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2014 | 36 | 12 |

Tytuł artykułu

Phytotoxic effects of Heterothalamus psiadioides (Asteraceae) essential oil on adventitious rooting

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
Essential oils have many functions in plant development; among them, they take part in plant–plant interactions, such as allelopathy. The phytotoxicity of the essential oil of Heterothalamus psiadioides was evaluated on Arabidopsis thaliana adventitious rooting. This development process has demonstrated great sensitivity to phytotoxic essential oils and has been primarily studied by our research group. The essential oil of H. psiadioides showed highly negative effects on A. thaliana wild type (WT) adventitious rooting in very small amounts. As the hormone auxin has an important role on adventitious rooting, A. thaliana mutant superroot (sur1) that overproduces indole-3-acetic acid was tested to verify if it could better respond to the oil than WT. The mutant had a WT-like rooting response and the expression of its phenotype was not evident in treatments that had oil application. The essential oil also induced the generation of H₂O₂, a reactive oxygen species in high levels and trying to recover these effects with the aid of the antioxidant Trolox® was unsuccessful. Increasing levels of H₂O₂ may affect leaf pigmentation of WT microcuttings and auxin levels of both WT and sur1 microcuttings. Since the expression of auxinresponsive genes is decreased by H₂O₂ treatment via mitogen-activated protein kinase activation, microcuttings growth and rooting are impaired causing altered development pattern.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

36

Numer

12

Opis fizyczny

p.3163-3171,fig.,ref.

Twórcy

  • Programa de Pos-Graduacao em Botanica, Instituto de Biociencias, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
  • Laboratorio de Ecologia Química e Quimiotaxonomia (LEQTAX), Departamento de Botanica, Instituto de Biociencias, Universidade Federal do Rio Grande do Sul, Av. Bento Goncalves 9500, Porto Alegre, RS, Brazil
autor
  • Programa de Pos-Graduacao em Botanica, Instituto de Biociencias, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
  • Laboratorio de Ecologia Química e Quimiotaxonomia (LEQTAX), Departamento de Botanica, Instituto de Biociencias, Universidade Federal do Rio Grande do Sul, Av. Bento Goncalves 9500, Porto Alegre, RS, Brazil
  • Programa de Pos-Graduacao em Botanica, Instituto de Biociencias, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
  • Laboratorio de Ecologia Química e Quimiotaxonomia (LEQTAX), Departamento de Botanica, Instituto de Biociencias, Universidade Federal do Rio Grande do Sul, Av. Bento Goncalves 9500, Porto Alegre, RS, Brazil
  • Centro de Ciencias Agrarias e Biologicas, Universidade de Caxias do Sul, Rua Francisco Getulio Vargas 1130, Caxias do Sul, RS, Brazil
  • Programa de Pos-Graduacao em Botanica, Instituto de Biociencias, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
  • Laboratorio de Ecologia Química e Quimiotaxonomia (LEQTAX), Departamento de Botanica, Instituto de Biociencias, Universidade Federal do Rio Grande do Sul, Av. Bento Goncalves 9500, Porto Alegre, RS, Brazil

Bibliografia

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Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

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