Dormência e pré-germinação de sementes de arroz

Detalhes bibliográficos
Autor(a) principal: Franzin, Simone Medianeira
Data de Publicação: 2006
Tipo de documento: Tese
Idioma: por
Título da fonte: Manancial - Repositório Digital da UFSM
dARK ID: ark:/26339/001300000cxpd
Texto Completo: http://repositorio.ufsm.br/handle/1/3156
Resumo: Several causes are pointed as responsible for the numbness in seeds of rice. The fenolic compounds have influence in the swinging between promoters and inhibitors of the germination of seeds, could represent an obstacle to the diffusion of gases. Several treatments are used with the purpose of overcoming the dormence in seeds and alternative methods appear to try to solve this problem, as the ultrasound radiations. That technique, for being little used in seeds, however, it presents optimization difficulty, as well as the lack of specific knowledge about the action of the radiation promoted by the ultrasonic waves in living tissues. The objective of the work was to evaluate the chemical effects produced by the ultrasound about the overcoming of the dormence and physiologic quality of seeds of rice. Seeds of irrigated rice cv. IRGA 417 and of drier cv. Spring, submitted to the exhibition of the ultrasonic waves by periods of 5, 10, 15 and 20 minutes and temperatures of 20, 30 and 40 oC. The variables analyzed after each treatment were: germination, first counting and index of germination speed. The results indicated that there was variation in the answers of the culture to the treatments, and the best results were found in the highest temperatures. It was concluded that the ultrasound radiations affect the quality of the seeds of rice, being a promising method for the overcoming of the dormence, still needing her standardization.
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spelling Dormência e pré-germinação de sementes de arrozRadiations of ultrasound to overcome the dormence in seeds of riceOryza sativa L.SonicaçãoQualidade de sementesSonicationQuality of seedsCNPQ::CIENCIAS AGRARIAS::AGRONOMIASeveral causes are pointed as responsible for the numbness in seeds of rice. The fenolic compounds have influence in the swinging between promoters and inhibitors of the germination of seeds, could represent an obstacle to the diffusion of gases. Several treatments are used with the purpose of overcoming the dormence in seeds and alternative methods appear to try to solve this problem, as the ultrasound radiations. That technique, for being little used in seeds, however, it presents optimization difficulty, as well as the lack of specific knowledge about the action of the radiation promoted by the ultrasonic waves in living tissues. The objective of the work was to evaluate the chemical effects produced by the ultrasound about the overcoming of the dormence and physiologic quality of seeds of rice. Seeds of irrigated rice cv. IRGA 417 and of drier cv. Spring, submitted to the exhibition of the ultrasonic waves by periods of 5, 10, 15 and 20 minutes and temperatures of 20, 30 and 40 oC. The variables analyzed after each treatment were: germination, first counting and index of germination speed. The results indicated that there was variation in the answers of the culture to the treatments, and the best results were found in the highest temperatures. It was concluded that the ultrasound radiations affect the quality of the seeds of rice, being a promising method for the overcoming of the dormence, still needing her standardization.Inúmeras causas são apontadas como responsáveis pela dormência em sementes de arroz. Os compostos fenólicos destacam-se por interferirem no balanço entre promotores e inibidores da germinação de sementes, podendo representar um obstáculo à difusão de gases. Vários tratamentos são utilizados com a finalidade de superar a dormência em sementes e, portanto, surgem métodos alternativos para sua superação, como as radiações de ultra-som. Essa técnica, por ser pouco utilizada em sementes, no entanto, apresenta dificuldade de otimização, bem como a falta de conhecimento específico sobre o efeito da radiação promovida pelas ondas ultra-sônicas em tecidos vivos. O objetivo do trabalho foi avaliar os efeitos sonoquímicos produzidos pelo ultra-som sobre a superação da dormência e qualidade fisiológica de sementes de arroz. Utilizaram-se sementes de arroz irrigado cv. IRGA 417 e de sequeiro cv. Primavera, submetidas à exposição das ondas ultra-sônicas por períodos de 5, 10, 15 e 20 minutos e temperaturas de 20, 30 e 40 oC. As variáveis analisadas após cada tratamento foram: germinação, primeira contagem e índice de velocidade de germinação. Os resultados indicaram que houve variação nas respostas das cultivares aos tratamentos, sendo que os melhores resultados foram encontrados nas temperaturas mais elevadas. Concluiu-se que as radiações de ultra-som afetam a qualidade das sementes de arroz, sendo um método promissor para a superação da dormência, necessitando ainda sua padronização.Universidade Federal de Santa MariaBRAgronomiaUFSMPrograma de Pós-Graduação em AgronomiaMenezes, Nilson Lemos dehttp://lattes.cnpq.br/0551755093817460Muniz, Marlove Fátima Briãohttp://lattes.cnpq.br/3148312031889388Garcia, Danton Camachohttp://lattes.cnpq.br/5188663655820823Tillmann, Maria Angela Andréhttp://lattes.cnpq.br/8628922515034362Roversi, Teresinhahttp://lattes.cnpq.br/5344931027610780Franzin, Simone Medianeira2006-05-182006-05-182006-03-20info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisapplication/pdfapplication/pdfFRANZIN, Simone Medianeira. Radiations of ultrasound to overcome the dormence in seeds of rice. 2006. 122 f. Tese (Doutorado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2006.http://repositorio.ufsm.br/handle/1/3156ark:/26339/001300000cxpdporinfo:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM2022-03-14T11:29:59Zoai:repositorio.ufsm.br:1/3156Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2022-03-14T11:29:59Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false
dc.title.none.fl_str_mv Dormência e pré-germinação de sementes de arroz
Radiations of ultrasound to overcome the dormence in seeds of rice
title Dormência e pré-germinação de sementes de arroz
spellingShingle Dormência e pré-germinação de sementes de arroz
Franzin, Simone Medianeira
Oryza sativa L.
