Allelopathy by extracts of Caatinga species on melon seeds

Authors

  • Andreya Kalyana de Oliveira Universidade Federal Rural do Semi-Árido
  • Maria de Fatima Barbosa Coelho Universidade Federal de Mato Grosso
  • Salvador Barros Torres Universidade Federal Rural do Semi-Árido
  • Francisco Ésio Porto Diógenes Universidade Federal Rural do Semi-Árido

DOI:

https://doi.org/10.5433/1679-0359.2016v37n2p557

Keywords:

Cucumis melo L., Amburana cearensis, Ziziphus joazeiro, Caesalpinia férrea, Erythrina velutina.

Abstract

The melon crop is of great socioeconomic importance in Brazil and some species from the Caatinga biome show allelopathic effects on other species. The aim of this study was to assess leaf and seed extracts of cumaru (Amburana cearensis (Allemao) A.C. Sm.), the jujube tree (Zizyphus joazeiro Mart.), Jucá (Caesalpinia ferrea Mart. Ex. Tul. Var. Ferrea) and mulungu (Erythrina velutina Willd.) on the emergence of melon seeds (Cucumis melo L.). Leaves and seeds were used to produce extracts for each species at concentrations of a) 1%, b) 0.5% c) 0.25%, d) 0.125% and e) 0% (control). The experiment was conducted with each extract type and its respective concentrations in a completely randomized design, with four replicates, each of 20 seeds. The percentage emergence and rate index, percentage of abnormal seedlings, seedling dry matter and seedling shoot and root length were assessed. Seed extracts of A. cearensis prevented melon germination, whereas the other extracts had no effect on this variable. Leaf extracts of A. cearensis and leaf and seed extracts of Z. joazeiro, C. ferrea and E. velutina resulted in abnormal melon seedlings. The percentage of abnormal melon seedlings exceeded 30% when treated with C. ferrea seed extract at the highest concentration. Most extracts did not affect seedling dry matter, but E. velutina leaf and seed extract increased the dry matter accumulation of melon seedlings and Z. joazeiro seed extract decreased dry matter accumulation at a concentration of 0.25%. The highest concentrations of mulungu and jucá leaf extracts promoted the shoot growth of melon seedlings. The extract from E. velutina seeds negatively affected root length compared to the control, similar to the effect of C. ferrea and E. velutina leaf extracts at the highest concentrations. Extracts of different organs of Caatinga plants can affect the emergence and characteristics related to seedling growth, depending on the concentration. Most extracts did not affect germination or the emergence rate index, but affected seedling growth.

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Author Biographies

Andreya Kalyana de Oliveira, Universidade Federal Rural do Semi-Árido

Pesquisadora Drª, Universidade Federal Rural do Semi-Árido, UFERSA, Mossoró, RN, Brasil. 

Maria de Fatima Barbosa Coelho, Universidade Federal de Mato Grosso

Profª, Titular, Universidade Federal de Mato Grosso, UFMT, Cuiabá, MT, Brasil. 

 

Salvador Barros Torres, Universidade Federal Rural do Semi-Árido

Prof. Colaborador, Universidade Federal Rural do Semi-Árido, UFERSA, Mossoró, RN, Brasil. 

Francisco Ésio Porto Diógenes, Universidade Federal Rural do Semi-Árido

Pesquisador, Mestre, UFERSA, Mossoró, RN, Brasil.

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Published

2016-04-26

How to Cite

Oliveira, A. K. de, Coelho, M. de F. B., Torres, S. B., & Diógenes, F. Ésio P. (2016). Allelopathy by extracts of Caatinga species on melon seeds. Semina: Ciências Agrárias, 37(2), 557–566. https://doi.org/10.5433/1679-0359.2016v37n2p557

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