Hormesis Effect of Herbicides Subdoses on Submerged Macrophytes in Microassay Conditions
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Planta daninha (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100275 |
Resumo: | ABSTRACT: The goal of the study was to evaluate the effect of 2.4-D and clomazone doses on the growth of the submerged macrophytes Egeria densa and E. najas, in microassay conditions. Therefore, tests were conducted in a bioassay room at the temperature of 27.0 ± 2.0 °C, photoperiod of 24 light hours and illumination of 500 lux. The apical fragments (shoot tips) of the macrophytes with 5.0 cm of length were transferred to test tubes with a 100 mL capacity, containing 70 mL of water. The tested concentrations were: 0.1; 1.0; 3.5; 11.2; 36.5; and 118.0 mg L-1 and a control sample with seven replications. In the test with 2.4-D on E. densa, in the control sample treatment and the 0.1 mg L-1 treatment there was shorter length: at 1.0; 3.5; 11.2; 36.5 and 118.0 mg L-1 there was a relative increase of 90.6; 96.3; 91.6; 86.5 and 58.8%, demonstrating growth stimulation. E. najas behavior was similar to that of E. densa. In the test with clomazone for E. densa, the greatest length occurred in the control sample treatment. At the concentrations of 0.1; 1.0; 3.5; 11.2; 36.5 and 118.0 mg L-1, there was relative growth of -25.8; -26.4; -31.7; -28.4; -37.7 and -45.0% respectively, showing herbicidal effect on the plants. E. najas behavior was similar, with lower growth at 11.2, 36.5 and 118.0 mg L-1. Sub-doses of the herbicide 2.4-D cause growth stimulation (Hormesis effect) in E. densa and E. najas, while clomazone causes herbicidal effect. |
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Hormesis Effect of Herbicides Subdoses on Submerged Macrophytes in Microassay Conditionsgrowth stimulationaquatic plantsenvironmental dynamicspesticidesABSTRACT: The goal of the study was to evaluate the effect of 2.4-D and clomazone doses on the growth of the submerged macrophytes Egeria densa and E. najas, in microassay conditions. Therefore, tests were conducted in a bioassay room at the temperature of 27.0 ± 2.0 °C, photoperiod of 24 light hours and illumination of 500 lux. The apical fragments (shoot tips) of the macrophytes with 5.0 cm of length were transferred to test tubes with a 100 mL capacity, containing 70 mL of water. The tested concentrations were: 0.1; 1.0; 3.5; 11.2; 36.5; and 118.0 mg L-1 and a control sample with seven replications. In the test with 2.4-D on E. densa, in the control sample treatment and the 0.1 mg L-1 treatment there was shorter length: at 1.0; 3.5; 11.2; 36.5 and 118.0 mg L-1 there was a relative increase of 90.6; 96.3; 91.6; 86.5 and 58.8%, demonstrating growth stimulation. E. najas behavior was similar to that of E. densa. In the test with clomazone for E. densa, the greatest length occurred in the control sample treatment. At the concentrations of 0.1; 1.0; 3.5; 11.2; 36.5 and 118.0 mg L-1, there was relative growth of -25.8; -26.4; -31.7; -28.4; -37.7 and -45.0% respectively, showing herbicidal effect on the plants. E. najas behavior was similar, with lower growth at 11.2, 36.5 and 118.0 mg L-1. Sub-doses of the herbicide 2.4-D cause growth stimulation (Hormesis effect) in E. densa and E. najas, while clomazone causes herbicidal effect.Sociedade Brasileira da Ciência das Plantas Daninhas 2017-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100275Planta Daninha v.35 2017reponame:Planta daninha (Online)instname:Sociedade Brasileira da Ciência das Plantas Daninhas (SBCPD)instacron:SBCPD10.1590/s0100-83582017350100076info:eu-repo/semantics/openAccessPERES,L.R.S.DELLA VECHIA,J.F.CRUZ,C.eng2017-12-04T00:00:00Zoai:scielo:S0100-83582017000100275Revistahttp://revistas.cpd.ufv.br/pdaninhaweb/https://old.scielo.br/oai/scielo-oai.php||rpdaninha@gmail.com1806-96810100-8358opendoar:2017-12-04T00:00Planta daninha (Online) - Sociedade Brasileira da Ciência das Plantas Daninhas (SBCPD)false |
