Irrigation and Light Access Effects on Coffea arabica L. Leaves by FTIR-Chemometric Analysis
AUTOR(ES)
Sanchez, Patrícia M., Pauli, Elis D., Scheel, Guilherme L., Rakocevic, Miroslava, Bruns, Roy E., Scarminio, Ieda S.
FONTE
J. Braz. Chem. Soc.
DATA DE PUBLICAÇÃO
2018-01
RESUMO
Coffee bean chemical compositions has been extensively studied. However, there is a small amount of research on other parts of the coffee plant, including leaves. Fourier transform infrared (FTIR) spectral profiles of Coffea arabica L. cv. IAPAR 59 leaf extracts from a simplex-centroid design were studied by principal component analysis (PCA) to evaluate the effect of solvent extractor on its metabolites. PCA indicated that the extractor solvents containing ethanol were the most suitable for this study. FTIR spectra in conjunction with orthogonal signal correction and partial least squares-discrimination analysis (OSC-PLS-DA) were used to classify and discriminate the leaves of irrigated and non-irrigated plants by bands related to carbohydrates, amino acids and lipids. Leaves receiving different intensities of solar radiation were also discriminated by bands corresponding to caffeine, carbohydrates and lipids. FTIR spectral profile analyzed with chemometric tools showed to be a useful, powerful and simple procedure to discriminate coffee leaves collected from different microclimate conditions.
Documentos Relacionados
- Anatomical and physiological plasticity of leaves of Coffea arabica L. in response to irradiance
- Integrated Chemometric Approach to Optimize Sample Preparation for Detecting Metabolic Changes Provoked by Abiotic Stress in Coffea arabica L. Leaf Fingerprints
- Aspects histopathology, epidemiology and control of blister spot on Coffea arabica L.
- Induction of anther calli and embryogenesis in Coffea arabica L.
- Caracterização morfoagronômica de acessos de Coffea arabica L