Allelopathic evidence in Brachiaria decumbens and its potential to invade the Brazilian Cerrados

Brazilian Archives of Biology and Technology

Elizabeth Gorgone Barbosa¹  Vânia Regina Pivello¹  Sérgio Tadeu Meirelles¹ 

[1] ,Universidade de São Paulo Instituto de Biociências Departamento de EcologiaSão Paulo SP ,Brasil

关键词: allelopathy;    cerrado;    biological invasion;    Brachiaria decumbens;    Melinis minutiflora;   

DOI  :  10.1590/S1516-89132008000400021

来源: SciELO

【 摘 要 】

The aim of this study was to look for evidence of allelochemicals in B. decumbens, in parts of the plant from where they could easily be released to the environment. The germination inhibition of Phalaris canariensis, Lactuca sativa (standard species) and Melinis minutiflora, another invasive African grass, was tested using B. decumbens germinating seeds and aqueous leachates of the roots, green and senescent leaves, at 5, 10 and 20% w/v. Both the germinating seeds and the aqueous leachates of B. decumbens reduced the germination of the species tested; the effectiveness of the aqueous leachates increased according to concentration. Apparently, the competitive advantage of B. decumbens in the cerrados could be amplified via allelopathy.

【 授权许可】

CC BY-NC   
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