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: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S0100-83582017350100076 http://hdl.handle.net/11449/159966 |
Resumo: | 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 degrees 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 dynamicspesticidesThe 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 degrees 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.Univ Estadual Paulista, Sao Paulo, SP, BrazilCtr Univ Fundacao Educ Barretos, Sao Paulo, SP, BrazilUniv Estadual Paulista, Sao Paulo, SP, BrazilUniv Federal VicosaUniversidade Estadual Paulista (Unesp)Ctr Univ Fundacao Educ BarretosPeres, L. R. S. [UNESP]Vechia, Della J. F. [UNESP]Cruz, C.2018-11-26T15:45:56Z2018-11-26T15:45:56Z2017-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article6application/pdfhttp://dx.doi.org/10.1590/S0100-83582017350100076Planta Daninha. Vicosa: Univ Federal Vicosa, v. 35, 6 p., 2017.0100-8358http://hdl.handle.net/11449/15996610.1590/S0100-83582017350100076S0100-83582017000100275WOS:000417875000001S0100-83582017000100275.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPlanta Daninha0,365info:eu-repo/semantics/openAccess2023-11-25T06:15:07Zoai:repositorio.unesp.br:11449/159966Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:40:32.270963Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)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. [UNESP] 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. [UNESP] |
author_facet |
Peres, L. R. S. [UNESP] Vechia, Della J. F. [UNESP] Cruz, C. |
author_role |
author |
author2 |
Vechia, Della J. F. [UNESP] Cruz, C. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Ctr Univ Fundacao Educ Barretos |
dc.contributor.author.fl_str_mv |
Peres, L. R. S. [UNESP] Vechia, Della J. F. [UNESP] Cruz, C. |
dc.subject.por.fl_str_mv |
growth stimulation aquatic plants environmental dynamics pesticides |
topic |
growth stimulation aquatic plants environmental dynamics pesticides |
description |
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 degrees 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 2018-11-26T15:45:56Z 2018-11-26T15:45:56Z |
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 |
http://dx.doi.org/10.1590/S0100-83582017350100076 Planta Daninha. Vicosa: Univ Federal Vicosa, v. 35, 6 p., 2017. 0100-8358 http://hdl.handle.net/11449/159966 10.1590/S0100-83582017350100076 S0100-83582017000100275 WOS:000417875000001 S0100-83582017000100275.pdf |
url |
http://dx.doi.org/10.1590/S0100-83582017350100076 http://hdl.handle.net/11449/159966 |
identifier_str_mv |
Planta Daninha. Vicosa: Univ Federal Vicosa, v. 35, 6 p., 2017. 0100-8358 10.1590/S0100-83582017350100076 S0100-83582017000100275 WOS:000417875000001 S0100-83582017000100275.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Planta Daninha 0,365 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
6 application/pdf |
dc.publisher.none.fl_str_mv |
Univ Federal Vicosa |
publisher.none.fl_str_mv |
Univ Federal Vicosa |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808128965748981760 |