Morphological criteria and temperature for evaluation of cupuassu seed germination

Detalhes bibliográficos
Autor(a) principal: Ferraz, Isolde Dorothea Kossmann
Data de Publicação: 2012
Outros Autores: e Albuquerque, Maria Cristina de Figueiredo E., Calvi, Geangelo Petene, Farias, Derick de Lima
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional do INPA
Texto Completo: https://repositorio.inpa.gov.br/handle/1/16114
Resumo: The objectives of this study were to determine the temperature range of Theobroma grandiflorum seed germination, to indicate the most suitable temperature for the germination test and propose morphological evaluation criteria to provide data for the inclusion of this species in the Brazilian Rules for Seed Testing. The experiments were carried out in germination chambers with a 12 hour daily photoperiod, using vermiculite as substrate. Seed of T. grandiflorum were collected from the same population however of different trees at two occasions: February (lot 1) and April 2010 (lot 2). Seed germination was assessed at constant temperatures between 10 and 40°C, with an interval of 5°C. Three morphological criteria were evaluated: the protrusion (≥ 5 mm) of the first visible structure (physiological criterion), epicotyl length (≥ 3 cm; corresponding field emergence) and normal seedling development (technological criterion). The experimental design was completely randomized, with seven constant temperatures and four replicates with 25 seeds. For each criterion, germination percentage and variables of germination speed were assessed. In T. grandiflorum the hypocotyl is the first visible structure in the germination process. Its protrusion was observed between 10 and 40°C in seed lot 1 and, in seed lot 2, between 10 and 35°C. The lack of epicotyl growth and the development of normal seedlings at 10, 15 and 40°C, in both seed collections, indicate that the shoot is more sensitive to extreme temperatures than the hypocotyl and root. The lower temperature limit for shoot growth was between 15 and 20°C and the upper limit between 35 and 40°C. The temperature of 30°C is recommended for the germination test of T. grandiflorum. Observing normal seedling development, the first count could be done at day 21 and final count at day 35. Epicotyl length (≥ 3 cm) is suggested as an alternative for earlier assessment of seed germination, with the first count at day 14 and final count at day 20.
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spelling Ferraz, Isolde Dorothea Kossmanne Albuquerque, Maria Cristina de Figueiredo E.Calvi, Geangelo PeteneFarias, Derick de Lima2020-05-24T21:49:08Z2020-05-24T21:49:08Z2012https://repositorio.inpa.gov.br/handle/1/1611410.1590/S0100-29452012000300033The objectives of this study were to determine the temperature range of Theobroma grandiflorum seed germination, to indicate the most suitable temperature for the germination test and propose morphological evaluation criteria to provide data for the inclusion of this species in the Brazilian Rules for Seed Testing. The experiments were carried out in germination chambers with a 12 hour daily photoperiod, using vermiculite as substrate. Seed of T. grandiflorum were collected from the same population however of different trees at two occasions: February (lot 1) and April 2010 (lot 2). Seed germination was assessed at constant temperatures between 10 and 40°C, with an interval of 5°C. Three morphological criteria were evaluated: the protrusion (≥ 5 mm) of the first visible structure (physiological criterion), epicotyl length (≥ 3 cm; corresponding field emergence) and normal seedling development (technological criterion). The experimental design was completely randomized, with seven constant temperatures and four replicates with 25 seeds. For each criterion, germination percentage and variables of germination speed were assessed. In T. grandiflorum the hypocotyl is the first visible structure in the germination process. Its protrusion was observed between 10 and 40°C in seed lot 1 and, in seed lot 2, between 10 and 35°C. The lack of epicotyl growth and the development of normal seedlings at 10, 15 and 40°C, in both seed collections, indicate that the shoot is more sensitive to extreme temperatures than the hypocotyl and root. The lower temperature limit for shoot growth was between 15 and 20°C and the upper limit between 35 and 40°C. The temperature of 30°C is recommended for the germination test of T. grandiflorum. Observing normal seedling development, the first count could be done at day 21 and final count at day 35. Epicotyl length (≥ 3 cm) is suggested as an alternative for earlier assessment of seed germination, with the first count at day 14 and final count at day 20.Volume 34, Número 3, Pags. 905-914Attribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessTheobromaTheobroma GrandiflorumMorphological criteria and temperature for evaluation of cupuassu seed germinationCritérios morfológicos e temperatura para avaliação da germinação dassementes de cupuaçuinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleRevista Brasileira de Fruticulturaporreponame:Repositório Institucional do INPAinstname:Instituto Nacional de Pesquisas da Amazônia (INPA)instacron:INPAORIGINALartigo-inpa.pdfartigo-inpa.pdfapplication/pdf739697https://repositorio.inpa.gov.br/bitstream/1/16114/1/artigo-inpa.pdff41f12c5a838b64c9d06777780c0a36dMD511/161142020-07-14 11:32:21.139oai:repositorio:1/16114Repositório de PublicaçõesPUBhttps://repositorio.inpa.gov.br/oai/requestopendoar:2020-07-14T15:32:21Repositório Institucional do INPA - Instituto Nacional de Pesquisas da Amazônia (INPA)false
dc.title.en.fl_str_mv Morphological criteria and temperature for evaluation of cupuassu seed germination
dc.title.alternative.pt_BR.fl_str_mv Critérios morfológicos e temperatura para avaliação da germinação dassementes de cupuaçu
title Morphological criteria and temperature for evaluation of cupuassu seed germination
spellingShingle Morphological criteria and temperature for evaluation of cupuassu seed germination
Ferraz, Isolde Dorothea Kossmann
Theobroma
Theobroma Grandiflorum
title_short Morphological criteria and temperature for evaluation of cupuassu seed germination
title_full Morphological criteria and temperature for evaluation of cupuassu seed germination
title_fullStr Morphological criteria and temperature for evaluation of cupuassu seed germination
title_full_unstemmed Morphological criteria and temperature for evaluation of cupuassu seed germination
title_sort Morphological criteria and temperature for evaluation of cupuassu seed germination
author Ferraz, Isolde Dorothea Kossmann
author_facet Ferraz, Isolde Dorothea Kossmann
e Albuquerque, Maria Cristina de Figueiredo E.
