02143naa a2200289 a 450000100080000000500110000800800410001910000140006024501340007426000090020852013160021765300170153365300160155065300260156665300150159265300130160770000170162070000160163770000180165370000140167170000180168570000200170370000190172370000130174270000150175577300830177011315142021-11-24       2021    bl uuuu     u00u1 u    #d1 aSOUZA, M.  aExploratory and discriminant analysis of plant phenolic profiles obtained by UV?vis scanning spectroscopy.h[electronic resource]  c2021  aSome species of cover crops produce phenolic compounds with allelopathic potential. The use of math, statistical and computational tools to analyze data obtained with spectrophotometry can assist in the chemical profle discrimination to choose which species and cultivation are the best for weed management purposes. The aim of this study was to perform exploratory and discriminant analysis using R package specmineonthephenolicprofleofSecalecerealeL.,AvenastrigosaL.andRaphanussativusL.shootsobtained by UV?vis scanning spectrophotometry. Plants were collected at 60, 80 and 100 days after sowing and at 15 and 30 days after rolling in experiment in Brazil. Exploratory and discriminant analysis, namely principal component analysis, hierarchical clustering analysis, t-test, fold-change, analysis of variance and supervised machine learning analysis were performed. Results showed a stronger tendency to cluster phenolic profles according to plant species rather than crop management system, period of sampling or plant phenologic stage. PCA analysis showed a strong distinction of S. cereale L. and A. strigosa L. 30 days after rolling. Due to the fast analysis and friendly use, the R package specmine can be recommended as a supporting tool to exploratory and discriminatory analysis of multivariate data.  achemometrics  acover crops  amultivariate analysis  aR language  aspecmine1 aCOMIN, J. J.1 aMORESCO, R.1 aMARASCHIN, M.1 aKURTZ, C.1 aLOVATO, P. E.1 aLOURENZI, C. R.1 aPILATTI, F. K.1 aLOSS, A.1 aKUHNEN, S.  tJournal of Integrative Bioinformatics, Berlin, Alemanhagv. 18, p. 1-11, 2021.