Random forest and core microbiome analysis have been performed to identify key microorganisms in each environment. These results are being used to peform GWAS toidentify genetic elements contributing to differences in microbial community composition across different environments. A manuscript has been submitted whichevaluates the local adaptation of these lines in different environments. Goal 3: Based on yield and home field advantage scores, a subset of 10 barley lines were selected for a greanhouse reciprocal transplant study where sterile soil from the CARC site were inoculated with microorganisms from Bozeman soil and sterile soils from the Bozeman site were inoculated with CARC soil microorganisms. Agronomic data were collected from the barley lines grown under these conditions and analysis of the data are under way.

Publications

  • Type: Journal Articles Status: Under Review Year Published: 2023 Citation: Ewing, P, Kantar, MB, Williams, J, Killian, E, Sherman, J, Neyhart, J, Lachowiec, J, Eberly, J. Local adaptation and broad performance are synergistic to productivity in modern barley. Crop Science


Progress 09/01/21 to 08/31/22

Outputs
Target Audience:Co-PI Lachowiec and Ph.D. student Williams presented at the MSU Post Farms annual Field Day to around 100 regional farmers, ranchers, agricultural professionals ,and researchers. Co-PI Ewing presented this work at the Brookings, SD field day to around 50 participants. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided?Ph.D. student Killian has recieved training in bioinformatics methods for analyzing microbial community data. Co-PI Jennifer Lachowiec's has an undergraduate student who is receiving training in laboratory techniques for research in plants and microbes through this project. Co-PI Patrick Ewing has two undergraduate students he is mentoring and training as part of this project. How have the results been disseminated to communities of interest?Outreach activities included Co-PI Lachowiec and Ph.D. student Williams presenting the project at the MSU Post Farms annual Field Day to around 100 regional farmers, ranchers, agricultural professionals, and researchers. Co-PI Ewing presented this work at the Brookings, SD field day to around 50 participants. What do you plan to do during the next reporting period to accomplish the goals?Goals 1 & 2 Data analysis will continue. We anticipate completing the microbial community analysis from the field trials and GWAS analysis during the next reporting period. A manuscript is currently in preparation and we anticipate submitting it in the spring. Goal 3 Greenhouse reciprocal transplant and drought stress experiments will be performed. Agronomic performance of select barley lines will be determined under a range of simulated drought conditions. Based on the outcome of these experiments, a subset of lines will be selected for subsequent metatranscriptomics experiments.

Impacts
What was accomplished under these goals? Goals 1 & 2 Project accomplishments this past year addressed Goals 1 & 2 which are to (1) Characterize the rhizosphere microbiome associated with diverse barley lines and perform a GWAS and (2) Assess the contribution of host genotype and environment to the structure of the recruited rhizosphere microbiome. To address these goals, a diverse panel of 281 barley lines was grown in 3 locations this past growing season. At the MSU Central Ag Research Center (CARC) in Moccasin, MT, the study was planted and managed by PI Jed Eberly with assistance from Ph.D. students Erik Killian and Jessica Williams, along with support staff at the CARC. At the Post Farm in Bozeman, MT The study was planted and managed by Co-PI Jamie Sherman with support from Ph.D. students Erik Killian and Jessica Williams, along with support staff from Post Farm. At the 3rd location at USDA-ARS Integrated Cropping Systems Research Unit in Brookings, SD, co-PI Patrick Ewing was responsible for planting and managing the study. Root samples were collected at early stem elongation and rhizosphere extractions were performed. DNA extractions are underway in preparation for sequencing the rhizosphere microbial community. Agronomic data, including yield, protein, productive tillers, and biomass was collected for each study. Rhizosphere microbiome data analysis is under way. Microbial community alpha and beta diversity measurements have been performed and multi-location comparisons are underway. GWAS is being performed with the microbial community alpha and beta diversity measurements in order to identify genetic elements contributing to differences in microbial community composition. A manuscript has been drafted which compares performance of the barley lines across 3 locations and evaluates the local adaptation of these lines in different environments. Goal 3 Based on yield and home field advantage scores, a subset of 10 barley lines were selected for a greanhouse reciprocal transplant study where sterile soil from the CARC site were inoculated with microorganisms from Bozeman soil and sterile soils from the Bozeman site were inoculated with CARC soil microorganisms. Agronomic data were collected from the barley lines grown under these conditions and rhizosphere DNA sequencing will be performed this winter to compare differences in the rhizosphere microbiomes recruited under these conditions to those in soils containing the native microbial community. Based on these results, a subset of these barley lines will be selected to grow under different levels of drought stress to further evaluate changes in the rhizosphere microbiome.

