Biochemical Characterization of Amaranthus Cell Wall as a Lignocellulosic Biomass Resource in biorenewable Energy Production Andre Salazar Olga A. Zabotina.

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Presentation transcript:

Biochemical Characterization of Amaranthus Cell Wall as a Lignocellulosic Biomass Resource in biorenewable Energy Production Andre Salazar Olga A. Zabotina Biochemistry Department Iowa State University

Amaranthus – Biomass Resource Amaranthus – Food Production ◦Agricultural seed ◦Environmentally tolerant and adaptable Amaranthus – Energy Production ◦Plant cellulose and monosaccharides ◦Lignocellulosic ethanol Amaranthus – Potential Economic Impact ◦Sustainable Supplement to grain production

Research Objective Hypothesis ◦Amaranthus is a viable biomass resource for lignocellulosic ethanol production in comparison with plant resources under evaluation. Objectives ◦Determine biochemical carbohydrate properties of Amaranthus cell wall ◦ Compare Amaranthus to other plants proposed as biomass resources in lignocellulosic ethanol production ◦Improve Amaranthus biomass model with the inclusion of cell wall biochemical properties

Experimental Information Plants ◦Amaranthus cruentus – DB98246 ◦Amaranthus hypochondriacus – PI Plots ◦Single row (each plant) – 20 ft long, 5 ft apart Biochemical Analysis ◦Plant – Stem diameter and height, and mass ◦ Cell Wall – Cellulose, lignin, monosaccharides Data Statistical Analysis ◦ Mean Comparison – Anova ◦Covariance Comparison – Correlation

Summary Amaranthus Plants ◦Stem and Leaf measurements – No significant difference ◦Plant dry and cell wall mass – No significant difference ◦Cellulose and lignin – No significant difference ◦Xylose – A. hypochondricus > A. cruentus Biomass Plant Comparison ◦Cellulose – No significant difference ◦Lignin – M. sinesis > switchgrass > Amaranthus ◦Glucose – Maize > M. sinesis, switchgrass, Amaranthus ◦ Xylose – Switchgrass > M. sinesis, Maize > Amaranthus ◦Galactose – Amaranthus > M. sinesis, Maize, switchgrass Correlation – Plant measurement to mass

Conclusions Amaranthus Plants ◦No significant difference ◦Xylose content Biomass resource ◦Amaranthus comparable to other resources Cellulose – Equivalent content Lignin – Less content Monosaccharide – Equivalent to Maize stover

Additional Research Amaranthus ◦Analyze cell wall biochemical properties at 16 wks ◦Evaluate results for correlations ◦Evaluate data fit into biomass model