Crops in silico project
As the Earth’s population climbs toward 9 billion by 2050 — and the world climate continues to change, affecting temperatures, weather patterns, water supply, and even the seasons — future food security has become a grand world challenge. Accurate prediction of how food crops react to climate change will play a critical role in ensuring food security.
An ability to computationally mimic the growth, development and response of crops to the environment will allow researchers to conduct many more experiments than can realistically be achieved in the field. Designing more sustainable crops to increase productivity depends on complex interactions between genetics, environment, and ecosystem. Therefore, creation of an in silico — computer simulation — platform that can link models across different biological scales, from cell to ecosystem level, has the potential to provide more accurate simulations of plant response to the environment than any single model could alone.
As a leader in plant biology, crop sciences and computer science, Illinois is uniquely positioned to head this initiative. Developments in high-performance computing, open-source version-controlled software, advanced visualization tools, and functional knowledge of plants make achieving the concept realistic. The interdisciplinary Crops in silico (Cis) team will take advantage of resources in the National Center for Supercomputing Applications (NCSA) and the Institute for Sustainability, Energy, and Environment (iSEE) — and its academic and research expertise in plant biology, crop sciences, and bioengineering — to build a user-friendly platform for plant scientists around the globe who are working on the food security challenge.
- Summer 2017 Progress Update
- Foundation for Food and Ag Research Supports Cis
- Paper from 2016 Workshop: A call for Integrative, Multi-scale Crop Modeling Platform
- Cis Symposium & Workshop: 2016 and ’17
- Global Food Summit
- Summer 2016 Progress Update
In the past year, the team continued to develop and improve the accuracy of its models. Among other technical news …
- The molecular model developed by Balaji Panneerselvam, a Chemical & Biomolecular Engineering Postdoc, was used to simulate the phosphorylated and unphosphorylated states of a key nitrate transporter and characterize the nitrate transport cycle. This model will soon be combined with the work by Stuti Shrivastava, a Plant Biology Ph.D. Candidate, whose gene-level model was optimized to determine the effects of changing nitrate uptake rate and cellular concentrations on protein levels for the nitrate transporters and their regulators. Shrivastava has also identified punitive transcription factors that can potentially regulate the expression of nitrate transporter genes.
- Plant Biology Ph.D. Candidate Kavya Kannan improved her gene-level model of the metabolite pools of photosynthesis in response to elevated CO2 by accounting for mRNA translation and degradation rates. This model was merged with IGB Postdoc Yu Wang’s metabolic model that simulates the processes of photosynthesis under elevated CO2 and temperature and IGB Postdoc Venkat Srinivasan’s system-level model that simulates carbon partitioning between the leaf and roots, and sugar-starch portioning under elevated CO2. A manuscript reporting the result of these merged models is in preparation for submission.
- The rendering of plant- and canopy-level data derived from the system model and measured field data of soybean over the course of a growing season was updated by AJ Christensen, a visualization programmer for NCSA’s Advanced Visualization Lab, to include seed pod development and leaf senescence.
- Yiwen Xu, a graduate student in Computer Science, developed algorithms to reconstruct 3D plant models from video images. Her prototype system can precisely reconstruct 3D plant models from videos with little human interaction.
The Foundation for Food and Agriculture Research (FFAR) has awarded Principal Investigator Amy Marshall-Colón, Assistant Professor of Plant Biology at the University of Illinois at Urbana-Champaign, $274,000 to continue her research in support of Crops in silico (Cis), a project to develop a suite of virtual plant models that may help resolve a growing gap between food supply and demand in the face of global climate change.
Marshall-Colón (pictured) will collaborate with Stephen P. Long, the Gutgsell Endowed Professor of Crop Sciences and Plant Biology; Matthew Turk, Assistant Professor of Information Sciences, Assistant Research Professor of Astronomy and National Center for Supercomputing Applications (NCSA) Research Scientist (also pictured); Christine Kirkpatrick, Executive Director of the National Data Service; and Jonathan Lynch, University Distinguished Professor of Plant Science at Penn State University.
