Condicionamento osmótico e desempenho de sementes de repolho com diferentes níveis de vigor

Detalhes bibliográficos
Autor(a) principal: Armondes, Kássia de Assis Pereira
Data de Publicação: 2013
Tipo de documento: Dissertação
Idioma: por
Título da fonte: LOCUS Repositório Institucional da UFV
Texto Completo: http://locus.ufv.br/handle/123456789/4604
Resumo: The performance of the seeds after sowing is mainly determined by its physiological and sanitary quality that ensures adequate plant establishment in the field. Priming, used as pre-sowing treatment, has been recommended as an alternative to increase seed germination and also to provide more rapid and uniform emergence, especially for vegetable seeds. Therefore, we evaluated the effect of priming on the performance of cabbage seeds with different levels of vigor. The experiment was conducted at Seed Laboratory of the Department of Plant Science at Federal University of Viçosa. Seeds of four lots of cabbage cultivar "60 days", with different levels of vigor were used. The seeds of each lot were primed in aerated polyethylene glycol 6000 at -1.0 MPa potential for periods of 2, 4 and 6 days at 20 º C. The seeds of each treatment were subjected to germination test, calculating the index of germination speed and germination rate by counting the germinated seeds from the first day until five days after sowing, and the germination value was obtained after ten days after sowing. The percentage of seedling emergence, the rate of emergence speed and emergence rate were assessed by a germination test in trays containing sand in a greenhouse. For assessing seed vigor was performed accelerated aging test and the length of hypocotyl and radicle and seedling dry mass were measured. It was concluded that priming is effective to improve the germination and vigor of cabbage seeds, mainly when seed imbibition was done in aerated PEG-6000 -1.0 MPa for a period of six days. Positive effects of priming on germination and vigor were more evident in seed lots with low vigor. Seed drying after priming may decrease the beneficial effects of priming on cabbage seeds.
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spelling Armondes, Kássia de Assis Pereirahttp://lattes.cnpq.br/4007194340639738Dias, Denise Cunha Fernandes dos Santoshttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4727304Z9Dias, Luiz Antonio dos Santoshttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4763137P6Brasileiro, Beatriz Gonçalveshttp://lattes.cnpq.br/8060901148976333Fonseca, Maira Christina Marqueshttp://lattes.cnpq.br/95415691361512912015-03-26T13:39:58Z2013-09-092015-03-26T13:39:58Z2013-03-21ARMONDES, Kássia de Assis Pereira. Osmotic priming and performance of cabbage seeds with different levels of vigor. 2013. 38 f. Dissertação (Mestrado em Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de) - Universidade Federal de Viçosa, Viçosa, 2013.http://locus.ufv.br/handle/123456789/4604The performance of the seeds after sowing is mainly determined by its physiological and sanitary quality that ensures adequate plant establishment in the field. Priming, used as pre-sowing treatment, has been recommended as an alternative to increase seed germination and also to provide more rapid and uniform emergence, especially for vegetable seeds. Therefore, we evaluated the effect of priming on the performance of cabbage seeds with different levels of vigor. The experiment was conducted at Seed Laboratory of the Department of Plant Science at Federal University of Viçosa. Seeds of four lots of cabbage cultivar "60 days", with different levels of vigor were used. The seeds of each lot were primed in aerated polyethylene glycol 6000 at -1.0 MPa potential for periods of 2, 4 and 6 days at 20 º C. The seeds of each treatment were subjected to germination test, calculating the index of germination speed and germination rate by counting the germinated seeds from the first day until five days after sowing, and the germination value was obtained after ten days after sowing. The percentage of seedling emergence, the rate of emergence speed and emergence rate were assessed by a germination test in trays containing sand in a greenhouse. For assessing seed vigor was performed accelerated aging test and the length of hypocotyl and radicle and seedling dry mass were measured. It was concluded that