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Title: Development and use of bioenergy feedstocks for semi-arid and arid lands

Journal Article · · Journal of Experimental Botany
DOI:https://doi.org/10.1093/jxb/erv087· OSTI ID:1265707
 [1];  [2];  [3];  [4]
  1. Univ. of Nevada, Reno, NV (United States). Dept. of Biochemistry & Molecular Biology
  2. Ohio Univ., Athens, OH (United States). Voinovich School of Leadership and Public Affairs and Dept. of Environmental and Plant Biology
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biosciences Division
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biosciences Division; Newcastle Univ., Newcastle upon Tyne (United Kingdom). School of Biology

Here we report that global climate change is predicted to increase heat, drought, and soil-drying conditions, and thereby increase crop sensitivity to water vapour pressure deficit, resulting in productivity losses. Increasing competition between agricultural freshwater use and municipal or industrial uses suggest that crops with greater heat and drought durability and greater water-use efficiency will be crucial for sustainable biomass production systems in the future. Agave (Agavaceae) and Opuntia (Cactaceae) represent highly water-use efficient bioenergy crops that could diversify bioenergy feedstock supply yet preserve or expand feedstock production into semi-arid, abandoned, or degraded agricultural lands, and reclaim drylands. Agave and Opuntia are crassulacean acid metabolism species that can achieve high water-use efficiencies and grow in water-limited areas with insufficient precipitation to support traditional C3 or C4 bioenergy crops. Both Agave and Opuntia have the potential to produce above-ground biomass rivalling that of C3 and C4 crops under optimal growing conditions. The low lignin and high amorphous cellulose contents of Agave and Opuntia lignocellulosic biomass will be less recalcitrant to deconstruction than traditional feedstocks, as confirmed by pretreatments that improve saccharification of Agave. Refined environmental productivity indices and geographical information systems modelling have provided estimates of Agave and Opuntia biomass productivity and terrestrial sequestration of atmospheric CO2; however, the accuracy of such modelling efforts can be improved through the expansion of field trials in diverse geographical settings. Lastly, we note that life cycle analysis indicates that Agave would have productivity, life cycle energy, and greenhouse gas balances comparable or superior to those of traditional bioenergy feedstocks, but would be far more water-use efficient.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725; SC0008834
OSTI ID:
1265707
Journal Information:
Journal of Experimental Botany, Vol. 66, Issue 14; ISSN 0022-0957
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 65 works
Citation information provided by
Web of Science

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Undervalued potential of crassulacean acid metabolism for current and future agricultural production journal June 2019
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Transcriptome analysis of bolting in A. tequilana reveals roles for florigen, MADS, fructans and gibberellins journal June 2019
New insights into plant glycoside hydrolase family 32 in Agave species journal August 2015
Low Nitrogen Priming Enhances Photosynthesis Adaptation to Water-Deficit Stress in Winter Wheat (Triticum aestivum L.) Seedlings journal June 2019
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