Development of rice seedlings grown from pre-hydrated seeds and irradiated with gamma rays
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Ciência e Agrotecnologia (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600008 |
Resumo: | Techniques used to induce mutations, such as ionizing radiation, are an effective tool in increasing genetic variability in breeding programs of species of economic interest. This study aimed to evaluate the effect of different doses of Co60 gamma radiation on previously soaked seeds on the emergence and early growth of seedlings of two rice cultivars. To do this, seeds (25% moisture) of BRS Querência and BRS Fronteira were irradiated with zero (control), 50, 100, 150 and 200 Gy, and then sown in trays containing soil and kept in a greenhouse. The results showed that gamma radiation affected seedling development, where the highest dose tested (200 Gy) significantly reduced the emergence and the index of emergence speed. Growth parameters were reduced greater reduction in cv. BRS Querência. For antioxidant enzymes, superoxide dismutase expressed little variation for the periods evaluated. Already ascorbate peroxidase and catalase showed a significant increase in horsepower cv. BRS Fronteira at 14 DAS, followed by an increase in both cultivars ascorbate peroxidase activity at 28 DAS. The highest antioxidant capacity observed in cv. BRS Fronteira conferred greater tolerance to stress caused by gamma radiation. |
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Development of rice seedlings grown from pre-hydrated seeds and irradiated with gamma raysOryza sativa Lhumiditygenetic variabilityTechniques used to induce mutations, such as ionizing radiation, are an effective tool in increasing genetic variability in breeding programs of species of economic interest. This study aimed to evaluate the effect of different doses of Co60 gamma radiation on previously soaked seeds on the emergence and early growth of seedlings of two rice cultivars. To do this, seeds (25% moisture) of BRS Querência and BRS Fronteira were irradiated with zero (control), 50, 100, 150 and 200 Gy, and then sown in trays containing soil and kept in a greenhouse. The results showed that gamma radiation affected seedling development, where the highest dose tested (200 Gy) significantly reduced the emergence and the index of emergence speed. Growth parameters were reduced greater reduction in cv. BRS Querência. For antioxidant enzymes, superoxide dismutase expressed little variation for the periods evaluated. Already ascorbate peroxidase and catalase showed a significant increase in horsepower cv. BRS Fronteira at 14 DAS, followed by an increase in both cultivars ascorbate peroxidase activity at 28 DAS. The highest antioxidant capacity observed in cv. BRS Fronteira conferred greater tolerance to stress caused by gamma radiation.Editora da UFLA2011-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600008Ciência e Agrotecnologia v.35 n.6 2011reponame:Ciência e Agrotecnologia (Online)instname:Universidade Federal de Lavras (UFLA)instacron:UFLA10.1590/S1413-70542011000600008info:eu-repo/semantics/openAccessSilva,Aline Scheer daDanielowski,RodrigoBraga,Eugenia Jacira BolacelDeuner,SidneiMagalhães Junior,Ariano Martins dePeters,Jose Antonioeng2012-01-13T00:00:00Zoai:scielo:S1413-70542011000600008Revistahttp://www.scielo.br/cagroPUBhttps://old.scielo.br/oai/scielo-oai.php||renpaiva@dbi.ufla.br|| editora@editora.ufla.br1981-18291413-7054opendoar:2022-11-22T16:31:10.092580Ciência e Agrotecnologia (Online) - Universidade Federal de Lavras (UFLA)true |
dc.title.none.fl_str_mv |
Development of rice seedlings grown from pre-hydrated seeds and irradiated with gamma rays |
title |
Development of rice seedlings grown from pre-hydrated seeds and irradiated with gamma rays |
spellingShingle |
Development of rice seedlings grown from pre-hydrated seeds and irradiated with gamma rays Silva,Aline Scheer da Oryza sativa L humidity genetic variability |
title_short |
Development of rice seedlings grown from pre-hydrated seeds and irradiated with gamma rays |
title_full |
Development of rice seedlings grown from pre-hydrated seeds and irradiated with gamma rays |
title_fullStr |
Development of rice seedlings grown from pre-hydrated seeds and irradiated with gamma rays |
title_full_unstemmed |
Development of rice seedlings grown from pre-hydrated seeds and irradiated with gamma rays |
title_sort |
Development of rice seedlings grown from pre-hydrated seeds and irradiated with gamma rays |
author |
Silva,Aline Scheer da |
author_facet |
Silva,Aline Scheer da Danielowski,Rodrigo Braga,Eugenia Jacira Bolacel Deuner,Sidnei Magalhães Junior,Ariano Martins de Peters,Jose Antonio |
author_role |
author |
author2 |
Danielowski,Rodrigo Braga,Eugenia Jacira Bolacel Deuner,Sidnei Magalhães Junior,Ariano Martins de Peters,Jose Antonio |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Silva,Aline Scheer da Danielowski,Rodrigo Braga,Eugenia Jacira Bolacel Deuner,Sidnei Magalhães Junior,Ariano Martins de Peters,Jose Antonio |
dc.subject.por.fl_str_mv |
Oryza sativa L humidity genetic variability |
topic |
Oryza sativa L humidity genetic variability |
description |
Techniques used to induce mutations, such as ionizing radiation, are an effective tool in increasing genetic variability in breeding programs of species of economic interest. This study aimed to evaluate the effect of different doses of Co60 gamma radiation on previously soaked seeds on the emergence and early growth of seedlings of two rice cultivars. To do this, seeds (25% moisture) of BRS Querência and BRS Fronteira were irradiated with zero (control), 50, 100, 150 and 200 Gy, and then sown in trays containing soil and kept in a greenhouse. The results showed that gamma radiation affected seedling development, where the highest dose tested (200 Gy) significantly reduced the emergence and the index of emergence speed. Growth parameters were reduced greater reduction in cv. BRS Querência. For antioxidant enzymes, superoxide dismutase expressed little variation for the periods evaluated. Already ascorbate peroxidase and catalase showed a significant increase in horsepower cv. BRS Fronteira at 14 DAS, followed by an increase in both cultivars ascorbate peroxidase activity at 28 DAS. The highest antioxidant capacity observed in cv. BRS Fronteira conferred greater tolerance to stress caused by gamma radiation. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-12-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600008 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600008 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1413-70542011000600008 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Editora da UFLA |
publisher.none.fl_str_mv |
Editora da UFLA |
dc.source.none.fl_str_mv |
Ciência e Agrotecnologia v.35 n.6 2011 reponame:Ciência e Agrotecnologia (Online) instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Ciência e Agrotecnologia (Online) |
collection |
Ciência e Agrotecnologia (Online) |
repository.name.fl_str_mv |
Ciência e Agrotecnologia (Online) - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
||renpaiva@dbi.ufla.br|| editora@editora.ufla.br |
_version_ |
1799874968746459136 |