priming is effective to improve the germination and vigor of cabbage seeds, mainly when seed imbibition was done in aerated PEG-6000 -1.0 MPa for a period of six days. Positive effects of priming on germination and vigor were more evident in seed lots with low vigor. Seed drying after priming may decrease the beneficial effects of priming on cabbage seeds.O desempenho das sementes após a semeadura é determinado principalmente pela sua qualidade fisiológica e sanitária que garante um adequado estabelecimento das plantas em campo. O condicionamento osmótico, usado como tratamento présemeadura, vem sendo indicado como alternativa para aumentar a germinação das sementes e também para proporcionar emergência mais rápida e uniforme, especialmente de hortaliças. Portanto, avaliou-se o efeito do condicionamento osmótico sobre o desempenho de sementes de repolho com diferentes níveis de vigor. O experimento foi realizado no Laboratório de Sementes do Departamento de Fitotecnia da Universidade Federal de Viçosa. Foram utilizadas sementes de quatro lotes repolho, cultivar 60 dias , com diferentes níveis de qualidade fisiológica. As sementes de cada lote foram condicionadas em solução aerada de polietileno glicol 6000 no potencial -1,0 MPa pelos períodos de 2, 4 e 6 dias a 20º C. As sementes de cada tratamento foram submetidas ao teste de germinação calculando-se a primeira contagem de germinação aos cinco dias após semeadura, a germinação final aos dez dias após a semeadura, o índice de velocidade de germinação e a velocidade de germinação. Avaliou-se também a porcentagem de emergência de plântulas, o índice de velocidade de emergência (IVE) e a velocidade de emergência, em bandejas contendo areia em casa de vegetação. Ainda para avaliar o vigor das sementes, foi realizado o teste de envelhecimento acelerado, o comprimento de hipocótilo e radícula e a massa seca das plântulas. Concluiu-se que o osmocondicionamento é eficiente para melhorar a germinação e o vigor das sementes de repolho, principalmente quando se utiliza a embebição das sementes em solução aerada de PEG-6000 a -1,0 MPa, pelo período de seis dias. Efeitos positivos do condicionamento osmótico na germinação e vigor das sementes foram mais evidentes em lotes de menor qualidade fisiológica. A secagem das sementes após o condicionamento osmótico pode diminuir os efeitos benéficos do osmocondicionamento em sementes de repolho.application/pdfporUniversidade Federal de ViçosaMestrado em FitotecniaUFVBRPlantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita deCondicionamento osmóticoRepolhoOsmotic primingCabbageCNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIACondicionamento osmótico e desempenho de sementes de repolho com diferentes níveis de vigorOsmotic priming and performance of cabbage seeds with different levels of vigorinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFVORIGINALtexto completo.pdfapplication/pdf731287https://locus.ufv.br//bitstream/123456789/4604/1/texto%20completo.pdf8b9af9645937d82cbccc86c4a0358cf2MD51TEXTtexto completo.pdf.txttexto completo.pdf.txtExtracted texttext/plain67713https://locus.ufv.br//bitstream/123456789/4604/2/texto%20completo.pdf.txt9da304b736f83ac5fb53f55c7c7bdc38MD52THUMBNAILtexto completo.pdf.jpgtexto completo.pdf.jpgIM Thumbnailimage/jpeg3582https://locus.ufv.br//bitstream/123456789/4604/3/texto%20completo.pdf.jpg2b6a87093c8a0bf980d945c67a6c642cMD53123456789/46042016-04-10 23:09:42.552oai:locus.ufv.br:123456789/4604Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452016-04-11T02:09:42LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false
dc.title.por.fl_str_mv Condicionamento osmótico e desempenho de sementes de repolho com diferentes níveis de vigor
dc.title.alternative.eng.fl_str_mv Osmotic priming and performance of cabbage seeds with different levels of vigor
title Condicionamento osmótico e desempenho de sementes de repolho com diferentes níveis de vigor
spellingShingle Condicionamento osmótico e desempenho de sementes de repolho com diferentes níveis de vigor
Armondes, Kássia de Assis Pereira
Condicionamento osmótico
Repolho
Osmotic priming
Cabbage
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA
title_short Condicionamento osmótico e desempenho de sementes de repolho com diferentes níveis de vigor
title_full Condicionamento osmótico e desempenho de sementes de repolho com diferentes níveis de vigor
