Revista da FCCXXT

Studies on the Allelopathic Potential of Acacia dealbata Link.: Allelopathic Potential Produced During Laboratory Decomposition of Plant Residues Incorporated Into Soil

Manuel J. Reigosa1, Alejo Carballeira Ocaña2

1 Departamento de Bioloxía Vexetal e Ciencia do Solo, Facultade de Bioloxía, Universidade de Vigo, Spain.
2 Departamento de Bioloxía Fundamental, Facultade de Bioloxía, Universidade de Santiago de Compostela, Spain.



ABSTRACT

Allelopathic effects produced during the decomposition of different plant materials coming from Acacia dealbata incorporated into soil were studied by means of two bioassays on Lactuca sativa var. Great Lakes, Trifolium repens and Lolium perenne. Results confirm their extraordinary potential allelopathic capacity. In particular, decomposing leaves showed high phytotoxic capacity followed by flowers. The third assayed material, roots, happened to be the least inhibiting one, even though at different moments it inhibited significantly the germination and the radicle growth of the assayed species.

Toxicity keeps high during long periods, even up to the end of experiences (16 weeks), with some differences related to the assayed receiving species.


Keywords: Acacia dealbata, Lactuca sativa, Trifolium repens, Lolium perenne, phytotoxicity, allelopathy, plant residues decomposition.



RECEIVED: June 30, 2016
ACCEPTED: December 28, 2016



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