Vol. 5 No. 3-4 (1999)
Articles

Allelopathic effect of the Cladonia verticillaris lichen extracts and fumarprotocetraric acid on the early growth of germinating seeds and seedlings in Allium cepa L.

Published September 13, 1999
A. M. Yano-Melo
Universidade Federal de Pernambuco, Depto. Micologia, C.C.B., Recife, 50670-710, Brazil
C. Vicente
Complutense University of Madrid, Laboratory of Plant Physiology, Faculty of Biology, Spain
L. Xavier-Filho
Universidade Federal da Paraiba, Lab. Tecnologia Farmaceutica, Joao Pessoa, 58059-900, Brazil Present address: Embrapa-Cpatsa, Laboratorio de Biotecnologia, C.P. 23, Petrolina, PE, 56300-000, Brazil
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APA

Yano-Melo, A. M., Vicente, C., & Xavier-Filho, L. (1999). Allelopathic effect of the Cladonia verticillaris lichen extracts and fumarprotocetraric acid on the early growth of germinating seeds and seedlings in Allium cepa L. International Journal of Horticultural Science, 5(3-4), 31–35. https://doi.org/10.31421/IJHS/5/3-4/39

The allelopathic activity of the different extracts of the lichen Cladonia verticillaris and fumarprotocetraric acid on the early growth of A cepa (IPA 6) seedlings depends on their chemical composition and concentration, respectively. It was observed that the length of the radicle was significantly stimulated by fumarprotocetraric acid at high concentrations and by the total extract of C. verticillaris thalli, which contained a high level of fumarprotocetraric, acid confirmed by HPLC-technique. In addition, it was found, that the phosphate buffer extract, which contained high level of methyl (3-orcinol carboxilate measured by HPLC, reduced the length of the hypocotyls significantly. Under our experimental conditions there was no influence of the different types of extract and fumarprotocetraric acid on the ratio of seed germination, in relation to the control. From the study of HPLC it was found that fumarprotocetraric acid and methyl 13-orcinol carboxilate were present in all extracts at different concentrations, depending on the method of extraction.

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