Calvi, Geangelo Petene
Farias, Derick de Lima
author_role author
author2 e Albuquerque, Maria Cristina de Figueiredo E.
Calvi, Geangelo Petene
Farias, Derick de Lima
author2_role author
author
author
dc.contributor.author.fl_str_mv Ferraz, Isolde Dorothea Kossmann
e Albuquerque, Maria Cristina de Figueiredo E.
Calvi, Geangelo Petene
Farias, Derick de Lima
dc.subject.eng.fl_str_mv Theobroma
Theobroma Grandiflorum
topic Theobroma
Theobroma Grandiflorum
description The objectives of this study were to determine the temperature range of Theobroma grandiflorum seed germination, to indicate the most suitable temperature for the germination test and propose morphological evaluation criteria to provide data for the inclusion of this species in the Brazilian Rules for Seed Testing. The experiments were carried out in germination chambers with a 12 hour daily photoperiod, using vermiculite as substrate. Seed of T. grandiflorum were collected from the same population however of different trees at two occasions: February (lot 1) and April 2010 (lot 2). Seed germination was assessed at constant temperatures between 10 and 40°C, with an interval of 5°C. Three morphological criteria were evaluated: the protrusion (≥ 5 mm) of the first visible structure (physiological criterion), epicotyl length (≥ 3 cm; corresponding field emergence) and normal seedling development (technological criterion). The experimental design was completely randomized, with seven constant temperatures and four replicates with 25 seeds. For each criterion, germination percentage and variables of germination speed were assessed. In T. grandiflorum the hypocotyl is the first visible structure in the germination process. Its protrusion was observed between 10 and 40°C in seed lot 1 and, in seed lot 2, between 10 and 35°C. The lack of epicotyl growth and the development of normal seedlings at 10, 15 and 40°C, in both seed collections, indicate that the shoot is more sensitive to extreme temperatures than the hypocotyl and root. The lower temperature limit for shoot growth was between 15 and 20°C and the upper limit between 35 and 40°C. The temperature of 30°C is recommended for the germination test of T. grandiflorum. Observing normal seedling development, the first count could be done at day 21 and final count at day 35. Epicotyl length (≥ 3 cm) is suggested as an alternative for earlier assessment of seed germination, with the first count at day 14 and final count at day 20.
publishDate 2012
dc.date.issued.fl_str_mv 2012
dc.date.accessioned.fl_str_mv 2020-05-24T21:49:08Z
dc.date.available.fl_str_mv 2020-05-24T21:49:08Z
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 https://repositorio.inpa.gov.br/handle/1/16114
dc.identifier.doi.none.fl_str_mv 10.1590/S0100-29452012000300033
url https://repositorio.inpa.gov.br/handle/1/16114
identifier_str_mv 10.1590/S0100-29452012000300033
dc.language.iso.fl_str_mv por
language por
dc.relation.ispartof.pt_BR.fl_str_mv Volume 34, Número 3, Pags. 905-914
dc.rights.driver.fl_str_mv Attribution-NonCommercial-NoDerivs 3.0 Brazil
http://creativecommons.org/licenses/by-nc-nd/3.0/br/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivs 3.0 Brazil
http://creativecommons.org/licenses/by-nc-nd/3.0/br/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Revista Brasileira de Fruticultura
publisher.none.fl_str_mv Revista Brasileira de Fruticultura
dc.source.none.fl_str_mv reponame:Repositório Institucional do INPA
instname:Instituto Nacional de Pesquisas da Amazônia (INPA)
instacron:INPA
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instacron_str INPA
institution INPA
reponame_str Repositório Institucional do INPA
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