Drying on the viability and embryonic development of Ilex paraguariensis seeds
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Ciência Florestal (Online) |
Texto Completo: | https://periodicos.ufsm.br/cienciaflorestal/article/view/24451 |
Resumo: | Yerba mate germination has been pointed as low, irregular and slow, with different degrees of dormancy, making the production of seedlings a great challenge. Studies to clarify the main mechanisms of dormancy present in yerba mate seeds are of great importance, but scarce. Therefore, we evaluated the effects of drying on the viability and the embryonic development of the species seeds. We evaluated the drying effect by determining the water content, tetrazolium test and embryo development. In order to evaluate the desiccation tolerance, the seeds were stored in a plastic tray without lid, placed on a cold and dry chamber (CFS) shelf, regulated with 25 ± 3% relative humidity and a temperature of 10 ± 1 ° C, for 70 days. Every seven days the seeds were removed from the CFS and submitted to tetrazolium test and water content evaluation. Embryo development was evaluated from excised embryos, originated from tetrazolium test. The germination test was conducted on sand substrate, in gerbox boxes placed in a growth chamber regulated at 25 °C and photoperiod of 12 hours. From seeds not subjected to drying, only 8% germinated, as a result of embryo immaturity of newly harvested seeds. Drying for 70 days promoted the embryonic development, but affected the viability of the seeds. Therefore, we recommend drying for up to 49 days to improve the germination and the subsequent seedling productions. |
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Drying on the viability and embryonic development of Ilex paraguariensis seedsSecagem na viabilidade e desenvolvimento embrionário de sementes de Ilex paraguariensisDormancyDesiccationBrazilian native speciesYerba mateDormênciaDessecaçãoEspécie nativaErva-mateYerba mate germination has been pointed as low, irregular and slow, with different degrees of dormancy, making the production of seedlings a great challenge. Studies to clarify the main mechanisms of dormancy present in yerba mate seeds are of great importance, but scarce. Therefore, we evaluated the effects of drying on the viability and the embryonic development of the species seeds. We evaluated the drying effect by determining the water content, tetrazolium test and embryo development. In order to evaluate the desiccation tolerance, the seeds were stored in a plastic tray without lid, placed on a cold and dry chamber (CFS) shelf, regulated with 25 ± 3% relative humidity and a temperature of 10 ± 1 ° C, for 70 days. Every seven days the seeds were removed from the CFS and submitted to tetrazolium test and water content evaluation. Embryo development was evaluated from excised embryos, originated from tetrazolium test. The germination test was conducted on sand substrate, in gerbox boxes placed in a growth chamber regulated at 25 °C and photoperiod of 12 hours. From seeds not subjected to drying, only 8% germinated, as a result of embryo immaturity of newly harvested seeds. Drying for 70 days promoted the embryonic development, but affected the viability of the seeds. Therefore, we recommend drying for up to 49 days to improve the germination and the subsequent seedling productions.A germinação de erva-mate tem sido apontada como baixa, irregular e lenta, com diferentes graus de dormência, tornando a produção de mudas um grande desafio. Estudos destinados a esclarecer os principais mecanismos de dormência presentes em sementes de erva-mate são de grande importância, porém, escassos. Diante disso, objetivou-se avaliar os efeitos da secagem na viabilidade e no desenvolvimento embrionário de sementes da espécie. A avaliação do efeito da secagem foi realizada mediante determinação do teor de água, teste de tetrazólio e desenvolvimento embrionário. Para avaliar a tolerância à dessecação, as sementes foram acondicionadas em uma bandeja plástica sem tampa, colocada em prateleira de câmara fria e seca (CFS), regulada com 25 ± 3% de umidade relativa do ar e temperatura de 10 ± 1°C, por 70 dias. A cada sete dias, as sementes foram retiradas da CFS e submetidas ao teste de tetrazólio e à avaliação do teor de água. O desenvolvimento embrionário foi avaliado a partir dos embriões excisados, oriundos do teste de tetrazólio. O teste de germinação foi conduzido no substrato areia, em caixas gerbox, acondicionadas em câmara de germinação regulada a 25°C e fotoperíodo de 12 horas. Das sementes que não foram submetidas à secagem, apenas 8% germinaram, resultado da imaturidade embrionária das sementes