Team members will integrate above- and below-ground models of plants to create never-before-seen “whole views” of them. Then, they will subject these newly built virtual plants to computer-simulated extreme growing conditions — from flood to severe drought to increased ambient carbon dioxide — and compare the model’s predicted plant reaction to observed responses from field studies. This will help “dial in” the model’s accuracy.
The FFAR grant is the first given to a University of Illinois researcher.
In a Frontiers in Plant Science perspective article this month, a group of 30 researchers from around the world outlined a vision for a modeling framework that reconstructs a virtual plant — from the gene upward — that can accurately predict crop responses to environmental disturbances.
Crops in silico (Cis), as the envisioned tool is called, seeks a never-before-achieved level of detail, collaboration, and robustness in modeling. The goal is to create an open-source software to link individual plant models across biological scales — from a single cell to an entire ecosystem of plants.
Led by a team of plant biologists and computer scientists at the University of Illinois, more than 50 experts in modeling plant processes, computation, and informational visualization were assembled on the Urbana-Champaign campus in spring 2016 to discuss the challenges of achieving this revolutionary tool for crop research.
The Frontiers article is a synthesis of thoughts from the keynote speeches and plenary sessions at that event.
The writers acknowledge the many challenges to forming a comprehensive, integrative, internationally used modeling tool. For one, the models they hope to combine are written in a variety of coding languages and have different methods of documentation, making communication challenging. Also, many datasets that would benefit the whole modeling community are privately held.
To overcome these challenges, they highlight a four-part roadmap to success:
- Form a diverse and trusting research community of biologists, modelers, and visualization experts. Researchers can then more easily share data sets and work together to develop standards for models that can easily talk to one another;
- Build a framework capable of hosting and combining individual models. The Cis platform is intended to be the user interface from which researchers will view and launch models, libraries, data repositories, and so forth;
- Define a shared vocabulary, coding style, and translation guides to help unite diverse crop models into one program; and
- Nurture both the tool and cultivate its community of supporters and users. Annual meetings of the community, formation of a supporting nonprofit organization, and securing both federal and private funding will be essential to long-term success.
“The Cis initiative has the potential to be a powerful discovery tool in which dozens of simulations across multiple scenarios can be accomplished in a few hours,” the authors wrote.
Beyond a technological breakthrough, the Cis team also aims to achieve a research community shift.
“We believe Crops in silico will unite largely isolated efforts into a connected and collaborative community that can take full advantage of advances in computation science and mechanistic understanding of plant processes and their responses to the environment,” said lead author and Plant Biology Assistant Professor Amy Marshall-Colón, a Principal Investigator in the Crops in silico project at Illinois.
The Cis project was seed-funded in 2015 by a $350,000 grant from the Institute for Sustainability, Energy, and Environment (iSEE) at the University of Illinois at Urbana-Champaign. The Crops in silico symposium was supported by iSEE, the National Center for Supercomputing Applications (NCSA), the Carl R. Woese Institute for Genomic Biology (IGB), the College of Agricultural, Consumer and Environmental Sciences, the School of Molecular and Cellular Biology, and the Departments of Crop Sciences and Plant Biology and the Olga G. Nalbandov Lecture Funds. Read more on the project page on iSEE’s website, or visit the Cis homepage at cropsinsilico.org.
To see the full perspective article on Cis, visit the Frontiers in Plant Science website.
The 2016 Plants in silico Symposium & Workshop — which brought together local, national, and international experts to exchange information and collaborate on a course for achieving plants in silico — was May 18-20 at the National Center for Supercomputer Applications (NCSA) on the Urbana-Champaign campus of the University of Illinois. It featured presentations by leading experts in modeling plant processes, top scientists in achieving in silico representation of other organisms, and computational scientists. Read more about the 2016 event >>>
iSEE, NCSA, and the Crops in silico team are grateful for a generous gift from the Olga G. Nalbandov Lecture Fund, which helped to make the event possible. Other contributors: the Carl R. Woese Institute for Genomic Biology (IGB); the College of Agricultural, Consumer and Environmental Sciences (ACES); the Department of Crop Sciences; the School of Molecular and Cellular Biology (MCB); the Department of Plant Biology; and the Genomic Ecology of Global Change Theme at IGB.
