Phytotoxicity of exotic plants on the physiological potential of seeds of native species of caatinga

Autores

  • Silvana Fraga Silva Universidade Federal do Ceará - UFC
  • Halina Stéffany Lopes Costa
  • Jesimiel Silva Viana
  • Ana Maria Oliveira Ferreira
  • Diego Sousa Pereira Universidade Federal de Lavras
  • Sebastião Medeiros Filho Universidade Federal do Ceará

DOI:

https://doi.org/10.18227/1982-8470ragro.v12i2.4884

Palavras-chave:

Germination. Biological invasion. Allelopathic potential.

Resumo

The introduction of species is one of the major causes of biodiversity loss. Invasive exotic plants adapt, propagate and dominate, damaging both natural processes and native species. Thus, the objective was to evaluate the allelopathic effect of three exotic species in the caatinga, on the physiological quality of native forest seeds. Aqueous extracts of leaves of Azadirachta indica, Prosopis juliflora and Cryptostegia madagascariensis were tested to evaluate their effect on the seed germination and seedling vigor of Piptadenia moniliformis, Mimosa tenuiflora and Mimosa caesalpiniaefolia. Seed germination of M. tenuiflora was inhibited by the aqueous extracts of P. juliflora and A. indica in 100% and 42%, respectively, with a reduced GVI with the extracts of P. juliflora and C. madagascariensis. Regarding AEI, P. juliflora extract had positive effect on P. moniliformis seeds and negative on M. tenuiflora seeds, close to -1. A reduction in height of P. moniliformis was observed when the seedlings were in contact with the extracts of the invasive plants studied. For M. tenuiflora, the extract of P. juliflora prevented the formation of seedlings, and M. caesalpiniaefolia presented higher inhibitory effect with extracts of P. juliflora and A. indica. Therefore, M. tenuiflora showed to be sensitive to P. juliflora phytotoxicity.

Biografia do Autor

Silvana Fraga Silva, Universidade Federal do Ceará - UFC

Mestranda em Agronomia/Fitotecnia pela Universidade Federal do Ceará, com mobilidade acadêmica na Universidade Federal de Lavras.

Halina Stéffany Lopes Costa

Mestre em agronomia/fitotecnia pela Universidade Federal do Ceará

Jesimiel Silva Viana

Eng. Agrônomo pela Universidade Federal do Ceará

Ana Maria Oliveira Ferreira

Mestranda em Agronomia/Fitotecnia pela Universidade Federal de Lavras

Diego Sousa Pereira, Universidade Federal de Lavras

Doutor em Agronomia/Fitotecnia pela Universidade Federal de Lavras

Sebastião Medeiros Filho, Universidade Federal do Ceará

Prof. Titular e bolsista de produtividade CNPQ, da Universidade Federal do Ceará.

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Publicado

30/06/2018

Edição

Seção

Original Scientific Article