Data/hora: 23/09/2024 12:41:54

Biblioteca(s): 	Embrapa Acre; Embrapa Agroindústria Tropical.	
Data corrente: 	14/06/2021	
Data da última atualização: 	20/09/2021	
Autoria: 	SILVA, A. L. D. da; ALVES FILHO, E. G.; SILVA, L. M. A. e; TAVARES, O. C. H.; PEREIRA, M. G.; CAMPOS, T. de; SILVA, L. M. da.	
Afiliação: 	ANDRÉ LUCAS DOMINGOS DA SILVA, State Secretariat for Education, Culture and Sport, Rio Branco, AC; ELENILSON G. ALVES FILHO, Universidade Federal do Ceará; LORENA MARA ALEXANDRE E SILVA, CNPAT; ORLANDO CARLOS HUERTAS TAVARES, Federal Rural University of Rio de Janeiro (UFRRJ); MARCOS GERVASIO PEREIRA, Federal Rural University of Rio de Janeiro (UFRRJ); TATIANA DE CAMPOS, CPAF-AC; LUCIELIO MANOEL DA SILVA, CPAF-AC.	
Título: 	Near infrared spectroscopy to rapid assess the rubber tree clone and the influence of maturation and disease at the leaves.	
Ano de publicação: 	2021	
Fonte/Imprenta: 	Microchemical Journal, v. 168, 106478, Sept. 2021.	
DOI: 	https://doi.org/10.1016/j.microc.2021.106478	
Idioma: 	Inglês	
Conteúdo: 	The rubber tree is a species of great economic importance due to its natural rubber, which is widely used in the tire industry due to its resistance and does not yet have a synthetic formula capable of completely replacing it. Near infrared spectroscopy (NIRS) is an emerging technique for soil and plant analysis. The aim of this study is to predict the Hevea rubber tree clones, detect and discriminate leaves at different stages of development (young or adult), as well as to discriminate healthy and affected adult leaves by South American Leaf Blight, through the spectroscopic technique of visible to infrared (Vis-NIR) combined with chemometrics. Using dried ground leaves samples, leaves from 14 rubber trees clones (H. brasiliensis) were evaluated, these leaves were collected in 3 tree stages young trees; adult or mature trees; and mature trees with symptoms of Microcyclus ulei (disease leaves). The near infrared (NIR) reflectance spectra were acquired using a spectrometer FOSS-NIRS (model DS2500). An average of 64 scans operating in a range between 400 and 2500 nm under spectral resolution of 0.5 nm were used for all the spectral acquisitions. With the use of reflectance spectroscopy in visible and near infrared, it was possible to efficiently discriminate the clones of the rubber tree, regardless of the use of spectra obtained from young leaves or from mature leaves. Which might enable studies with characterization of the genetic materials present in the germplasm banks and in situ. The technique also efficiently differentiated the young leaves from the mature leaves, as well as separating the healthy mature leaves from the diseased mature leaves. These results can contribute to the breeding and conservation programs of the species, obtaining fast results and without the use of chemical reagents.	
Palavras-Chave: 	Análisis de multivarianza; Enfermedades fungales de las plantas; Espectroscopia no infravermelho próximo; Hojas; Marchitez foliar; Near infrared spectroscopy; Rubber tree.	
Thesagro: 	Análise Estatística; Análise Foliar; Clone; Doença Fúngica; Hevea Brasiliensis; Mal das Folhas; Microcyclus Ulei; Seringueira.	
Thesaurus Nal: 	Fungal diseases of plants; Leaf blight; Leaves; Multivariate analysis.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
Registro original: 	Embrapa Agroindústria Tropical (CNPAT)	
Exemplares: 	CPAF-AC - (27142-1) - UPC - AP - DD -  -  -  - DIS
CNPAT - (16712-1) - UPC - AP - DD -  -  - ART21052 - DIS