recém-colhidas. A secagem por 70 dias promoveu o desenvolvimento embrionário, mas afetou a viabilidade das sementes, sendo recomendada, portanto, sua secagem por até 49 dias para melhorar a germinação e posterior produção de mudas.Universidade Federal de Santa Maria2019-09-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/2445110.5902/1980509824451Ciência Florestal; Vol. 29 No. 3 (2019); 1354-1362Ciência Florestal; v. 29 n. 3 (2019); 1354-13621980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMporhttps://periodicos.ufsm.br/cienciaflorestal/article/view/24451/pdfCopyright (c) 2019 Ciência Florestalinfo:eu-repo/semantics/openAccessMireski, Maria CeciliaGuedes, Roberta SalesWendling, IvarMedeiros, Antonio Carlos de SouzaPeña Peña, Martha Lucía2019-10-01T13:06:32Zoai:ojs.pkp.sfu.ca:article/24451Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2019-10-01T13:06:32Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
Drying on the viability and embryonic development of Ilex paraguariensis seeds Secagem na viabilidade e desenvolvimento embrionário de sementes de Ilex paraguariensis |
title |
Drying on the viability and embryonic development of Ilex paraguariensis seeds |
spellingShingle |
Drying on the viability and embryonic development of Ilex paraguariensis seeds Mireski, Maria Cecilia Dormancy Desiccation Brazilian native species Yerba mate Dormência Dessecação Espécie nativa Erva-mate |
title_short |
Drying on the viability and embryonic development of Ilex paraguariensis seeds |
title_full |
Drying on the viability and embryonic development of Ilex paraguariensis seeds |
title_fullStr |
Drying on the viability and embryonic development of Ilex paraguariensis seeds |
title_full_unstemmed |
Drying on the viability and embryonic development of Ilex paraguariensis seeds |
title_sort |
Drying on the viability and embryonic development of Ilex paraguariensis seeds |
author |
Mireski, Maria Cecilia |
author_facet |
Mireski, Maria Cecilia Guedes, Roberta Sales Wendling, Ivar Medeiros, Antonio Carlos de Souza Peña Peña, Martha Lucía |
author_role |
author |
author2 |
Guedes, Roberta Sales Wendling, Ivar Medeiros, Antonio Carlos de Souza Peña Peña, Martha Lucía |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Mireski, Maria Cecilia Guedes, Roberta Sales Wendling, Ivar Medeiros, Antonio Carlos de Souza Peña Peña, Martha Lucía |
dc.subject.por.fl_str_mv |
Dormancy Desiccation Brazilian native species Yerba mate Dormência Dessecação Espécie nativa Erva-mate |
topic |
Dormancy Desiccation Brazilian native species Yerba mate Dormência Dessecação Espécie nativa Erva-mate |
description |
Yerba mate germination has been pointed as low, irregular and slow, with different degrees of dormancy, making the production of seedlings a great challenge. Studies to clarify the main mechanisms of dormancy present in yerba mate seeds are of great importance, but scarce. Therefore, we evaluated the effects of drying on the viability and the embryonic development of the species seeds. We evaluated the drying effect by determining the water content, tetrazolium test and embryo development. In order to evaluate the desiccation tolerance, the seeds were stored in a plastic tray without lid, placed on a cold and dry chamber (CFS) shelf, regulated with 25 ± 3% relative humidity and a temperature of 10 ± 1 ° C, for 70 days. Every seven days the seeds were removed from the CFS and submitted to tetrazolium test and water content evaluation. Embryo development was evaluated from excised embryos, originated from tetrazolium test. The germination test was conducted on sand substrate, in gerbox boxes placed in a growth chamber regulated at 25 °C and photoperiod of 12 hours. From seeds not subjected to drying, only 8% germinated, as a result of embryo immaturity of newly harvested seeds. Drying for 70 days promoted the embryonic development, but affected the viability of the seeds. Therefore, we recommend drying for up to 49 days to improve the germination and the subsequent seedling productions. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-09-30 |
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/24451 10.5902/1980509824451 |
url |
https://periodicos.ufsm.br/cienciaflorestal/article/view/24451 |
identifier_str_mv |
10.5902/1980509824451 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/24451/pdf |
dc.rights.driver.fl_str_mv |
Copyright (c) 2019 Ciência Florestal info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2019 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. 29 No. 3 (2019); 1354-1362 Ciência Florestal; v. 29 n. 3 (2019); 1354-1362 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_ |
1799944131239215104 |