Publications

  • Type: Conference Papers and Presentations Status: Other Year Published: 2022 Citation: Killian E, Lachowiec J, Eberly J, Cook J. Developing Open-Source Pipelines to Process Plot-Level UAV Imagery. ASA, CSSA and SSSA Annual Meeting. 6-9 November, Baltimore, MD


Progress 09/01/20 to 08/31/21

Outputs
Target Audience:PI Jed Eberly along with Ph.D. students Jessica Williams and Erik Killian, presented this project at the MSU Central Ag Research Center annual Field Day on July 13, 2021 to an audience of around 50 regional farmers and ranchers. Ph.D. students Williams and Killian also presented this work at the MSU Post Farms annual Field Day to around 100 regional farmers, ranchers, and researchers. PI Eberly presented this work to the Chouteau County Extension Advisory Board. Graduate studen Erik Killian also presented this work for the PSPP Department Graduate Seminar Series on April 13, 2021 to an audience of around 30 students. Co-PI Patrick Ewing also discussed this project with stakeholders in a meeting with the North American Millers Association on May 18th, 2021. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided?Co-PI Jennifer Lachowiec's has an undergraduate student who is receiving training in laboratory techniques for research in plants and microbes through this project. Co-PI Patrick Ewing has two undergraduate students he is mentoring and training as part of this project. He also had three additional undergraduate students who were mentored during the summer. How have the results been disseminated to communities of interest? Nothing Reported What do you plan to do during the next reporting period to accomplish the goals?To accomplish Goals 1 & 2, DNA sequencing and analysis will be performed during the winter of 2021-2022 on rhizosphere samples collected this past growing season. Microbial community sequncing results along with agronomic data will be used to perform a Genome Wide Association Study (GWAS) to identify QTL that contribute to local adaptation due to microbial recruitment within the barley genome. Reciprocal transplant studies will also be initiated in the greenhouse to assess microbiome recruitmentin locally adapted lines identified in the GWAS. In the secound half of 2022, additional greenhouse studies will be established to address the aim of Goal 3 which is to characterize the sources of variation in crop phenotype and microbiome functions that lead to enhanced performance in drought response. Top performing lines identifed in the field studies will be grown in the greenhouse under five drought stress levels and barley root and rhizosphere microbiome transcriptomics will be performed to identify candidate genes, pathways and networks involved in drought response.

Impacts
What was accomplished under these goals? Impact Plant breeding contributes approximately 50% of yearly yield increases, but current rates of gain are not sufficient to meet future food demands. Crops have historically been bred for consistent performance across multiple locations, rather than high performance in a few locations. However, recent work has suggested leveraging local adaptation may increase both yields and breeding efficiency. Evidence suggests that much of this local compatibility is a result of synergy between the host crop genotype, local environment, and the local soil microbiome. More research is needed to understand these complex interactions. To gain insight into these interactions between crop genotyp, environment, and the soil microbiome, field studies were performed with a genetically diverse selection of barley lines. These barley lines were planted in 3 different environments and agronomic performance data, including yield, biomass, and protein, was collected. Root samples were also collected to evaluate the root-associated microbial community. Accomplishments Goals 1 & 2 Project accomplishments this past year addressed Goals 1 & 2 which are to (1) Characterize the rhizosphere microbiome associated with diverse barley lines and perform a GWAS and (2) Assess the contribution of host genotype and environment to the structure of the recruited rhizosphere microbiome. To address these goals, a diverse panel of 281 barley lines was grown in 3 locations this past growing season. At the MSU Central Ag Research Center (CARC) in Moccasin, MT, the study was planted and managed by PI Jed Eberly with assistance from Ph.D. students Erik Killian and Jessica Williams, along with support staff at the CARC. At the Post Farm in Bozeman, MT The study was planted and managed by Co-PI Jamie Sherman with support from Ph.D. students Erik Killian and Jessica Williams, along with support staff from Post Farm. At the 3rd location at USDA-ARS Integrated Cropping Systems Research Unit in Brookings, SD, co-PI Patrick Ewing was responsible for planting and managing the study. Root samples were collected at early stem elongation and rhizosphere extractions were performed. DNA extractions are underway in preparation for sequencing the rhizosphere microbial community. Agronomic data, including yield, protein, productive tillers, and biomass was collected for each study. An additional study was planted this fall by PI Jed Eberly and Co-PI Mikey Kantar at the Kunia Research Farm in Oahu, HI. Goal 3 Nothing to report Goal 4 Nothing to report

Publications