Paclobutrazol effects on cacao seedlings
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/16240 |
Resumo: | The effects of paclobutrazol (2RS, 3RS) -1-(4-Chlorophenyl) - 4,4-dimethyl-2-(1H, 2, 4-triazol- 1 -yl)-pentan-3-ol), ICI PP333 on the morphological characteristics of cacao (Theobroma cacao L.) seedlings were evaluated under greenhouse conditions. The experimental design was a complete randomized design with five treatments and 10 replications. Applications of 5, 15, 45, and 90 ppm of PP333 were made directly to the soil in which 5-months old 'Catongo' cacao seedlings were grown in 5,0 kg poliethylene bags. Plant height was the parameter more affected by the action of PP333. The height reduction by the highest rates was 32% with respect to control plants. The 15 ppm application reduced height by 17% and the 5 ppm did not statistically differ from the control. With the exception of the 90 ppm treatment which significantly reduced stem diameter, the other treatments were not statistically different from the control. Individual leaf area, in the two higher doses, was significantly lower than the control, 0,5, and 15 ppm treatments, by approximately 28%. Total dry weight of plants al the highest rate of PP333 were 21% lower than the control seedlings. Root, stem, and leaf dry weight for the 90 ppm seedlings were 32, 17 and 22% lower than control plants, respectively. The highest dose changed the partitioning of photosynthates, decreasing the root/shoot ratio which was significantly lower. |
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Paclobutrazol effects on cacao seedlingsEfeitos do paclobutrazol em plântulas de cacaugrowth regulators; Theobroma cacao; partitioningreguladores de crescimento; Theobroma cacao; distribuição de assimiladosThe effects of paclobutrazol (2RS, 3RS) -1-(4-Chlorophenyl) - 4,4-dimethyl-2-(1H, 2, 4-triazol- 1 -yl)-pentan-3-ol), ICI PP333 on the morphological characteristics of cacao (Theobroma cacao L.) seedlings were evaluated under greenhouse conditions. The experimental design was a complete randomized design with five treatments and 10 replications. Applications of 5, 15, 45, and 90 ppm of PP333 were made directly to the soil in which 5-months old 'Catongo' cacao seedlings were grown in 5,0 kg poliethylene bags. Plant height was the parameter more affected by the action of PP333. The height reduction by the highest rates was 32% with respect to control plants. The 15 ppm application reduced height by 17% and the 5 ppm did not statistically differ from the control. With the exception of the 90 ppm treatment which significantly reduced stem diameter, the other treatments were not statistically different from the control. Individual leaf area, in the two higher doses, was significantly lower than the control, 0,5, and 15 ppm treatments, by approximately 28%. Total dry weight of plants al the highest rate of PP333 were 21% lower than the control seedlings. Root, stem, and leaf dry weight for the 90 ppm seedlings were 32, 17 and 22% lower than control plants, respectively. The highest dose changed the partitioning of photosynthates, decreasing the root/shoot ratio which was significantly lower.O efeito do paclobutrazol (2RS, 3RS)-1-(4-Clorofenil) - 4,4-dimefil - 2 - (1H, 2,4 - triazol -1-it) - pentan-3-ol), ICI PP333 nas características morfológicas de plântulas de cacau (Theobroma cacao L.) foi avaliado sob condições de casa de vegetação. O delineamento experimental utilizado foi o inteiramente casualizado com cinco tratamentos e dez repetições. O experimento consistiu na aplicação de 0, 5, 15,45, e 90 ppm de PP333 em plântulas de cacau "Catongo" de 5 meses de idade crescendo em sacos de polietileno com 5 kg de solo. A altura da planta foi o parâmetro mais afetado pela ação do PP333. As maiores dosagens reduziram a altura em 32% em relação ao tratamento testemunha. A dosagem de 15 ppm reduziu o crescimento em 17% e a de 5 ppm não diferiu estatisticamente do controle. A exceção de 90 ppm, que reduziu significativamente o diâmetro do caule em 15%, não se verificaram diferenças significativas nos outros tratamentos em relação a testemunha. A área de cada folha, nas duas maiores dosagens, foi significativamente menor em relação aos tratamentos 0, 5 e 15 ppm. As dosagens maiores decresceram, aproximadamente, 25% a área das folhas. A dosagem de 90 ppm diminuiu o peso da matéria seca total em 21% em relação ao controle. Os pesos da matéria seca da raiz, caule e folhas a 90 ppm foram 32%, 27% e 22% menores, respectivamente, em relação às mesmas partes das plântulas testemunha. A dosagem maior do produto modificou a partição dinâmica de assimilados, decrescendo a razão peso seco da matéria seca da raiz/peso seco da malária seca parte aérea, que foi significativamente menor em relação aos outros tratamentos.