Sonicação
Qualidade de sementes
Sonication
Quality of seeds
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA
title_short Dormência e pré-germinação de sementes de arroz
title_full Dormência e pré-germinação de sementes de arroz
title_fullStr Dormência e pré-germinação de sementes de arroz
title_full_unstemmed Dormência e pré-germinação de sementes de arroz
title_sort Dormência e pré-germinação de sementes de arroz
author Franzin, Simone Medianeira
author_facet Franzin, Simone Medianeira
author_role author
dc.contributor.none.fl_str_mv Menezes, Nilson Lemos de
http://lattes.cnpq.br/0551755093817460
Muniz, Marlove Fátima Brião
http://lattes.cnpq.br/3148312031889388
Garcia, Danton Camacho
http://lattes.cnpq.br/5188663655820823
Tillmann, Maria Angela André
http://lattes.cnpq.br/8628922515034362
Roversi, Teresinha
http://lattes.cnpq.br/5344931027610780
dc.contributor.author.fl_str_mv Franzin, Simone Medianeira
dc.subject.por.fl_str_mv Oryza sativa L.
Sonicação
Qualidade de sementes
Sonication
Quality of seeds
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA
topic Oryza sativa L.
Sonicação
Qualidade de sementes
Sonication
Quality of seeds
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA
description Several causes are pointed as responsible for the numbness in seeds of rice. The fenolic compounds have influence in the swinging between promoters and inhibitors of the germination of seeds, could represent an obstacle to the diffusion of gases. Several treatments are used with the purpose of overcoming the dormence in seeds and alternative methods appear to try to solve this problem, as the ultrasound radiations. That technique, for being little used in seeds, however, it presents optimization difficulty, as well as the lack of specific knowledge about the action of the radiation promoted by the ultrasonic waves in living tissues. The objective of the work was to evaluate the chemical effects produced by the ultrasound about the overcoming of the dormence and physiologic quality of seeds of rice. Seeds of irrigated rice cv. IRGA 417 and of drier cv. Spring, submitted to the exhibition of the ultrasonic waves by periods of 5, 10, 15 and 20 minutes and temperatures of 20, 30 and 40 oC. The variables analyzed after each treatment were: germination, first counting and index of germination speed. The results indicated that there was variation in the answers of the culture to the treatments, and the best results were found in the highest temperatures. It was concluded that the ultrasound radiations affect the quality of the seeds of rice, being a promising method for the overcoming of the dormence, still needing her standardization.
publishDate 2006
dc.date.none.fl_str_mv 2006-05-18
2006-05-18
2006-03-20
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/doctoralThesis
format doctoralThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv FRANZIN, Simone Medianeira. Radiations of ultrasound to overcome the dormence in seeds of rice. 2006. 122 f. Tese (Doutorado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2006.
http://repositorio.ufsm.br/handle/1/3156
dc.identifier.dark.fl_str_mv ark:/26339/001300000cxpd
identifier_str_mv FRANZIN, Simone Medianeira. Radiations of ultrasound to overcome the dormence in seeds of rice. 2006. 122 f. Tese (Doutorado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2006.
ark:/26339/001300000cxpd
url http://repositorio.ufsm.br/handle/1/3156
dc.language.iso.fl_str_mv por
language por
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Santa Maria
BR
Agronomia
UFSM
Programa de Pós-Graduação em Agronomia
publisher.none.fl_str_mv Universidade Federal de Santa Maria
BR
Agronomia
UFSM
Programa de Pós-Graduação em Agronomia
dc.source.none.fl_str_mv reponame:Manancial - Repositório Digital da UFSM
instname:Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
instname_str Universidade Federal de Santa Maria (UFSM)
instacron_str UFSM
institution UFSM
reponame_str Manancial - Repositório Digital da UFSM
collection Manancial - Repositório Digital da UFSM
repository.name.fl_str_mv Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)
repository.mail.fl_str_mv atendimento.sib@ufsm.br||tedebc@gmail.com
_version_ 1815172324207362048