Cis co-PI Amy Marshall-Colón and team member AJ Christensen, a National Center for Supercomputing Applications (NCSA) Visualization Programmer, attended the Global Open Data For Agriculture and Nutrition (GODAN) Summit in September 2016 in New York. Marshall-Colón and Christensen created a writeup on the summit and a mini-documentary on the power of visualization and digital labs in helping to solve the impending world food crisis.
In the past year, some technical developments …
- Cis has developed multiple models:
- a molecular model of At1, a key nitrate transporter;
- a gene-level model of the effects of changing nitrate uptake rate and cellular concentrations on transcript and metabolite levels;
- a gene-level model of the effects of changing atmospheric carbon dioxide concentrations on transcript and metabolite levels;
- a metabolic model that simulates the processes of photosynthesis under elevated atmospheric CO2 concentrations;
- a system-level model that simulates carbon partitioning between the leaf and roots, and sugar-starch portioning under elevated atmospheric CO2 concentrations;
- a solar light absorption model using bi-directional path tracing.
- Cis has rendered plant- and canopy- level data derived from the system model and measured field data of soybean over the course of a growing season. This data includes phenotypic differences between soybean growing under ambient and elevated atmospheric CO2.
- Cis constructed a run-time communications system for integration. The system provides global control, logging, and debugging support and permits new models to be integrated without requiring change to existing models. The metabolic and bio-system models are on line, with others being added as they become ready for testing.
Principal Investigators and co-PIs
- Stephen Long, Professor of Crop Sciences and Plant Biology (in group photo at right). His Crop Sciences page. His Plant Biology page. His lab page.
- Amy Marshall-Colón, Assistant Professor of Plant Biology (in group photo at right). Her departmental page. Her lab page.
- Donna Cox, Professor of Art + Design and NCSA Director of Advanced Scientific Visualization Laboratory (in group photo above). Her NCSA page. Her lab page.
- John Hart, Professor of Computer Science (in group photo at right). His departmental page. His parallel computing page.
- Christine Kirkpatrick, Executive Director of the National Data Service at National Center for Supercomputing Applications (not pictured). Her NCSA page.
- Diwakar Shukla, Assistant Professor of Chemical and Biomolecular Engineering (in group photo at right). His departmental page. His lab page.
- Matthew Turk, Assistant Professor of Information Sciences; Assistant Research Professor of Astronomy; National Center for Supercomputing Applications (NCSA) Research Scientist (not pictured). His Astronomy page. His NCSA lab page.
- Kalina Borkiewicz, Visualization Programmer, Advanced Visualization Lab, NCSA (not pictured). Her departmental page.
- AJ Christensen, Visualization Programmer, Advanced Visualization Lab, NCSA (right). The AVL team page.
- Kavya Kannan, Ph.D. Candidate in Plant Biology (not pictured). Read more about Kavya and her work >>>
- Meagan Lang, Postdoctoral Research Associate at the National Center for Supercomputing Applications (NCSA) (not pictured). Her webpage.
- Balaji Panneerselvam, Postdoctoral Researcher in Chemical and Biomolecular Engineering (in group photo above).
- Stuti Shrivastava, Ph.D. Candidate in Plant Biology (right). Her NCSA page. Read more about Stuti and her work >>>
- Venkat Srinivasan, Postdoctoral Researcher at Carl R. Woese Institute for Genomic Biology (in group photo above). His lab page.
- Yu Wang, Postdoctoral Researcher at Carl R. Woese Institute for Genomic Biology (in group photo above). Her lab page.
- Gabrielle Allen, Associate Professor of Astronomy and NCSA Director of Computing and Data Sciences (right). Her departmental page. Her NCSA page.
- Daniel Katz, NCSA Assistant Director of Scientific Software and Applications (not pictured). His NCSA page. His webpage.
- Bertram Ludäscher, Professor of Library and Information Science and Director of the Center for Informatics Research in Science and Scholarship (right). His departmental page. His center page.
- Donald Ort, Professor of Plant Biology (right). His departmental page. His lab page.