dc.title.none.fl_str_mv |
Hormesis Effect of Herbicides Subdoses on Submerged Macrophytes in Microassay Conditions |
title |
Hormesis Effect of Herbicides Subdoses on Submerged Macrophytes in Microassay Conditions |
spellingShingle |
Hormesis Effect of Herbicides Subdoses on Submerged Macrophytes in Microassay Conditions PERES,L.R.S. growth stimulation aquatic plants environmental dynamics pesticides |
title_short |
Hormesis Effect of Herbicides Subdoses on Submerged Macrophytes in Microassay Conditions |
title_full |
Hormesis Effect of Herbicides Subdoses on Submerged Macrophytes in Microassay Conditions |
title_fullStr |
Hormesis Effect of Herbicides Subdoses on Submerged Macrophytes in Microassay Conditions |
title_full_unstemmed |
Hormesis Effect of Herbicides Subdoses on Submerged Macrophytes in Microassay Conditions |
title_sort |
Hormesis Effect of Herbicides Subdoses on Submerged Macrophytes in Microassay Conditions |
author |
PERES,L.R.S. |
author_facet |
PERES,L.R.S. DELLA VECHIA,J.F. CRUZ,C. |
author_role |
author |
author2 |
DELLA VECHIA,J.F. CRUZ,C. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
PERES,L.R.S. DELLA VECHIA,J.F. CRUZ,C. |
dc.subject.por.fl_str_mv |
growth stimulation aquatic plants environmental dynamics pesticides |
topic |
growth stimulation aquatic plants environmental dynamics pesticides |
description |
ABSTRACT: The goal of the study was to evaluate the effect of 2.4-D and clomazone doses on the growth of the submerged macrophytes Egeria densa and E. najas, in microassay conditions. Therefore, tests were conducted in a bioassay room at the temperature of 27.0 ± 2.0 °C, photoperiod of 24 light hours and illumination of 500 lux. The apical fragments (shoot tips) of the macrophytes with 5.0 cm of length were transferred to test tubes with a 100 mL capacity, containing 70 mL of water. The tested concentrations were: 0.1; 1.0; 3.5; 11.2; 36.5; and 118.0 mg L-1 and a control sample with seven replications. In the test with 2.4-D on E. densa, in the control sample treatment and the 0.1 mg L-1 treatment there was shorter length: at 1.0; 3.5; 11.2; 36.5 and 118.0 mg L-1 there was a relative increase of 90.6; 96.3; 91.6; 86.5 and 58.8%, demonstrating growth stimulation. E. najas behavior was similar to that of E. densa. In the test with clomazone for E. densa, the greatest length occurred in the control sample treatment. At the concentrations of 0.1; 1.0; 3.5; 11.2; 36.5 and 118.0 mg L-1, there was relative growth of -25.8; -26.4; -31.7; -28.4; -37.7 and -45.0% respectively, showing herbicidal effect on the plants. E. najas behavior was similar, with lower growth at 11.2, 36.5 and 118.0 mg L-1. Sub-doses of the herbicide 2.4-D cause growth stimulation (Hormesis effect) in E. densa and E. najas, while clomazone causes herbicidal effect. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100275 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100275 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/s0100-83582017350100076 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira da Ciência das Plantas Daninhas |
publisher.none.fl_str_mv |
Sociedade Brasileira da Ciência das Plantas Daninhas |
dc.source.none.fl_str_mv |
Planta Daninha v.35 2017 reponame:Planta daninha (Online) instname:Sociedade Brasileira da Ciência das Plantas Daninhas (SBCPD) instacron:SBCPD |
instname_str |
Sociedade Brasileira da Ciência das Plantas Daninhas (SBCPD) |
instacron_str |
SBCPD |
institution |
SBCPD |
reponame_str |
Planta daninha (Online) |
collection |
Planta daninha (Online) |
repository.name.fl_str_mv |
Planta daninha (Online) - Sociedade Brasileira da Ciência das Plantas Daninhas (SBCPD) |
repository.mail.fl_str_mv |
||rpdaninha@gmail.com |
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1752126495623479296 |