Germination and development of jatropha seedlings under water stress conditions
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Semina. Ciências Agrárias (Online) |
Texto Completo: | https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/5224 |
Resumo: | The first step sequence that involves the germination process is imbibition. The limitation of water to the seed at planting time can reduce germination and velocty as well as the development of the seedling. Hence, the objective of this study was to evaluate the germination and seedling development of jatropha under conditions of water stress by polyethylene glycol (PEG6000). The study was conducted at the Research Laboratory of the Department of Crop Seeds, Federal University of Viçosa. We used seeds of jatropha in temperature de 30 °C under osmotic potential levels of 0.0, -0.2, -0.4, -0.6, -0.8, -1.0 and -1.2. The performance of seed germination and seedling development were evaluated by germination (first and second count), index of germination velocity, time of germination, length and primary root and hypocotyl length. The experimental design was completely randomized design with six levels of osmotic potential to more witnesses and four replications. We conducted the analysis of variance and regression of the data and curves fitted by quadratic polynomial model for all variables. The reduction in osmotic potential of the substrate caused a significant reduction in germination of seeds of jatropha, as well as the speed of germination and seedling performance of this species. The fall of germination and seedling performance is enhanced and levels considered critical to -0.2 MPa and inhibits germination from -1.2 MPa. |
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Semina. Ciências Agrárias (Online) |
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Germination and development of jatropha seedlings under water stress conditionsGerminação e desenvolvimento de plântulas de pinhão manso sob condições de estresse hídrico simuladoJatropha curcasSalinitySeedsVigor.Jatropha curcasSalinidadeSementesVigor.The first step sequence that involves the germination process is imbibition. The limitation of water to the seed at planting time can reduce germination and velocty as well as the development of the seedling. Hence, the objective of this study was to evaluate the germination and seedling development of jatropha under conditions of water stress by polyethylene glycol (PEG6000). The study was conducted at the Research Laboratory of the Department of Crop Seeds, Federal University of Viçosa. We used seeds of jatropha in temperature de 30 °C under osmotic potential levels of 0.0, -0.2, -0.4, -0.6, -0.8, -1.0 and -1.2. The performance of seed germination and seedling development were evaluated by germination (first and second count), index of germination velocity, time of germination, length and primary root and hypocotyl length. The experimental design was completely randomized design with six levels of osmotic potential to more witnesses and four replications. We conducted the analysis of variance and regression of the data and curves fitted by quadratic polynomial model for all variables. The reduction in osmotic potential of the substrate caused a significant reduction in germination of seeds of jatropha, as well as the speed of germination and seedling performance of this species. The fall of germination and seedling performance is enhanced and levels considered critical to -0.2 MPa and inhibits germination from -1.2 MPa.A primeira etapa da seqüência que envolve o processo germinativo é a embebição. A limitação de água para a semente no momento da semeadura pode diminuir a germinação e sua velocidade, bem como o desenvolvimento da plântula. Diante disto, o objetivo deste trabalho foi avaliar o desempenho germinativo e o desenvolvimento de plântulas de pinhão manso sob condições de estresse hídrico simulado por polietilenoglicol (PEG6000). O trabalho foi desenvolvido no Laboratório de Pesquisa em Sementes do Departamento de Fitotecnia da Universidade Federal de Viçosa. Utilizaram-se sementes de pinhão manso em temperatura de 30ºC sob os níveis de potencial osmótico de 0,0; -0,2; -0,4; -0,6; -0,8; -1,0 e -1,2. O desempenho germinativo das sementes e o desenvolvimento das plântulas foram avaliados pelos testes de germinação (primeira e segunda contagem), Índice de velocidade de germinação, tempo médio de germinação, comprimento de raiz primária e comprimento do hipocótilo. O delineamento estatístico utilizado foi o inteiramente casualizado com seis níveis de potencial osmótico mais a testemunha com quatro repetições. A redução do potencial osmótico do substrato reduziu expressivamente a germinação das sementes de pinhão manso, bem como a velocidade de germinação e o desempenho das plântulas. Maior redução da germinação e do desenvolvimento