Atividade respiratória como método alternativo na diferenciação do vigor de lotes de sementes

Detalhes bibliográficos
Ano de defesa: 2008
Autor(a) principal: Mendes, Cristina Rodrigues
Orientador(a): Moraes, Dario Munt de
Banca de defesa: Não Informado pela instituição
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Pelotas
Programa de Pós-Graduação: Programa de Pós-Graduação em Fisiologia Vegetal
Departamento: Biologia
País: BR
Palavras-chave em Português:
Palavras-chave em Inglês:
Área do conhecimento CNPq:
Link de acesso: http://guaiaca.ufpel.edu.br/handle/123456789/2014
Resumo: New methods in assessing the physiological quality are a necessity in programmes of seeds quality control. Th us, this study aimed to describe and analyze the efficiency of the method of Pettenkofer in determining th e respiratory activity for the differentiation of seeds lots on its vigor. Three lots of soy bean seeds cv. 8000 and rice cv. IRGA 422C L were used. Besides the determination of respiratory activity , the following tests were conducted as reference: degree of humidity, germination, first count of germination, electrical conductivity , seedlings emergence, length of the shoot and root, and total dry mass. The results of reference tests and respiratory activity of seeds allow ed the classification of lots at differe nt levels of phy siological q uality . The timing of soaking and permanence of soy bean and ric e, in the eq uipment of Pettenkofer w as enough to provide the distinction o f lots. According to the results, it appears that lots of high vigor show more respirato ry activity than the low er vigor. Th e determination of respiratory activity , for the meth od of Pettenk ofer, is efficient, q uick and useful as alternative test in th e differe ntiation of vigor of lots, of soy bean cv. 8000 and rice. cv. IRGA 422C L.