title: Approximate Entropy as a measure of complexity in sap flow temporal dynamics of two tropical tree species under water deficit.
abstract: Approximate Entropy (ApEn), a model-independent statistics to quantify serial irregularities, was used to evaluate changes in sap flow temporal dynamics of two tropical species of trees subjected to water deficit. Water deficit induced a decrease in sap flow of G. ulmifolia, whereas C. legalis held stable their sap flow levels. Slight increases in time series complexity were observed in both species under drought condition. This study showed that ApEn could be used as a helpful tool to assess slight changes in temporal dynamics of physiological data, and to uncover some patterns of plant physiological responses to environmental stimuli.
authors.affiliation: Laboratório de Plantas Cultivadas sob Estresse, Departamento de Ciências Biológicas, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, SP, 13418-900, Brasil. gmaia@universiabrasil.net
authors.forename: Gustavo M
authors.initials: GM
authors.lastname: Souza
authors.forename: Rafael V
authors.initials: RV
authors.lastname: Ribeiro
authors.forename: Mauro G
authors.initials: MG
authors.lastname: Santos
authors.forename: Henrique L
authors.initials: HL
authors.lastname: Ribeiro
authors.forename: Ricardo F
authors.initials: RF
authors.lastname: Oliveira
mesh_terms: D001692:Biological Transport; D019277:Entropy; D018521:Plant Physiological Phenomena; D013057:Spectrum Analysis; D014197:Trees / Q000378:metabolism*; D014867:Water / Q000378:metabolism*
chemical_list: D014867:Water