Water stress and accelerated aging effects on the viability of osmoconditioned Chorisia speciosa seeds
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/6604 |
Resumo: | The objective of this work was to evaluate the efficiency of osmotic conditioning on the tolerance increase of seeds of Chorisia speciosa St. Hil. to water stress and accelerated aging. The seeds previously scarified (punction) were primed in KNO3 (0.1M) solutions at 20oC during 24 hours. After that, the seeds were dried (at 27oC) until the initial moisture level, presented before the pre-imbibition, was reached. Primed and non primed seeds were exposed to water stress simulated with PEG 6000 solutions, with 0.0, -0.1, -0.2, -0.3, -0.4, -0.5, -0.6 and -0.7 MPa of osmotic potentials and to accelerated aging at 45oC and 100% of RU during 0, 24, 48, 72, 96 and 120 hours. The mean values of rate and germination percentage were higher in primed seed than in non primed ones. The tolerance limit to water stress was extended for primed seed. Primed seeds were more sensible to accelerated aging. |
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Water stress and accelerated aging effects on the viability of osmoconditioned Chorisia speciosa seedsEfeito do estresse hídrico e envelhecimento precoce na viabilidade de sementes osmocondicionadas de paineira (Chorisia speciosa)seed treatment; seed vigour; germinability; osmotic pressuretratamento de semente; vigor de semente; capacidade germinativa; pressão osmóticaThe objective of this work was to evaluate the efficiency of osmotic conditioning on the tolerance increase of seeds of Chorisia speciosa St. Hil. to water stress and accelerated aging. The seeds previously scarified (punction) were primed in KNO3 (0.1M) solutions at 20oC during 24 hours. After that, the seeds were dried (at 27oC) until the initial moisture level, presented before the pre-imbibition, was reached. Primed and non primed seeds were exposed to water stress simulated with PEG 6000 solutions, with 0.0, -0.1, -0.2, -0.3, -0.4, -0.5, -0.6 and -0.7 MPa of osmotic potentials and to accelerated aging at 45oC and 100% of RU during 0, 24, 48, 72, 96 and 120 hours. The mean values of rate and germination percentage were higher in primed seed than in non primed ones. The tolerance limit to water stress was extended for primed seed. Primed seeds were more sensible to accelerated aging.O objetivo deste trabalho foi avaliar a eficiência do condicionamento osmótico em aumentar a tolerância de sementes de paineira (Chorisia speciosa St. Hil.) ao estresse hídrico e ao envelhecimento precoce. As sementes foram condicionadas em solução de KNO3 (0,1M) a 20oC durante 24 horas, e desidratadas a 27oC até atingirem o peso inicial, apresentado antes do tratamento. Em seguida, foram expostas ao estresse hídrico simulado com soluções de PEG 6000 nos potenciais osmóticos de 0,0, -0,1, -0,2, -0,3, -0,4, -0,5, -0,6 e -0,7 MPa e aos efeitos do envelhecimento precoce (45oC e 100% UR) durante 0, 24, 48, 72, 96 e 120 horas. Nas sementes condicionadas e submetidas ao estresse hídrico, os valores médios de porcentagem e velocidade de germinação foram estatisticamente superiores aos obtidos em sementes não condicionadas. Além disso, o condicionamento osmótico aumentou o limite máximo de tolerância ao estresse hídrico. As sementes condicionadas foram mais sensíveis ao envelhecimento precoce.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraFanti, Silmara CristinaPerez, Sonia Cristina Juliano Gualtieri de Andrade2003-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/6604Pesquisa Agropecuaria Brasileira; v.38, n.4, abr. 2003; 537-543Pesquisa Agropecuária Brasileira; v.38, n.4, abr. 2003; 537-5431678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/6604/3661info:eu-repo/semantics/openAccess2010-08-17T17:15:45Zoai:ojs.seer.sct.embrapa.br:article/6604Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2010-08-17T17:15:45Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Water stress and accelerated aging effects on the viability of osmoconditioned Chorisia speciosa seeds Efeito do estresse hídrico e envelhecimento precoce na viabilidade de sementes osmocondicionadas de paineira (Chorisia speciosa) |
title |
Water stress and accelerated aging effects on the viability of osmoconditioned Chorisia speciosa seeds |
spellingShingle |
Water stress and accelerated aging effects on the viability of osmoconditioned Chorisia speciosa seeds Fanti, Silmara Cristina seed treatment; seed vigour; germinability; osmotic pressure tratamento de semente; vigor de semente; capacidade germinativa; pressão osmótica |
title_short |
Water stress and accelerated aging effects on the viability of osmoconditioned Chorisia speciosa seeds |
title_full |
Water stress and accelerated aging effects on the viability of osmoconditioned Chorisia speciosa seeds |
title_fullStr |
Water stress and accelerated aging effects on the viability of osmoconditioned Chorisia speciosa seeds |
title_full_unstemmed |
Water stress and accelerated aging effects on the viability of osmoconditioned Chorisia speciosa seeds |
title_sort |
Water stress and accelerated aging effects on the viability of osmoconditioned Chorisia speciosa seeds |
author |
Fanti, Silmara Cristina |
author_facet |
Fanti, Silmara Cristina Perez, Sonia Cristina Juliano Gualtieri de Andrade |
author_role |
author |
author2 |
Perez, Sonia Cristina Juliano Gualtieri de Andrade |
author2_role |
author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Fanti, Silmara Cristina Perez, Sonia Cristina Juliano Gualtieri de Andrade |
dc.subject.por.fl_str_mv |
seed treatment; seed vigour; germinability; osmotic pressure tratamento de semente; vigor de semente; capacidade germinativa; pressão osmótica |
topic |
seed treatment; seed vigour; germinability; osmotic pressure tratamento de semente; vigor de semente; capacidade germinativa; pressão osmótica |
description |
The objective of this work was to evaluate the efficiency of osmotic conditioning on the tolerance increase of seeds of Chorisia speciosa St. Hil. to water stress and accelerated aging. The seeds previously scarified (punction) were primed in KNO3 (0.1M) solutions at 20oC during 24 hours. After that, the seeds were dried (at 27oC) until the initial moisture level, presented before the pre-imbibition, was reached. Primed and non primed seeds were exposed to water stress simulated with PEG 6000 solutions, with 0.0, -0.1, -0.2, -0.3, -0.4, -0.5, -0.6 and -0.7 MPa of osmotic potentials and to accelerated aging at 45oC and 100% of RU during 0, 24, 48, 72, 96 and 120 hours. The mean values of rate and germination percentage were higher in primed seed than in non primed ones. The tolerance limit to water stress was extended for primed seed. Primed seeds were more sensible to accelerated aging. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-04-01 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/6604 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/6604 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/6604/3661 |
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 |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.38, n.4, abr. 2003; 537-543 Pesquisa Agropecuária Brasileira; v.38, n.4, abr. 2003; 537-543 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416677704073216 |