Impact of Drought on Chemical Composition and Sugar Yields From Dilute-Acid Pretreatment and Enzymatic Hydrolysis of Miscanthus, a Tall Fescue Mixture, and Switchgrass
Environmental factors like drought impact the quality of biomass entering a bioconversion process. Drought often reduces the sugar content in lignocellulosic biomass, which could have economic impacts, particularly when compounded with losses in dry biomass yield; however, the effects on conversion...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2018-06-01
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| Series: | Frontiers in Energy Research |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fenrg.2018.00054/full |
| _version_ | 1798045097698263040 |
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| author | Amber Hoover Rachel Emerson Allison Ray Daniel Stevens Sabrina Morgan Marnie Cortez Robert Kallenbach Matthew Sousek Rodney Farris Dayna Daubaras |
| author_facet | Amber Hoover Rachel Emerson Allison Ray Daniel Stevens Sabrina Morgan Marnie Cortez Robert Kallenbach Matthew Sousek Rodney Farris Dayna Daubaras |
| author_sort | Amber Hoover |
| collection | DOAJ |
| description | Environmental factors like drought impact the quality of biomass entering a bioconversion process. Drought often reduces the sugar content in lignocellulosic biomass, which could have economic impacts, particularly when compounded with losses in dry biomass yield; however, the effects on conversion efficiency are not completely understood. This study investigated how drought may impact biomass composition and sugar yields from dilute-acid pretreatment and enzymatic hydrolysis of Miscanthus, a tall fescue mixture, and switchgrass from Nebraska, Missouri, and Oklahoma, respectively, grown as part of Regional Feedstock Partnership field trials. Samples were grown and harvested in 2010 during non-drought conditions and in 2012 during extreme drought conditions. Non-structural glucose and proline were significantly greater in 2012 compared with 2010 for Miscanthus, which suggests drought stress occurred. Structural glucan and xylan were significantly decreased in 2012 for Miscanthus; however, reactivity and sugar yields from dilute-acid pretreatment and enzymatic hydrolysis were significantly greater in 2012 compared with 2010, suggesting that although structural sugars may decrease during drought conditions, sugar yields and reactivity may increase. For the tall fescue mixture, proline was greater, and structural sugars were lower in 2012, indicating drought stress, but minimal differences were observed in the conversion experiments. Few differences were observed for switchgrass composition and reactivity between years. The observed patterns are likely because of site-specific climatic conditions combined with the tolerance each species may have to drought. As drought occurrence and severity have increased, it is necessary to understand drought impacts to mitigate risks to future bioenergy industry growth. |
| first_indexed | 2024-04-11T23:16:19Z |
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| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-04-11T23:16:19Z |
| publishDate | 2018-06-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Energy Research |
| spelling | doaj.art-324658f01a0247e48f204e914cb293ee2022-12-22T03:57:37ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2018-06-01610.3389/fenrg.2018.00054347355Impact of Drought on Chemical Composition and Sugar Yields From Dilute-Acid Pretreatment and Enzymatic Hydrolysis of Miscanthus, a Tall Fescue Mixture, and SwitchgrassAmber Hoover0Rachel Emerson1Allison Ray2Daniel Stevens3Sabrina Morgan4Marnie Cortez5Robert Kallenbach6Matthew Sousek7Rodney Farris8Dayna Daubaras9Idaho National Laboratory, Idaho Falls, ID, United StatesIdaho National Laboratory, Idaho Falls, ID, United StatesIdaho National Laboratory, Idaho Falls, ID, United StatesIdaho National Laboratory, Idaho Falls, ID, United StatesIdaho National Laboratory, Idaho Falls, ID, United StatesIdaho National Laboratory, Idaho Falls, ID, United StatesDivision of Plant Sciences, University of Missouri, Columbia, MO, United StatesDepartment of Agronomy & Horticulture, University of Nebraska-Lincoln, Lincoln, NE, United StatesOklahoma Agricultural Experiment Station, Oklahoma State University, OK, United StatesIdaho National Laboratory, Idaho Falls, ID, United StatesEnvironmental factors like drought impact the quality of biomass entering a bioconversion process. Drought often reduces the sugar content in lignocellulosic biomass, which could have economic impacts, particularly when compounded with losses in dry biomass yield; however, the effects on conversion efficiency are not completely understood. This study investigated how drought may impact biomass composition and sugar yields from dilute-acid pretreatment and enzymatic hydrolysis of Miscanthus, a tall fescue mixture, and switchgrass from Nebraska, Missouri, and Oklahoma, respectively, grown as part of Regional Feedstock Partnership field trials. Samples were grown and harvested in 2010 during non-drought conditions and in 2012 during extreme drought conditions. Non-structural glucose and proline were significantly greater in 2012 compared with 2010 for Miscanthus, which suggests drought stress occurred. Structural glucan and xylan were significantly decreased in 2012 for Miscanthus; however, reactivity and sugar yields from dilute-acid pretreatment and enzymatic hydrolysis were significantly greater in 2012 compared with 2010, suggesting that although structural sugars may decrease during drought conditions, sugar yields and reactivity may increase. For the tall fescue mixture, proline was greater, and structural sugars were lower in 2012, indicating drought stress, but minimal differences were observed in the conversion experiments. Few differences were observed for switchgrass composition and reactivity between years. The observed patterns are likely because of site-specific climatic conditions combined with the tolerance each species may have to drought. As drought occurrence and severity have increased, it is necessary to understand drought impacts to mitigate risks to future bioenergy industry growth.https://www.frontiersin.org/article/10.3389/fenrg.2018.00054/fulldroughtconversion performancecompositionMiscanthusswitchgrasstall fescue |
| spellingShingle | Amber Hoover Rachel Emerson Allison Ray Daniel Stevens Sabrina Morgan Marnie Cortez Robert Kallenbach Matthew Sousek Rodney Farris Dayna Daubaras Impact of Drought on Chemical Composition and Sugar Yields From Dilute-Acid Pretreatment and Enzymatic Hydrolysis of Miscanthus, a Tall Fescue Mixture, and Switchgrass Frontiers in Energy Research drought conversion performance composition Miscanthus switchgrass tall fescue |
| title | Impact of Drought on Chemical Composition and Sugar Yields From Dilute-Acid Pretreatment and Enzymatic Hydrolysis of Miscanthus, a Tall Fescue Mixture, and Switchgrass |
| title_full | Impact of Drought on Chemical Composition and Sugar Yields From Dilute-Acid Pretreatment and Enzymatic Hydrolysis of Miscanthus, a Tall Fescue Mixture, and Switchgrass |
| title_fullStr | Impact of Drought on Chemical Composition and Sugar Yields From Dilute-Acid Pretreatment and Enzymatic Hydrolysis of Miscanthus, a Tall Fescue Mixture, and Switchgrass |
| title_full_unstemmed | Impact of Drought on Chemical Composition and Sugar Yields From Dilute-Acid Pretreatment and Enzymatic Hydrolysis of Miscanthus, a Tall Fescue Mixture, and Switchgrass |
| title_short | Impact of Drought on Chemical Composition and Sugar Yields From Dilute-Acid Pretreatment and Enzymatic Hydrolysis of Miscanthus, a Tall Fescue Mixture, and Switchgrass |
| title_sort | impact of drought on chemical composition and sugar yields from dilute acid pretreatment and enzymatic hydrolysis of miscanthus a tall fescue mixture and switchgrass |
| topic | drought conversion performance composition Miscanthus switchgrass tall fescue |
| url | https://www.frontiersin.org/article/10.3389/fenrg.2018.00054/full |
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