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraValle, Raul R.Almeida, Alex Alan F. de2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/16240Pesquisa Agropecuaria Brasileira; v.24, n.9, set. 1989; 1149-1152Pesquisa Agropecuária Brasileira; v.24, n.9, set. 1989; 1149-11521678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAenghttps://seer.sct.embrapa.br/index.php/pab/article/view/16240/10418info:eu-repo/semantics/openAccess2014-08-28T20:01:18Zoai:ojs.seer.sct.embrapa.br:article/16240Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-08-28T20:01:18Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Paclobutrazol effects on cacao seedlings Efeitos do paclobutrazol em plântulas de cacau |
title |
Paclobutrazol effects on cacao seedlings |
spellingShingle |
Paclobutrazol effects on cacao seedlings Valle, Raul R. growth regulators; Theobroma cacao; partitioning reguladores de crescimento; Theobroma cacao; distribuição de assimilados |
title_short |
Paclobutrazol effects on cacao seedlings |
title_full |
Paclobutrazol effects on cacao seedlings |
title_fullStr |
Paclobutrazol effects on cacao seedlings |
title_full_unstemmed |
Paclobutrazol effects on cacao seedlings |
title_sort |
Paclobutrazol effects on cacao seedlings |
author |
Valle, Raul R. |
author_facet |
Valle, Raul R. Almeida, Alex Alan F. de |
author_role |
author |
author2 |
Almeida, Alex Alan F. de |
author2_role |
author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Valle, Raul R. Almeida, Alex Alan F. de |
dc.subject.por.fl_str_mv |
growth regulators; Theobroma cacao; partitioning reguladores de crescimento; Theobroma cacao; distribuição de assimilados |
topic |
growth regulators; Theobroma cacao; partitioning reguladores de crescimento; Theobroma cacao; distribuição de assimilados |
description |
The effects of paclobutrazol (2RS, 3RS) -1-(4-Chlorophenyl) - 4,4-dimethyl-2-(1H, 2, 4-triazol- 1 -yl)-pentan-3-ol), ICI PP333 on the morphological characteristics of cacao (Theobroma cacao L.) seedlings were evaluated under greenhouse conditions. The experimental design was a complete randomized design with five treatments and 10 replications. Applications of 5, 15, 45, and 90 ppm of PP333 were made directly to the soil in which 5-months old 'Catongo' cacao seedlings were grown in 5,0 kg poliethylene bags. Plant height was the parameter more affected by the action of PP333. The height reduction by the highest rates was 32% with respect to control plants. The 15 ppm application reduced height by 17% and the 5 ppm did not statistically differ from the control. With the exception of the 90 ppm treatment which significantly reduced stem diameter, the other treatments were not statistically different from the control. Individual leaf area, in the two higher doses, was significantly lower than the control, 0,5, and 15 ppm treatments, by approximately 28%. Total dry weight of plants al the highest rate of PP333 were 21% lower than the control seedlings. Root, stem, and leaf dry weight for the 90 ppm seedlings were 32, 17 and 22% lower than control plants, respectively. The highest dose changed the partitioning of photosynthates, decreasing the root/shoot ratio which was significantly lower. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04-17 |
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/16240 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/16240 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/16240/10418 |
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.24, n.9, set. 1989; 1149-1152 Pesquisa Agropecuária Brasileira; v.24, n.9, set. 1989; 1149-1152 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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1793416673059930112 |