title_fullStr Condicionamento osmótico e desempenho de sementes de repolho com diferentes níveis de vigor
title_full_unstemmed Condicionamento osmótico e desempenho de sementes de repolho com diferentes níveis de vigor
title_sort Condicionamento osmótico e desempenho de sementes de repolho com diferentes níveis de vigor
author Armondes, Kássia de Assis Pereira
author_facet Armondes, Kássia de Assis Pereira
author_role author
dc.contributor.authorLattes.por.fl_str_mv http://lattes.cnpq.br/4007194340639738
dc.contributor.author.fl_str_mv Armondes, Kássia de Assis Pereira
dc.contributor.advisor1.fl_str_mv Dias, Denise Cunha Fernandes dos Santos
dc.contributor.advisor1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4727304Z9
dc.contributor.referee1.fl_str_mv Dias, Luiz Antonio dos Santos
dc.contributor.referee1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4763137P6
dc.contributor.referee2.fl_str_mv Brasileiro, Beatriz Gonçalves
dc.contributor.referee2Lattes.fl_str_mv http://lattes.cnpq.br/8060901148976333
dc.contributor.referee3.fl_str_mv Fonseca, Maira Christina Marques
dc.contributor.referee3Lattes.fl_str_mv http://lattes.cnpq.br/9541569136151291
contributor_str_mv Dias, Denise Cunha Fernandes dos Santos
Dias, Luiz Antonio dos Santos
Brasileiro, Beatriz Gonçalves
Fonseca, Maira Christina Marques
dc.subject.por.fl_str_mv Condicionamento osmótico
Repolho
topic Condicionamento osmótico
Repolho
Osmotic priming
Cabbage
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA
dc.subject.eng.fl_str_mv Osmotic priming
Cabbage
dc.subject.cnpq.fl_str_mv CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA
description The performance of the seeds after sowing is mainly determined by its physiological and sanitary quality that ensures adequate plant establishment in the field. Priming, used as pre-sowing treatment, has been recommended as an alternative to increase seed germination and also to provide more rapid and uniform emergence, especially for vegetable seeds. Therefore, we evaluated the effect of priming on the performance of cabbage seeds with different levels of vigor. The experiment was conducted at Seed Laboratory of the Department of Plant Science at Federal University of Viçosa. Seeds of four lots of cabbage cultivar "60 days", with different levels of vigor were used. The seeds of each lot were primed in aerated polyethylene glycol 6000 at -1.0 MPa potential for periods of 2, 4 and 6 days at 20 º C. The seeds of each treatment were subjected to germination test, calculating the index of germination speed and germination rate by counting the germinated seeds from the first day until five days after sowing, and the germination value was obtained after ten days after sowing. The percentage of seedling emergence, the rate of emergence speed and emergence rate were assessed by a germination test in trays containing sand in a greenhouse. For assessing seed vigor was performed accelerated aging test and the length of hypocotyl and radicle and seedling dry mass were measured. It was concluded that priming is effective to improve the germination and vigor of cabbage seeds, mainly when seed imbibition was done in aerated PEG-6000 -1.0 MPa for a period of six days. Positive effects of priming on germination and vigor were more evident in seed lots with low vigor. Seed drying after priming may decrease the beneficial effects of priming on cabbage seeds.
publishDate 2013
dc.date.available.fl_str_mv 2013-09-09
2015-03-26T13:39:58Z
dc.date.issued.fl_str_mv 2013-03-21
dc.date.accessioned.fl_str_mv 2015-03-26T13:39:58Z
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dc.identifier.citation.fl_str_mv ARMONDES, Kássia de Assis Pereira. Osmotic priming and performance of cabbage seeds with different levels of vigor. 2013. 38 f. Dissertação (Mestrado em Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de) - Universidade Federal de Viçosa, Viçosa, 2013.
dc.identifier.uri.fl_str_mv http://locus.ufv.br/handle/123456789/4604
identifier_str_mv ARMONDES, Kássia de Assis Pereira. Osmotic priming and performance of cabbage seeds with different levels of vigor. 2013. 38 f. Dissertação (Mestrado em Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de) - Universidade Federal de Viçosa, Viçosa, 2013.
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