PHYSIOLOGICAL CHANGES DURING HYDRATION OF Dalbergia nigra ((VELL.) FR. ALL. EX BENTH.) SEEDS
Autor(a) principal: | |
---|---|
Data de Publicação: | 2016 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Ciência Florestal (Online) |
Texto Completo: | https://periodicos.ufsm.br/cienciaflorestal/article/view/22761 |
Resumo: | During germination, a series of sequential events occur in seeds in response to endogenous and / or exogenous factors. The objective of this study was to investigate the physiological changes resulting from the controlled hydration in water and temperature in seeds of jacaranda-da-bahia (Dalbergia nigra). To this end, two lots of seeds separated as high and low vigor were used in the tests. Seeds belonging to the two lots, after desinfect, were hydrated in water, with the method of humid atmosphere (relative humidity 95-99%) to reach four hydration levels: 10, 15, 20 and 25% moisture content in seeds, in temperatures (exogenous factor) of 15 and 25 ° C. After hydration and temperature treatments, were analyzed the following variables: curve soaking, germination percentage, germination speed index (GSI) and electrical conductivity. The results showed no significant difference in seeds physiological response between the temperatures. On the other hand, for hydration was found that up to 15% moisture content increased the seeds physiological quality of both lots, which showed higher germination values, IVG and smaller amounts of leached compounds. From 15% moisture content were found a reduction in the quality of seeds classified as high vigor, while those of low vigor continued to show positive responses in 20 and 25% humidity. Given this, it is concluded that the technique of controlled hydration in water favors the germination of Dalbergia nigra seeds, independent of the vigor. Hydration moisture content of 15% is more appropriate to increase the seeds quality. The hydration in values below or above resulted in a decrease in the stimulus. |
id |
UFSM-6_96589c308f97aa6307ce42b86829d64b |
---|---|
oai_identifier_str |
oai:ojs.pkp.sfu.ca:article/22761 |
network_acronym_str |
UFSM-6 |
network_name_str |
Ciência Florestal (Online) |
repository_id_str |
|
spelling |
PHYSIOLOGICAL CHANGES DURING HYDRATION OF Dalbergia nigra ((VELL.) FR. ALL. EX BENTH.) SEEDSALTERAÇÕES FISIOLÓGICAS DURANTE A HIDRATAÇÃO DE SEMENTES DE Dalbergia nigra ((VELL.) FR. ALL. EX BENTH.)imbibitionsgerminationforceDalbergia nigra.embebiçãogerminaçãovigorjacarandá-da-bahia.During germination, a series of sequential events occur in seeds in response to endogenous and / or exogenous factors. The objective of this study was to investigate the physiological changes resulting from the controlled hydration in water and temperature in seeds of jacaranda-da-bahia (Dalbergia nigra). To this end, two lots of seeds separated as high and low vigor were used in the tests. Seeds belonging to the two lots, after desinfect, were hydrated in water, with the method of humid atmosphere (relative humidity 95-99%) to reach four hydration levels: 10, 15, 20 and 25% moisture content in seeds, in temperatures (exogenous factor) of 15 and 25 ° C. After hydration and temperature treatments, were analyzed the following variables: curve soaking, germination percentage, germination speed index (GSI) and electrical conductivity. The results showed no significant difference in seeds physiological response between the temperatures. On the other hand, for hydration was found that up to 15% moisture content increased the seeds physiological quality of both lots, which showed higher germination values, IVG and smaller amounts of leached compounds. From 15% moisture content were found a reduction in the quality of seeds classified as high vigor, while those of low vigor continued to show positive responses in 20 and 25% humidity. Given this, it is concluded that the technique of controlled hydration in water favors the germination of Dalbergia nigra seeds, independent of the vigor. Hydration moisture content of 15% is more appropriate to increase the seeds quality. The hydration in values below or above resulted in a decrease in the stimulus.Durante a germinação, uma série de eventos sequenciais ocorre nas sementes em resposta a fatores endógenos e/ou exógenos às mesmas. O objetivo deste trabalho foi investigar as alterações fisiológicas decorrentes da hidratação controlada em água e da temperatura (fatores exógenos) em sementes de Dalbergia nigra (jacarandá-da-bahia). Para tanto, dois lotes de sementes, um de alto e um de baixo vigor foram utilizados nos ensaios. As sementes pertencentes aos dois lotes, após desinfestadas com Captan 0,5%, foram então hidratadas em água, pelo método da atmosfera úmida (umidade relativa de 95-99%), até atingirem quatro níveis de hidratação: 10, 15, 20 ou 25% de teor de água nas sementes, nas temperaturas de 15 e 25ºC. Após os tratamentos foram analisadas as seguintes variáveis: curva de embebição, percentagem de germinação, índice de velocidade (IVG) e condutividade elétrica. Os resultados mostraram que não houve diferença significativa na resposta fisiológica das sementes entre as temperaturas. Por outro lado, para a hidratação verificou-se que até 15% do teor de água aumentou a qualidade fisiológica das sementes de ambos os lotes, que apresentaram maiores valores de germinação, IVG e menores quantidades de compostos lixiviados. A partir de 15% de teor de água verificou-se redução na qualidade das sementes classificadas como de alto vigor, enquanto aquelas de baixo vigor continuaram apresentando respostas positivas em 20 e 25% de teor de