Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2017-04-04T12:33:17Z No. of bitstreams: 1 2016 - V?vian Palheta da Rocha 2016.pdf: 925358 bytes, checksum: 56f81d180a908791a6be805b35fee76f (MD5) / Made available in DSpace on 2017-04-04T12:33:17Z (GMT). No. of bitstreams: 1 2016 - V?vian Palheta da Rocha 2016.pdf: 925358 bytes, checksum: 56f81d180a908791a6be805b35fee76f (MD5) Previous issue date: 2016-03-14 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The crambe (Crambe abyssinicaHochst) has been cultivated because of its potential in the production of oil in its seeds, as fodder plant, among other uses. For this species, the high oil content affects the storage potential of seeds and associated with factors such as the pericarp, low availability of water in the soil can provide uneven germination. So, to reduce the nega-tive effects of the factors thatinterfere with crambe seed germination, it can be through the use of priming techniques. The objective of this research was to evaluate the efficiency of priming techniques in physiological quality of crambe seeds stored under controlled condi-tions. Therefore, the experiment was conducted in 2015 to 2016 period for crambe, classified seeds were used, treated, packed in paper bags krafts. After zero, three and six months of stor-age, the seeds were submitted to physiological primingtechniques, using the unmonitored hydration techniques (immersion in water), matriosmopriming with PEG 6000 -0.2 MPa, moist atmosphere and matripriming. Unconditioned seeds were used as control. The seeds were evaluated after drying by germination and vigor (first count, seedling performance, seedling emergence and electrical conductivity). From the results it can be concluded that the seeds subjected to matriosmoprimingand matriprimingpresent approximately 40% water content after 8 hours of imbibition. There was favoring the germination of seeds and dry mass of lot 1 after they have been submitted to matriosmoprimingat 0, three and six months. There was an increase of germination rate of seeds lot 3 which were submitted to matriprimingthe three and six months of storage. / O crambe (Crambe abyssinica Hochst) tem sido cultivado devido ao seu potencial na produ??o de ?leo em suas sementes e, como planta forrageira, entre outros usos. Para esta esp?cie, o alto teor de ?leo prejudica o potencial de armazenamento de suas sementes, assim como o uso de sementes com a presen?a do pericarpo do fruto no momento da semeadura ea baixa dispo-nibilidade de ?gua no solo podem proporcionar germina??o desuniforme. Para reduzir os efeitos negativos dos fatores que interferem no desempenho de sementes de crambe, pode ser em-pregado o condicionamento fisiol?gico das sementes. Assim, o objetivo desta pesquisa foi avaliar a efici?ncia de diferentes t?cnicas de condicionamento fisiol?gico na qualidade fisio-l?gica das sementes de crambe armazenadas em condi??es controladas. Para tanto, o experi-mento foi realizado no per?odo de 2015 a 2016. Sementes classificadas, tratadas e acondicio-nadas em sacos de papel foram avaliadas ap?s zero, tr?s e seis meses de armazenamento. As sementes foram submetidas ?s t?cnicas de hidrata??o n?o monitorada (imers?o em ?gua), matriosmocondicionamento com PEG 6000 a -0,2 MPa, atmosfera ?mida e matricondicionamento. Sementes n?o condicionadas foram utilizadas como controle. As sementes foram avaliadas ap?s secagem pelos testes de germina??o e vigor (primeira contagem, desempenho de pl?ntulas, emerg?ncia de pl?ntulas e condutividade el?trica). Pelos resultados, pode-se concluir que as sementes submetidas ao matriosmocondicionamento e ao matricondicionamento apresen-tam em torno de 40% de teor de ?gua ap?s 8 horas de embebi??o. Houve favorecimento da germina??o das sementes e da massa seca das pl?ntulas do lote 1 ap?s terem sido submetidas ao matriosmocondicionamento, aos zero , tr?s e seis meses. O matricondicionamento favoreceu a velocidade de germina??o das sementes do lote 3, aos tr?s e seis meses de armazenamento.

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2016-08-31T18:29:21Z No. of bitstreams: 1 2011 - Ludmila Fonseca da Silva.pdf: 418709 bytes, checksum: 3fdbea46dfe13f8e8414fea7b84fbd88 (MD5) / Made available in DSpace on 2016-08-31T18:29:21Z (GMT). No. of bitstreams: 1 2011 - Ludmila Fonseca da Silva.pdf: 418709 bytes, checksum: 3fdbea46dfe13f8e8414fea7b84fbd88 (MD5) Previous issue date: 2011-02-25 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / Two experiments were installed. The first experiment was conducted to evaluate the physiological quality of sunflower seeds after hydration by the methods of humid atmosphere and soak substrate combined to 10 and 20?C to increase the water content of seeds for 15, 20 and 25%. For this, the initial physiological quality and after the moistening of the seeds was determined by germination tests and vigor. The second experiment was conducted to evaluate the precocity of the primary root emission of sunflower seeds as a vigor test. For this, four seed lots were tested for germination and vigor, among them, the primary root emission aiming percentage of emission and precocity index. From the results it was concluded that the method of soak substrate at 10?C to increase the water content at 15 and 20% was positive for moistening the seeds of high quality, although it has seen little reduction in seedling vigor. The test root emission after 48 hours was effective in classifying different levels of vigor lots of sunflower seeds / Foram instalados dois experimentos. O primeiro foi realizado com o objetivo de avaliar a qualidade fisiol?gica das sementes de girassol ap?s a hidrata??o pelos m?todos da atmosfera ?mida e substrato ?mido combinados a 10 e 20?C para elevar o teor de ?gua das sementes para 15, 20 e 25%. Para isto, a qualidade fisiol?gica inicial e ap?s o umedecimento das sementes foi determinada pelos testes de germina??o e de vigor. O segundo experimento foi realizado com o objetivo de avaliar a precocidade da emiss?o de raiz prim?ria de sementes de girassol como teste de vigor. Para isto, quatro lotes de sementes foram submetidos a testes de germina??o e vigor, entre eles, o de emiss?o de raiz prim?ria, visando a porcentagem de emiss?o e o ?ndice de precocidade. Pelos resultados foi poss?vel concluir que o m?todo do substrato ?mido a 10?C visando aumentar o teor de ?gua a 15 e 20% foi favor?vel para o umedecimento das sementes de elevada qualidade, embora tenha sido observado pequena redu??o do vigor das pl?ntulas. O teste de emiss?o de raiz prim?ria ap?s 48 horas foi eficiente na classifica??o de distintos n?veis de vigor dos lotes de sementes de girassol.