- H. Edward Seidel, Director of the National Center for Supercomputing Applications (right). His NCSA page.
- Xinguang Zhu, Group Leader at the Institute of Computational Biology in the Chinese Academy of Science (right). His institute page.
- Rachel Shekar, Grant Program Manager (in group photo above).
Former co-PIs, Team Members, and Advisers
- Apollo Ellis, Ph.D. Candidate in Computer Science (not pictured). His webpage.
- Victor Jongeneel, Director of Bioinformatics at the Carl R. Woese Institute for Genomic Biology (IGB) (right). His IGB page.
- James O’Dwyer, Assistant Professor of Plant Biology (in group photo above). His departmental page. His lab page.
- Cameron Pittelkow, Assistant Professor of Crop Sciences (right). His departmental page. His lab page.
- David Raila, Senior Research Programmer for NCSA National Data Service (in group photo above). His NCSA page.
- Yiwen Xu, M.S. Candidate in Computer Science (in group photo above).
Partners, Departments & Units
Publications & Presentations
(iSEE project members’ names in bold)
- Publication: “Crops in silico: Generating Virtual Crops Using an Integrative and Multi-scale Modeling Platform,” Marshall-Colon, A.; Long, S.P; Allen, D.K.; Allen, G.; Beard, D.A.; Benes, B.; von Caemmerer, S.; Christensen, A.J.; Cox, D.J.; Hart, J.C.; Hirst, P.M.; Kannan, K.; Katz, D.S.; Lynch, J.P; Millar, A.J.; Panneerselvam, B.; Price, N.D.; Prusinkiewicz, P.; Raila, D.; Shekar, R.G.; Shrivastava, S.; Shukla, D.; Srinivasan, V.; Stitt, M.; Turk, M.J.; Voit, E.O.; Wang, Y.; Yin, X.; Zhu, X. Frontiers in Plant Science, May 2017.
- Presentation: “Automistic Determination of the Conformational Switches in Membrane Transporter Proteins.” Panneerselvam, B.; Shukla, D. 2017 Blue Waters Symposium, Sunriver, OR, May 2017.
- Presentation: “Understanding the Conformational Diversity of the Proton-coupled Oligopeptide Transporter (POT) Family.” Panneerselvam, B. 61st Annual Meeting of the Biophysical Society, New Orleans, LA, February 2017.
- Presentation: “Crops in silico: A Communitywide Multi-scale Computational Modeling Framework of Plant Canopies.” Srinivasan, V.; Christensen, A.J.; Borkiewicz, K.; Xu, Y.; Ellis, A.; Panneerselvam, B.; Kannan, K.; Shrivastava, S.; Cox, D.J.; Hart, J.; Marshall-Colón, A.; Long, S.P. American Geophysical Union Fall Meeting, San Francisco, CA, December 2016.
- Presentation: “A Vision of Crops in silico – from Gene Function to a Growing Plant.” Marshall-Colón, A. Crop Engineering Consortium, London, England, October 2016.
- Presentation: “Research Discussion – Crops in silico.” Marshall-Colón, A. Grand Challenges Annual Meeting, London, England, October 2016.
- Presentation and video: “How Supercomputers and Visualization Can Help the Global Food Crisis,” Global Open Data for Agriculture and Nutrition (GODAN) Summit, New York, NY, September 2016.
- Presentation: “In-silico Model Integration of Nitrogen Transporter, NRT1.1 with Nitrogen Responsive Transcription Factor Network,” Shrivastava, S. Poster session at the Plant Biology 2016 Meeting in Austin, TX, July 2016.
- Presentation: “In-silico Predictions of Conformational States of Plant and Bacterial Transporters,” Panneerselvam, B., Mittal, S., Shukla, D. Poster session at the Plant Biology 2016 Meeting in Austin, TX, July 2016.
- Publication: “Crops in silico: Why, Why Now and What? An Integrative Platform for Plant Systems Biology Research,” Zhu, X.; Lynch, J.P.; LeBauer, D.S.; Millar, A.J.; Stitt, M.; Long, S.P. Plant, Cell & Environment, January 2016.
Read More about Cis …