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Title: Bioenergy sorghum crop model predicts VPD-limited transpiration traits enhance biomass yield in water-limited environments

Abstract

Bioenergy sorghum is targeted for production in water-limited annual cropland therefore traits that improve plant water capture, water use efficiency, and resilience to water deficit are necessary to maximize productivity. A crop modeling framework, APSIM, was adapted to predict the growth and biomass yield of energy sorghum and to identify potentially useful traits for crop improvement. APSIM simulations of energy sorghum development and biomass accumulation replicated results from field experiments across multiple years, patterns of rainfall, and irrigation schemes. Modeling showed that energy sorghum’s long duration of vegetative growth increased water capture and biomass yield by ~30% compared to short season crops in a water-limited production region. Additionally, APSIM was extended to enable modeling of VPD-limited transpiration traits that reduce crop water use under high vapor pressure deficits (VPDs). The response of transpiration rate to increasing VPD was modeled as a linear response until a VPD threshold was reached, at which the slope of the response decreases, representing a range of responses to VPD observed in sorghum germplasm. Simulation results indicated that the VPD-limited transpiration trait is most beneficial in hot and dry regions of production where crops are exposed to extended periods without rainfall during the season or tomore » a terminal drought. In these environments, slower but more efficient transpiration increases biomass yield and prevents or delays the exhaustion of soil water and onset of leaf senescence. The VPD-limited transpiration responses observed in sorghum germplasm increased biomass accumulation by 20% in years with lower summer rainfall, and the ability to drastically reduce transpiration under high VPD conditions could increase biomass by 6% on average across all years. This work indicates that the productivity and resilience of bioenergy sorghum grown in water-limited environments could be further enhanced by development of genotypes with optimized VPD-limited transpiration traits and deployment of these crops in water limited growing environments. As a result, the energy sorghum model and VPD-limited transpiration trait implementation aremade available to simulate performance in other target environments.« less

Authors:
 [1];  [1];  [1]
  1. Texas A & M Univ., College Station, TX (United States)
Publication Date:
Research Org.:
Texas A & M Univ., College Station, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1367176
Grant/Contract Number:  
SC0012629; FC02-07ER64494; AR0000596
Resource Type:
Accepted Manuscript
Journal Name:
Frontiers in Plant Science
Additional Journal Information:
Journal Volume: 8; Journal ID: ISSN 1664-462X
Publisher:
Frontiers Research Foundation
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES; 09 BIOMASS FUELS; energy sorghum; vapor pressure deficit; limited transpiration; crop model; water-limited environments; biomass; APSIM

Citation Formats

Truong, Sandra K., McCormick, Ryan F., and Mullet, John E. Bioenergy sorghum crop model predicts VPD-limited transpiration traits enhance biomass yield in water-limited environments. United States: N. p., 2017. Web. doi:10.3389/fpls.2017.00335.
Truong, Sandra K., McCormick, Ryan F., & Mullet, John E. Bioenergy sorghum crop model predicts VPD-limited transpiration traits enhance biomass yield in water-limited environments. United States. https://doi.org/10.3389/fpls.2017.00335
Truong, Sandra K., McCormick, Ryan F., and Mullet, John E. Tue . "Bioenergy sorghum crop model predicts VPD-limited transpiration traits enhance biomass yield in water-limited environments". United States. https://doi.org/10.3389/fpls.2017.00335. https://www.osti.gov/servlets/purl/1367176.
@article{osti_1367176,
title = {Bioenergy sorghum crop model predicts VPD-limited transpiration traits enhance biomass yield in water-limited environments},
author = {Truong, Sandra K. and McCormick, Ryan F. and Mullet, John E.},
abstractNote = {Bioenergy sorghum is targeted for production in water-limited annual cropland therefore traits that improve plant water capture, water use efficiency, and resilience to water deficit are necessary to maximize productivity. A crop modeling framework, APSIM, was adapted to predict the growth and biomass yield of energy sorghum and to identify potentially useful traits for crop improvement. APSIM simulations of energy sorghum development and biomass accumulation replicated results from field experiments across multiple years, patterns of rainfall, and irrigation schemes. Modeling showed that energy sorghum’s long duration of vegetative growth increased water capture and biomass yield by ~30% compared to short season crops in a water-limited production region. Additionally, APSIM was extended to enable modeling of VPD-limited transpiration traits that reduce crop water use under high vapor pressure deficits (VPDs). The response of transpiration rate to increasing VPD was modeled as a linear response until a VPD threshold was reached, at which the slope of the response decreases, representing a range of responses to VPD observed in sorghum germplasm. Simulation results indicated that the VPD-limited transpiration trait is most beneficial in hot and dry regions of production where crops are exposed to extended periods without rainfall during the season or to a terminal drought. In these environments, slower but more efficient transpiration increases biomass yield and prevents or delays the exhaustion of soil water and onset of leaf senescence. The VPD-limited transpiration responses observed in sorghum germplasm increased biomass accumulation by 20% in years with lower summer rainfall, and the ability to drastically reduce transpiration under high VPD conditions could increase biomass by 6% on average across all years. This work indicates that the productivity and resilience of bioenergy sorghum grown in water-limited environments could be further enhanced by development of genotypes with optimized VPD-limited transpiration traits and deployment of these crops in water limited growing environments. As a result, the energy sorghum model and VPD-limited transpiration trait implementation aremade available to simulate performance in other target environments.},
doi = {10.3389/fpls.2017.00335},
journal = {Frontiers in Plant Science},
number = ,
volume = 8,
place = {United States},
year = {Tue Mar 21 00:00:00 EDT 2017},
month = {Tue Mar 21 00:00:00 EDT 2017}
}

