Allelopathy effect of leaves aqueous extracts of Lonchocarpus campestris on the germination and early growth of beggartick
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Revista de Ciências Agrárias (Belém. Online) |
Texto Completo: | https://ajaes.ufra.edu.br/index.php/ajaes/article/view/647 |
Resumo: | Several plant species synthesize substances called allelochemicals, which inhibit the germination and early growth of seedlings. The objective of this study was to evaluate the allelopathic action of aqueous extracts of fresh and dry Lonchocarpus campestris leaves on the germination and early growth of beggartick. The concentrations used were 0; 2; 4 and 8%. The following parameters were evaluated: germination, speed index and germination rate, length of the hypocoyl and radicle, total dry mass, and water content. The germination and speed index were reduced by increasing the concentration of the extract of fresh and dry leaves. The germination rate was reduced at 4% and 8% concentrations of the extract of dry leaves. The length of the radicle was reduced as from 2% concentration of the extract of fresh and dry leaves and the length of the hypocoyl decreased at 8% concentration of the extract of fresh leaves. The total dry mass and water content were similar among plants under different concentrations. Aqueous extracts of Lonchocarpus campestris leaves presented allelopathic effects on the seeds and seedlings of beggartick and the most radical results were caused by the dry leaves extract. |
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Revista de Ciências Agrárias (Belém. Online) |
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Allelopathy effect of leaves aqueous extracts of Lonchocarpus campestris on the germination and early growth of beggartickEfeito alelopático de extratos aquosos foliares de Lonchocarpus campestris na germinação e no crescimento inicial de picão-pretoSeveral plant species synthesize substances called allelochemicals, which inhibit the germination and early growth of seedlings. The objective of this study was to evaluate the allelopathic action of aqueous extracts of fresh and dry Lonchocarpus campestris leaves on the germination and early growth of beggartick. The concentrations used were 0; 2; 4 and 8%. The following parameters were evaluated: germination, speed index and germination rate, length of the hypocoyl and radicle, total dry mass, and water content. The germination and speed index were reduced by increasing the concentration of the extract of fresh and dry leaves. The germination rate was reduced at 4% and 8% concentrations of the extract of dry leaves. The length of the radicle was reduced as from 2% concentration of the extract of fresh and dry leaves and the length of the hypocoyl decreased at 8% concentration of the extract of fresh leaves. The total dry mass and water content were similar among plants under different concentrations. Aqueous extracts of Lonchocarpus campestris leaves presented allelopathic effects on the seeds and seedlings of beggartick and the most radical results were caused by the dry leaves extract. Diversas espécies vegetais sintetizam substâncias denominadas aleloquímicos, que inibem a germinação e o crescimento inicial de plântulas. O objetivo deste trabalho foi avaliar a ação alelopática de extratos aquosos de folhas frescas e secas de Lonchocarpus campestris sobre a germinação e o crescimento inicial de picão-preto. As concentrações empregadas foram 0, 2, 4 e 8%. Foram avaliados os seguintes aspectos: a porcentagem de germinação; o índice de velocidade e a velocidade de germinação; o comprimento de hipocótilo e de radícula; a massa seca total, e o conteúdo de água. A germinação e o índice de velocidade de germinação reduziram-se com o aumento da concentração do extrato de folhas frescas e secas. A velocidade de germinação foi reduzida pelas concentrações 4 e 8% do extrato de folhas secas. O comprimento da radícula foi reduzido a partir da concentração 2% do extrato de folhas frescas e secas, e o comprimento de hipocótilo diminuiu na concentração 8% do extrato de folhas frescas. A massa seca total e o conteúdo de água foram similares entre plântulas sob as diferentes concentrações de extratos. Extratos aquosos de rabo-de-bugio apresentam efeito alelopático sobre a germinação e o crescimento inicial de plântulas de picão-preto, sendo os resultados mais drásticos ocasionados pelo extrato de folhas secas. Universidade Federal Rural da Amazônia/UFRA2012-11-21info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://ajaes.ufra.edu.br/index.php/ajaes/article/view/647Amazonian Journal of Agricultural Sciences Journal of Agricultural and Environmental Sciences; Vol 55 No 4 (2012): RCA; 277-281Revista de Ciências Agrárias Amazonian Journal of Agricultural and Environmental Sciences; v. 55 n. 4 (2012): RCA; 277-2812177-87601517-591Xreponame:Revista de Ciências Agrárias (Belém. Online)instname:Universidade Federal Rural da Amazônia (UFRA)instacron:UFRAporhttps://ajaes.ufra.edu.br/index.php/ajaes/article/view/647/266Tur, Célia MariaMartinazzo, Emanuela GarbinAumonde, Tiago ZanattaVillela, Francisco Amaralinfo:eu-repo/semantics/openAccess2017-07-18T18:57:05Zoai:ojs.www.periodicos.ufra.edu.br:article/647Revistahttps://ajaes.ufra.edu.br/index.php/ajaes/PUBhttps://ajaes.ufra.edu.br/index.php/ajaes/oaiallan.lobato@ufra.edu.br || ajaes.suporte@gmail.com2177-87601517-591Xopendoar:2017-07-18T18:57:05Revista de Ciências Agrárias (Belém. Online) - Universidade Federal Rural da Amazônia (UFRA)false |
