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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Tissue-Specific Cell Wall Hydration in Sugarcane Stalks

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Autor(es):
Maziero, Priscila [1, 2] ; Jong, Jennifer [3] ; Mendes, Fernanda M. [1] ; Goncalves, Adilson R. [2] ; Eder, Michaela [4] ; Driemeier, Carlos [1]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] CTBE CNPEM, Lab Nacl Ciencia & Tecnol Bioetanol, BR-13083970 Campinas, SP - Brazil
[2] EEL USP, Dept Biotecnol, BR-12060281 Sao Paulo - Brazil
[3] Univ Calif Berkeley, Coll Nat Resources, Berkeley, CA 94720 - USA
[4] Max Planck Inst Colloids & Interfaces, Dept Biomat, D-14476 Potsdam - Germany
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: Journal of Agricultural and Food Chemistry; v. 61, n. 24, p. 5841-5847, JUN 19 2013.
Citações Web of Science: 10
Resumo

Plant cell walls contain water, especially under biological and wet processing conditions. The present work characterizes this water in tissues of sugarcane stalks. Environmental scanning electron microscopy shows tissue deformation upon drying. Dynamic vapor sorption determines the equilibrium and kinetics of moisture uptake. Thermoporometry by differential scanning calorimetry quantifies water in nanoscale pores. Results show that cell walls from top internodes of stalks are more deformable, slightly more sorptive to moisture, and substantially more porous. These differences of top internode are attributed to less lignified walls, which is confirmed by lower infrared spectral signal from aromatics. Furthermore, cell wall nanoscale porosity, an architectural and not directly compositional characteristic, is shown to be tissue-specific. Nanoscale porosities are ranked as follows: pith parenchyma > pith vascular bundles > rind. This ranking coincides with wall reactivity and digestibility in grasses, suggesting that nanoscale porosity is a major determinant of wall recalcitrance. (AU)

Processo FAPESP: 09/00874-5 - Estudos topoquímicos durante obtenção de etanol a partir de celulose de bagaço e palha de cana-de-açúcar
Beneficiário:Priscila Maziero
Linha de fomento: Bolsas no Brasil - Doutorado Direto
Processo FAPESP: 10/05523-3 - Alterações nanomorfológicas da matéria lignocelulósica de cana-de-açúcar
Beneficiário:Carlos Eduardo Driemeier
Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores