Cross-tolerance mechanism induction in melon seeds by priming prior drying
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/11796 |
Resumo: | The loss of benefits after re-drying is one of the drawbacks of the seed priming technique. Different types of stresses have been used before re-drying to preserve the priming benefits. This process may be seen as promoting cross tolerance to increase the defense mechanisms that prevent loss of viability in seeds primed after drying. We tested the effect of some stresses to induce cross-tolerance and different drying conditions with the aim of maintaining priming benefits in melon seeds. The seeds were primed in an aerated KNO3 solution (0.35M), -1.7MPa, 25 °C, in the dark for six days. The primed seeds were then submitted to slow drying, fast drying, cold shock + slow drying, cold shock + fast drying, heat shock + slow drying, heat shock + fast drying, PEG + slow drying, PEG + fast drying, ABA + slow drying, ABA + fast drying and no drying (planted directly after priming). We evaluated antioxidant enzyme activities (SOD, CAT and APX), germinability, mean time of germination (MTG) and mean rate of germination (MRG). A completely randomized design was used with three repetitions of 50 seeds in each treatment. Data were analyzed by ANOVA and means were compared by the Scott-Knott test (p ≤ 0.05). ABA increased SOD activity after drying and CAT activity was reduced by priming. APX activity was not observed. The stress submission prior to re-drying improved the MRG and reduced MTG. Therefore, the induction of the cross-tolerance mechanism could be effective to maintain priming benefits in melon seeds. |
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Cross-tolerance mechanism induction in melon seeds by priming prior dryingIndução do mechanismo de tolerância cruzada em sementes de melão osmoticamente condicionadas antes da secagemMelão – Sementes – ViabilidadeSementes – Armazenamento – TestesEstatística agrícolaMelons – Seeds – ViabilitySeeds – Storage – TestingAgriculture - Statistical methodsThe loss of benefits after re-drying is one of the drawbacks of the seed priming technique. Different types of stresses have been used before re-drying to preserve the priming benefits. This process may be seen as promoting cross tolerance to increase the defense mechanisms that prevent loss of viability in seeds primed after drying. We tested the effect of some stresses to induce cross-tolerance and different drying conditions with the aim of maintaining priming benefits in melon seeds. The seeds were primed in an aerated KNO3 solution (0.35M), -1.7MPa, 25 °C, in the dark for six days. The primed seeds were then submitted to slow drying, fast drying, cold shock + slow drying, cold shock + fast drying, heat shock + slow drying, heat shock + fast drying, PEG + slow drying, PEG + fast drying, ABA + slow drying, ABA + fast drying and no drying (planted directly after priming). We evaluated antioxidant enzyme activities (SOD, CAT and APX), germinability, mean time of germination (MTG) and mean rate of germination (MRG). A completely randomized design was used with three repetitions of 50 seeds in each treatment. Data were analyzed by ANOVA and means were compared by the Scott-Knott test (p ≤ 0.05). ABA increased SOD activity after drying and CAT activity was reduced by priming. APX activity was not observed. The stress submission prior to re-drying improved the MRG and reduced MTG. Therefore, the induction of the cross-tolerance mechanism could be effective to maintain priming benefits in melon seeds.A perda dos benefícios do condicionamento, após a ressecagem, é um dos problemas do condicionamento. Para conservar os benefícios, têm sido utilizados diferentes estresses antes da secagem. Esse processo poderia agir como tolerância cruzada, aumentando os mecanismos de defesa, prevenindo a perda de viabilidade em sementes condicionadas após a secagem. Assim, testou-se o efeito de estresses, na tentativa de induzir tolerância cruzada, após diferentes secagens, mantendo os benefícios do condicionamento em sementes de melão. Dessa forma, as sementes foram condicionadas em solução aerada de KNO3 (0,35M), -1,7 MPa, 25 °C, no escuro, por seis dias. Depois disso, foram submetidas à secagem lenta, rápida, choque de frio + secagem lenta e rápida, choque de calor + secagem lenta e rápida, PEG + secagem lenta e rápida, ABA + secagem lenta e rápida e sementes sem secagem. As sementes não condicionadas foram o controle. Foi avaliada a atividade das enzimas SOD, CAT e APX, germinabilidade, tempo médio de germinação e taxa média de germinação. O delineamento experimental utilizado foi inteiramente casualisado (DIC) com três repetições, contendo 50 sementes para cada tratamento. Para a análise estatística dos dados, foi utilizado ANOVA e as médias comparadas pelo teste de Scott-Knott (p ≤ 0,05). A aplicação de ABA aumentou a atividade da SOD após a secagem e o condicionamento reduziu a atividade da CAT. O estresse inicial, antes da secagem, aumentou- a e reduziu o tempo médio de germinação. Contudo, a indução do mecanismo de tolerância cruzada pode ser efetiva na manutenção dos benefícios do condicionamento.Universidade Federal de Lavras2016-09-21T20:23:48Z2016-09-21T20:23:48Z2014-10-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfLIRA, J. M. S. et al. Cross-tolerance mechanism induction in melon seeds by priming prior drying. Ciência e Agrotecnologia, Lavras, v. 39, n. 2, p. 131-137, Mar./Apr. 2015.http://repositorio.ufla.br/jspui/handle/1/11796Ciência e Agrotecnologiareponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLALira, Jean Marcel SousaLara, Túlio SilvaRodrigues, Amanda CristianeDousseau, SaraMagalhães, Marcelo MuradAlvarenga, Amauri Alves deinfo:eu-repo/semantics/openAccesseng2016-09-21T20:23:48Zoai:localhost:1/11796Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2016-09-21T20:23:48Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
Cross-tolerance mechanism induction in melon seeds by priming prior drying Indução do mechanismo de tolerância cruzada em sementes de melão osmoticamente condicionadas antes da secagem |
title |
Cross-tolerance mechanism induction in melon seeds by priming prior drying |
spellingShingle |
Cross-tolerance mechanism induction in melon seeds by priming prior drying Lira, Jean Marcel Sousa Melão – Sementes – Viabilidade Sementes – Armazenamento – Testes Estatística agrícola Melons – Seeds – Viability Seeds – Storage – Testing Agriculture - Statistical methods |
title_short |
Cross-tolerance mechanism induction in melon seeds by priming prior drying |
title_full |
Cross-tolerance mechanism induction in melon seeds by priming prior drying |
title_fullStr |
Cross-tolerance mechanism induction in melon seeds by priming prior drying |
title_full_unstemmed |
Cross-tolerance mechanism induction in melon seeds by priming prior drying |
title_sort |
Cross-tolerance mechanism induction in melon seeds by priming prior drying |
author |
Lira, Jean Marcel Sousa |
author_facet |
Lira, Jean Marcel Sousa Lara, Túlio Silva Rodrigues, Amanda Cristiane Dousseau, Sara Magalhães, Marcelo Murad Alvarenga, Amauri Alves de |
author_role |
author |
author2 |
Lara, Túlio Silva Rodrigues, Amanda Cristiane Dousseau, Sara Magalhães, Marcelo Murad Alvarenga, Amauri Alves de |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Lira, Jean Marcel Sousa Lara, Túlio Silva Rodrigues, Amanda Cristiane Dousseau, Sara Magalhães, Marcelo Murad Alvarenga, Amauri Alves de |
dc.subject.por.fl_str_mv |
Melão – Sementes – Viabilidade Sementes – Armazenamento – Testes Estatística agrícola Melons – Seeds – Viability Seeds – Storage – Testing Agriculture - Statistical methods |
topic |
Melão – Sementes – Viabilidade Sementes – Armazenamento – Testes Estatística agrícola Melons – Seeds – Viability Seeds – Storage – Testing Agriculture - Statistical methods |
description |
The loss of benefits after re-drying is one of the drawbacks of the seed priming technique. Different types of stresses have been used before re-drying to preserve the priming benefits. This process may be seen as promoting cross tolerance to increase the defense mechanisms that prevent loss of viability in seeds primed after drying. We tested the effect of some stresses to induce cross-tolerance and different drying conditions with the aim of maintaining priming benefits in melon seeds. The seeds were primed in an aerated KNO3 solution (0.35M), -1.7MPa, 25 °C, in the dark for six days. The primed seeds were then submitted to slow drying, fast drying, cold shock + slow drying, cold shock + fast drying, heat shock + slow drying, heat shock + fast drying, PEG + slow drying, PEG + fast drying, ABA + slow drying, ABA + fast drying and no drying (planted directly after priming). We evaluated antioxidant enzyme activities (SOD, CAT and APX), germinability, mean time of germination (MTG) and mean rate of germination (MRG). A completely randomized design was used with three repetitions of 50 seeds in each treatment. Data were analyzed by ANOVA and means were compared by the Scott-Knott test (p ≤ 0.05). ABA increased SOD activity after drying and CAT activity was reduced by priming. APX activity was not observed. The stress submission prior to re-drying improved the MRG and reduced MTG. Therefore, the induction of the cross-tolerance mechanism could be effective to maintain priming benefits in melon seeds. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-10-15 2016-09-21T20:23:48Z 2016-09-21T20:23:48Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
LIRA, J. M. S. et al. Cross-tolerance mechanism induction in melon seeds by priming prior drying. Ciência e Agrotecnologia, Lavras, v. 39, n. 2, p. 131-137, Mar./Apr. 2015. http://repositorio.ufla.br/jspui/handle/1/11796 |
identifier_str_mv |
LIRA, J. M. S. et al. Cross-tolerance mechanism induction in melon seeds by priming prior drying. Ciência e Agrotecnologia, Lavras, v. 39, n. 2, p. 131-137, Mar./Apr. 2015. |
url |
http://repositorio.ufla.br/jspui/handle/1/11796 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Lavras |
publisher.none.fl_str_mv |
Universidade Federal de Lavras |
dc.source.none.fl_str_mv |
Ciência e Agrotecnologia reponame:Repositório Institucional da UFLA instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Repositório Institucional da UFLA |
collection |
Repositório Institucional da UFLA |
repository.name.fl_str_mv |
Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
_version_ |
1807835064440979456 |