água. Diante disto, conclui-se que a técnica de hidratação controlada em água favorece a germinação de sementes de Dalbergia nigra, independentemente do vigor das mesmas. A hidratação no teor de água de 15% é a mais indicada para incrementar a qualidade das sementes. A hidratação nos valores abaixo ou acima resultaram em redução no estímulo.Universidade Federal de Santa Maria2016-06-20info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/2276110.5902/1980509822761Ciência Florestal; Vol. 26 No. 2 (2016); 615-625Ciência Florestal; v. 26 n. 2 (2016); 615-6251980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMporhttps://periodicos.ufsm.br/cienciaflorestal/article/view/22761/pdfCopyright (c) 2016 Ciência Florestalinfo:eu-repo/semantics/openAccessAtaíde, Glauciana da MataBorges, Eduardo Euclydes de Lima eGonçalves, José Francisco de CarvalhoGuimarães, Valéria MontezeFlores, Andressa Vasconcelos2017-04-06T19:02:49Zoai:ojs.pkp.sfu.ca:article/22761Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2017-04-06T19:02:49Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
PHYSIOLOGICAL CHANGES DURING HYDRATION OF Dalbergia nigra ((VELL.) FR. ALL. EX BENTH.) SEEDS ALTERAÇÕES FISIOLÓGICAS DURANTE A HIDRATAÇÃO DE SEMENTES DE Dalbergia nigra ((VELL.) FR. ALL. EX BENTH.) |
title |
PHYSIOLOGICAL CHANGES DURING HYDRATION OF Dalbergia nigra ((VELL.) FR. ALL. EX BENTH.) SEEDS |
spellingShingle |
PHYSIOLOGICAL CHANGES DURING HYDRATION OF Dalbergia nigra ((VELL.) FR. ALL. EX BENTH.) SEEDS Ataíde, Glauciana da Mata imbibitions germination force Dalbergia nigra. embebição germinação vigor jacarandá-da-bahia. |
title_short |
PHYSIOLOGICAL CHANGES DURING HYDRATION OF Dalbergia nigra ((VELL.) FR. ALL. EX BENTH.) SEEDS |
title_full |
PHYSIOLOGICAL CHANGES DURING HYDRATION OF Dalbergia nigra ((VELL.) FR. ALL. EX BENTH.) SEEDS |
title_fullStr |
PHYSIOLOGICAL CHANGES DURING HYDRATION OF Dalbergia nigra ((VELL.) FR. ALL. EX BENTH.) SEEDS |
title_full_unstemmed |
PHYSIOLOGICAL CHANGES DURING HYDRATION OF Dalbergia nigra ((VELL.) FR. ALL. EX BENTH.) SEEDS |
title_sort |
PHYSIOLOGICAL CHANGES DURING HYDRATION OF Dalbergia nigra ((VELL.) FR. ALL. EX BENTH.) SEEDS |
author |
Ataíde, Glauciana da Mata |
author_facet |
Ataíde, Glauciana da Mata Borges, Eduardo Euclydes de Lima e Gonçalves, José Francisco de Carvalho Guimarães, Valéria Monteze Flores, Andressa Vasconcelos |
author_role |
author |
author2 |
Borges, Eduardo Euclydes de Lima e Gonçalves, José Francisco de Carvalho Guimarães, Valéria Monteze Flores, Andressa Vasconcelos |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Ataíde, Glauciana da Mata Borges, Eduardo Euclydes de Lima e Gonçalves, José Francisco de Carvalho Guimarães, Valéria Monteze Flores, Andressa Vasconcelos |
dc.subject.por.fl_str_mv |
imbibitions germination force Dalbergia nigra. embebição germinação vigor jacarandá-da-bahia. |
topic |
imbibitions germination force Dalbergia nigra. embebição germinação vigor jacarandá-da-bahia. |
description |
During germination, a series of sequential events occur in seeds in response to endogenous and / or exogenous factors. The objective of this study was to investigate the physiological changes resulting from the controlled hydration in water and temperature in seeds of jacaranda-da-bahia (Dalbergia nigra). To this end, two lots of seeds separated as high and low vigor were used in the tests. Seeds belonging to the two lots, after desinfect, were hydrated in water, with the method of humid atmosphere (relative humidity 95-99%) to reach four hydration levels: 10, 15, 20 and 25% moisture content in seeds, in temperatures (exogenous factor) of 15 and 25 ° C. After hydration and temperature treatments, were analyzed the following variables: curve soaking, germination percentage, germination speed index (GSI) and electrical conductivity. The results showed no significant difference in seeds physiological response between the temperatures. On the other hand, for hydration was found that up to 15% moisture content increased the seeds physiological quality of both lots, which showed higher germination values, IVG and smaller amounts of leached compounds. From 15% moisture content were found a reduction in the quality of seeds classified as high vigor, while those of low vigor continued to show positive responses in 20 and 25% humidity. Given this, it is concluded that the technique of controlled hydration in water favors the germination of Dalbergia nigra seeds, independent of the vigor. Hydration moisture content of 15% is more appropriate to increase the seeds quality. The hydration in values below or above resulted in a decrease in the stimulus. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-06-20 |
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://periodicos.ufsm.br/cienciaflorestal/article/view/22761 10.5902/1980509822761 |
url |
https://periodicos.ufsm.br/cienciaflorestal/article/view/22761 |
identifier_str_mv |
10.5902/1980509822761 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/22761/pdf |
dc.rights.driver.fl_str_mv |
Copyright (c) 2016 Ciência Florestal info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2016 Ciência Florestal |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Florestal; Vol. 26 No. 2 (2016); 615-625 Ciência Florestal; v. 26 n. 2 (2016); 615-625 1980-5098 0103-9954 reponame:Ciência Florestal (Online) instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Florestal (Online) |
collection |
Ciência Florestal (Online) |
repository.name.fl_str_mv |
Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br |
_version_ |
1799944131132260352 |