Data/hora: 21/06/2024 11:22:32

Biblioteca(s): 	Embrapa Florestas.	
Data corrente: 	05/07/2022	
Data da última atualização: 	05/07/2022	
Autoria: 	MICHELON, T. B.; SANTOS, F. S. dos; BELNIAKI, A. C.; VIEIRA, E. S. N.; PANOBIANCO, M.	
Afiliação: 	THOMAS BRUNO MICHELON, Universidade Federal do Paraná; FELIPE SERRATO DOS SANTOS, Universidade Federal do Paraná; ANDREZA CERIONI BELNIAKI, Universidade Federal do Paraná; ELISA SERRA NEGRA VIEIRA, CNPF; MARISTELA PANOBIANCO, Universidade Federal do Paraná.	
Título: 	Time reduction to evaluate Pinus taeda seeds germination by time-to-event analysis.	
Ano de publicação: 	2022	
Fonte/Imprenta: 	Scientia Agricola, v. 79, n. 6, e20210092, 2022.	
DOI: 	https://doi.org/10.1590/1678-992X-2021-0092	
Idioma: 	Português	
Conteúdo: 	ABSTRACT: The species Pinus taeda is largely used in intensive silviculture worldwide. This species has propagation through seeds, which requires determining seeds viability for their commercialization. The germination test recommended for this species usually requires up to 63 days to provide results on the quality of freshly harvested seeds, delaying commercialization and favoring contamination during the conduction of the test. The authors of this study aimed to establish the developmental stages of P. taeda seedlings to determine a criterion for interpreting the germination test with greater speed and efficiency to obtain results. The seeds were sown in transparent plastic boxes on two sheets of blotting paper and placed in a germinator at 22 °C with constant lighting. Five morphological stages of seedling development were defined with daily counts of the number of normal seedlings for each criterion, distribution in time, and the accumulated percentage of normal seedlings adjusted to time-to-event nonlinear regression. The new interpretation criterion proposed in this study is efficient, and P. taeda seedlings can be considered normal when cotyledon leaves differ by approximately 3 mm between the integument and hypocotyl, reducing the time to conduct the germination test by up to ten days compared to the criterion usually used in the routine analysis of seed laboratories.	
Palavras-Chave: 	Desenvolvimento das plântulas; Nonlinear regression; Physiological quality; Qualidade fisiológica; Regressão não linear; Seedling development stages; Viabilidade.	
Thesaurus Nal: 	Pinaceae; Viability.	
Categoria do assunto: 	K Ciência Florestal e Produtos de Origem Vegetal	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1144470/1/ScientiaAgricola-2022PinusTaedaSeedsGermination.pdf	
Registro original: 	Embrapa Florestas (CNPF)	
Exemplares: 	CNPF - (58312-1) - UPC - AP - DD -  -  -  - DIS