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Designing sorghum as a dedicated bioenergy feedstock
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Yield Results and Stability Analysis from the Sorghum Regional Biomass Feedstock Trial
journal, March 2014


Development and evaluation of a sorghum model based on CERES-Maize in a semi-arid tropical environment
journal, August 1990


Energy sorghum hybrids: Functional dynamics of high nitrogen use efficiency
journal, September 2013


The Stomatal Response to Reduced Relative Humidity Requires Guard Cell-Autonomous ABA Synthesis
journal, January 2013


Persistence of limited-transpiration-rate trait in sorghum at high temperature
journal, July 2015


APSIM – Evolution towards a new generation of agricultural systems simulation
journal, December 2014


Modelling environmental effects on phenology and canopy development of diverse sorghum genotypes
journal, March 2009


Genetic variability of transpiration response to vapor pressure deficit among sorghum genotypes
journal, October 2010

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Prognosis for genetic improvement of yield potential and water-limited yield of major grain crops
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Agrochemical control of plant water use using engineered abscisic acid receptors
journal, February 2015

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Chemical Screen for Limited-Transpiration-Rate Trait Among Sorghum Genotypes
journal, May 2014


Steep, cheap and deep: an ideotype to optimize water and N acquisition by maize root systems
journal, January 2013


Exploiting the potential of plants with crassulacean acid metabolism for bioenergy production on marginal lands
journal, April 2009

  • Borland, A. M.; Griffiths, H.; Hartwell, J.
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Adapting APSIM to model the physiology and genetics of complex adaptive traits in field crops
journal, April 2010

  • Hammer, Graeme L.; van Oosterom, Erik; McLean, Greg
  • Journal of Experimental Botany, Vol. 61, Issue 8
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Drought decision-making
journal, July 2010


Any trait or trait-related allele can confer drought tolerance: just design the right drought scenario
journal, September 2011


Transpiration efficiency: new insights into an old story
journal, March 2014

  • Vadez, Vincent; Kholova, Jana; Medina, Susan
  • Journal of Experimental Botany, Vol. 65, Issue 21
  • DOI: 10.1093/jxb/eru040

Energy Sorghum--a genetic model for the design of C4 grass bioenergy crops
journal, June 2014

  • Mullet, J.; Morishige, D.; McCormick, R.
  • Journal of Experimental Botany, Vol. 65, Issue 13
  • DOI: 10.1093/jxb/eru229

The Evolution of Mechanisms Driving the Stomatal Response to Vapor Pressure Deficit
journal, January 2015

  • McAdam, Scott A. M.; Brodribb, Timothy J.
  • Plant Physiology, Vol. 167, Issue 3
  • DOI: 10.1104/pp.114.252940

Stomatal Response to Abscisic Acid Is a Function of Current Plant Water Status
journal, February 1992

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  • DOI: 10.1104/pp.98.2.540

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journal, September 2015

  • Lobell, David B.; Hammer, Graeme L.; Chenu, Karine
  • Global Change Biology, Vol. 21, Issue 11
  • DOI: 10.1111/gcb.13022

Bioenergy crop models: descriptions, data requirements, and future challenges
journal, March 2012


Greater Sensitivity to Drought Accompanies Maize Yield Increase in the U.S. Midwest
journal, May 2014


Plant Productivity and Environment
journal, October 1982


Sorghum Phytochrome B Inhibits Flowering in Long Days by Activating Expression of SbPRR37 and SbGHD7, Repressors of SbEHD1, SbCN8 and SbCN12
journal, August 2014


Harnessing Genetic Variation in Leaf Angle to Increase Productivity of Sorghum bicolor
journal, August 2015


Limited-Transpiration Trait May Increase Maize Drought Tolerance in the US Corn Belt
journal, November 2015

  • Messina, Carlos D.; Sinclair, Thomas R.; Hammer, Graeme L.
  • Agronomy Journal, Vol. 107, Issue 6
  • DOI: 10.2134/agronj15.0016

Sorghum Crop Modeling and Its Utility in Agronomy and Breeding
book, January 2016


Is the Stay-Green Trait in Sorghum a Result of Transpiration Sensitivity to Either Soil Drying or Vapor Pressure Deficit?
journal, September 2013


Water-Use Efficiency in Crop Production
journal, January 1984

  • Sinclair, T. R.; Tanner, C. B.; Bennett, J. M.
  • BioScience, Vol. 34, Issue 1
  • DOI: 10.2307/1309424

() Represses Sorghum Flowering in Long Days: Alleles Enhance Biomass Accumulation and Grain Production
journal, January 2014


Works referencing / citing this record:

Vapour pressure deficit: The hidden driver behind plant morphofunctional traits in controlled environments
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Assessing plant performance in the Enviratron
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