inicial das plântulas foi observado no potencial osmótico de -0,2MPa. A aprtir de-1,2MPa houve inibição da germinação.UEL2011-12-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAvaliado por paresPesquisa de laboratórioapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/522410.5433/1679-0359.2011v32n4Sup1p1837Semina: Ciências Agrárias; Vol. 32 No. 4Sup1 (2011); 1837-1842Semina: Ciências Agrárias; v. 32 n. 4Sup1 (2011); 1837-18421679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELporhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/5224/9144Pereira, Márcio DiasLopes, José Carlosinfo:eu-repo/semantics/openAccess2015-11-19T18:38:11Zoai:ojs.pkp.sfu.ca:article/5224Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2015-11-19T18:38:11Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false |
dc.title.none.fl_str_mv |
Germination and development of jatropha seedlings under water stress conditions Germinação e desenvolvimento de plântulas de pinhão manso sob condições de estresse hídrico simulado |
title |
Germination and development of jatropha seedlings under water stress conditions |
spellingShingle |
Germination and development of jatropha seedlings under water stress conditions Pereira, Márcio Dias Jatropha curcas Salinity Seeds Vigor. Jatropha curcas Salinidade Sementes Vigor. |
title_short |
Germination and development of jatropha seedlings under water stress conditions |
title_full |
Germination and development of jatropha seedlings under water stress conditions |
title_fullStr |
Germination and development of jatropha seedlings under water stress conditions |
title_full_unstemmed |
Germination and development of jatropha seedlings under water stress conditions |
title_sort |
Germination and development of jatropha seedlings under water stress conditions |
author |
Pereira, Márcio Dias |
author_facet |
Pereira, Márcio Dias Lopes, José Carlos |
author_role |
author |
author2 |
Lopes, José Carlos |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Pereira, Márcio Dias Lopes, José Carlos |
dc.subject.por.fl_str_mv |
Jatropha curcas Salinity Seeds Vigor. Jatropha curcas Salinidade Sementes Vigor. |
topic |
Jatropha curcas Salinity Seeds Vigor. Jatropha curcas Salinidade Sementes Vigor. |
description |
The first step sequence that involves the germination process is imbibition. The limitation of water to the seed at planting time can reduce germination and velocty as well as the development of the seedling. Hence, the objective of this study was to evaluate the germination and seedling development of jatropha under conditions of water stress by polyethylene glycol (PEG6000). The study was conducted at the Research Laboratory of the Department of Crop Seeds, Federal University of Viçosa. We used seeds of jatropha in temperature de 30 °C under osmotic potential levels of 0.0, -0.2, -0.4, -0.6, -0.8, -1.0 and -1.2. The performance of seed germination and seedling development were evaluated by germination (first and second count), index of germination velocity, time of germination, length and primary root and hypocotyl length. The experimental design was completely randomized design with six levels of osmotic potential to more witnesses and four replications. We conducted the analysis of variance and regression of the data and curves fitted by quadratic polynomial model for all variables. The reduction in osmotic potential of the substrate caused a significant reduction in germination of seeds of jatropha, as well as the speed of germination and seedling performance of this species. The fall of germination and seedling performance is enhanced and levels considered critical to -0.2 MPa and inhibits germination from -1.2 MPa. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-12-06 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Avaliado por pares Pesquisa de laboratório |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/5224 10.5433/1679-0359.2011v32n4Sup1p1837 |
url |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/5224 |
identifier_str_mv |
10.5433/1679-0359.2011v32n4Sup1p1837 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/5224/9144 |
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 |
UEL |
publisher.none.fl_str_mv |
UEL |
dc.source.none.fl_str_mv |
Semina: Ciências Agrárias; Vol. 32 No. 4Sup1 (2011); 1837-1842 Semina: Ciências Agrárias; v. 32 n. 4Sup1 (2011); 1837-1842 1679-0359 1676-546X reponame:Semina. Ciências Agrárias (Online) instname:Universidade Estadual de Londrina (UEL) instacron:UEL |
instname_str |
Universidade Estadual de Londrina (UEL) |
instacron_str |
UEL |
institution |
UEL |
reponame_str |
Semina. Ciências Agrárias (Online) |
collection |
Semina. Ciências Agrárias (Online) |
repository.name.fl_str_mv |
Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL) |
repository.mail.fl_str_mv |
semina.agrarias@uel.br |
_version_ |
1799306061914570752 |