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Cell-type-dependent enzymatic hydrolysis of palm residues: chemical and surface characterization of fibers and parenchyma cells

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Abstract

Chemical and surface characteristics of sulfite-pretreated royal palm sheath (RPS) fibers and parenchyma cells were investigated in order to study cell-type-dependent biomass hydrolysis by cellulase. Size, chemical composition, cellulose crystallinity and the exposure of cellulose microfibrils in pretreated RPS biomass affected the enzymatic accessibility and digestibility of different cell-type substrates.

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Acknowledgments

We thank the support of Fundamental Research Funds for the Central Universities (No. 2012ZB0020) and National Natural Science Foundation of China (No. 31170549).

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Authors and Affiliations

  1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China

    Ning Li, Hao Liu & Shiyu Fu

  2. Department of Microbiology and Molecular Genetics, Michigan State University, 6154 Biomedical and Physical Sciences Building, East Lansing, 48824, MI, USA

    Shicheng Chen

Authors
  1. Ning Li
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  2. Hao Liu
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  3. Shiyu Fu
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  4. Shicheng Chen
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Corresponding author

Correspondence to Hao Liu.

Electronic supplementary material

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10529_2012_1079_MOESM1_ESM.tif

Supplementary Figure 1: AFM phase images of alkali sulfite RPS fibers (a), alkali sulfite RPS fines (b), delignified alkali sulfite fibers (c)and delignified alkali sulfite fines (d), recorded at a scan rate of 1 Hz and a scan size of 2 × 2 μm2 (TIFF 4137 kb)

10529_2012_1079_MOESM2_ESM.tif

Supplementary Figure 2: X-ray diffraction patterns and the crystallinity indices of RPS biomass.Note: Biomass crystallinity index (CI) was calculated from the height ratio between the intensity of the crystalline peak(I002 − Iam) and total intensity (I002) (1959). I002 refers to the peak intensity for the crystalline portion of biomass at about2θ = 22.5° and Iam represents the intensity for the amorphous portion at about 18°. Cellulose crystallinity index (CrIc)11 was predicted using O’Dwyer’s empirical equation, CrIc = 1.097 (CrIb) + 0.939 (Xylan content) − 11.433 (TIFF 577 kb)

Supplementary Table 1 (DOCX 16 kb)

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Li, N., Liu, H., Fu, S. et al. Cell-type-dependent enzymatic hydrolysis of palm residues: chemical and surface characterization of fibers and parenchyma cells. Biotechnol Lett 35, 213–218 (2013). https://doi.org/10.1007/s10529-012-1079-0

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  • DOI: https://doi.org/10.1007/s10529-012-1079-0

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