dc.title.none.fl_str_mv |
Allelopathy effect of leaves aqueous extracts of Lonchocarpus campestris on the germination and early growth of beggartick Efeito alelopático de extratos aquosos foliares de Lonchocarpus campestris na germinação e no crescimento inicial de picão-preto |
title |
Allelopathy effect of leaves aqueous extracts of Lonchocarpus campestris on the germination and early growth of beggartick |
spellingShingle |
Allelopathy effect of leaves aqueous extracts of Lonchocarpus campestris on the germination and early growth of beggartick Tur, Célia Maria |
title_short |
Allelopathy effect of leaves aqueous extracts of Lonchocarpus campestris on the germination and early growth of beggartick |
title_full |
Allelopathy effect of leaves aqueous extracts of Lonchocarpus campestris on the germination and early growth of beggartick |
title_fullStr |
Allelopathy effect of leaves aqueous extracts of Lonchocarpus campestris on the germination and early growth of beggartick |
title_full_unstemmed |
Allelopathy effect of leaves aqueous extracts of Lonchocarpus campestris on the germination and early growth of beggartick |
title_sort |
Allelopathy effect of leaves aqueous extracts of Lonchocarpus campestris on the germination and early growth of beggartick |
author |
Tur, Célia Maria |
author_facet |
Tur, Célia Maria Martinazzo, Emanuela Garbin Aumonde, Tiago Zanatta Villela, Francisco Amaral |
author_role |
author |
author2 |
Martinazzo, Emanuela Garbin Aumonde, Tiago Zanatta Villela, Francisco Amaral |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Tur, Célia Maria Martinazzo, Emanuela Garbin Aumonde, Tiago Zanatta Villela, Francisco Amaral |
description |
Several plant species synthesize substances called allelochemicals, which inhibit the germination and early growth of seedlings. The objective of this study was to evaluate the allelopathic action of aqueous extracts of fresh and dry Lonchocarpus campestris leaves on the germination and early growth of beggartick. The concentrations used were 0; 2; 4 and 8%. The following parameters were evaluated: germination, speed index and germination rate, length of the hypocoyl and radicle, total dry mass, and water content. The germination and speed index were reduced by increasing the concentration of the extract of fresh and dry leaves. The germination rate was reduced at 4% and 8% concentrations of the extract of dry leaves. The length of the radicle was reduced as from 2% concentration of the extract of fresh and dry leaves and the length of the hypocoyl decreased at 8% concentration of the extract of fresh leaves. The total dry mass and water content were similar among plants under different concentrations. Aqueous extracts of Lonchocarpus campestris leaves presented allelopathic effects on the seeds and seedlings of beggartick and the most radical results were caused by the dry leaves extract. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-11-21 |
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://ajaes.ufra.edu.br/index.php/ajaes/article/view/647 |
url |
https://ajaes.ufra.edu.br/index.php/ajaes/article/view/647 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://ajaes.ufra.edu.br/index.php/ajaes/article/view/647/266 |
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 |
Universidade Federal Rural da Amazônia/UFRA |
publisher.none.fl_str_mv |
Universidade Federal Rural da Amazônia/UFRA |
dc.source.none.fl_str_mv |
Amazonian Journal of Agricultural Sciences Journal of Agricultural and Environmental Sciences; Vol 55 No 4 (2012): RCA; 277-281 Revista de Ciências Agrárias Amazonian Journal of Agricultural and Environmental Sciences; v. 55 n. 4 (2012): RCA; 277-281 2177-8760 1517-591X reponame:Revista de Ciências Agrárias (Belém. Online) instname:Universidade Federal Rural da Amazônia (UFRA) instacron:UFRA |
instname_str |
Universidade Federal Rural da Amazônia (UFRA) |
instacron_str |
UFRA |
institution |
UFRA |
reponame_str |
Revista de Ciências Agrárias (Belém. Online) |
collection |
Revista de Ciências Agrárias (Belém. Online) |
repository.name.fl_str_mv |
Revista de Ciências Agrárias (Belém. Online) - Universidade Federal Rural da Amazônia (UFRA) |
repository.mail.fl_str_mv |
allan.lobato@ufra.edu.br || ajaes.suporte@gmail.com |
_version_ |
1797231627129061376 |