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Article
Expression of Cyanobacterial FBP/SBPase in Soybean Prevents Yield Depression under Future Climate Conditions
Journal of Experimental Botany
  • Iris H. Kohler, United States Department of Agriculture
  • Ursula M. Ruiz-Vera, University of Illinois at Urbana-Champaign
  • Andy VanLoocke, Iowa State University
  • Michell L. Thomey, United States Department of Agriculture
  • Tom Clemente, University of Nebraska - Lincoln
  • Stephen P. Long, University of Illinois at Urbana-Champaign
  • Donald R. Ort, United States Department of Agriculture
  • Carl J. Bernacchi, United States Department of Agriculture
Document Type
Article
Publication Version
Published Version
Publication Date
12-12-2016
DOI
10.1093/jxb/erw435
Abstract
Predictions suggest that current crop production needs to double by 2050 to meet global food and energy demands. Based on theory and experimental studies, overexpression of the photosynthetic enzyme sedoheptulose-1,7-bisphosphatase (SBPase) is expected to enhance C3 crop photosynthesis and yields. Here we test how expression of the cyanobacterial, bifunctional fructose-1,6/sedoheptulose-1,7-bisphosphatase (FBP/SBPase) affects carbon assimilation and seed yield (SY) in a major crop (soybean, Glycine max). For three growing seasons, wild-type (WT) and FBP/SBPase-expressing (FS) plants were grown in the field under ambient (400 μmol mol−1) and elevated (600 μmol mol−1) CO2 concentrations [CO2] and under ambient and elevated temperatures (+2.7 °C during daytime, +3.4 °C at night) at the SoyFACE research site. Across treatments, FS plants had significantly higher carbon assimilation (4–14%), Vc,max (5–8%), and Jmax (4–8%). Under ambient [CO2], elevated temperature led to significant reductions of SY of both genotypes by 19–31%. However, under elevated [CO2] and elevated temperature, FS plants maintained SY levels, while the WT showed significant reductions between 11% and 22% compared with plants under elevated [CO2] alone. These results show that the manipulation of the photosynthetic carbon reduction cycle can mitigate the effects of future high CO2 and high temperature environments on soybean yield.
Comments

This article is from Journal of Experimental Botany (2016): doi: 10.1093/jxb/erw435. Posted with permission.

Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Language
en
File Format
application/pdf
Citation Information
Iris H. Kohler, Ursula M. Ruiz-Vera, Andy VanLoocke, Michell L. Thomey, et al.. "Expression of Cyanobacterial FBP/SBPase in Soybean Prevents Yield Depression under Future Climate Conditions" Journal of Experimental Botany (2016)
Available at: http://works.bepress.com/andy_vanloocke/21/