biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 31:471-478, 1989 | DOI: 10.1007/BF02876220

Allelopathic actions in the Florida scrub community

N. H. Fischer1,2, G. B. Williamson2, N. Tanrisever1, Ana de la Pena1, J. D. Weidenhamer1,2, Elizabeth D. Jordan1, D. R. Richardson2
1 Department of Chemistry, Louisiana State University, Baton Rouge, USA
2 Department of Botany, Louisiana State University, Baton Rouge, USA

The hypothesis that allelochemicals released from members of the Florida scrub community deter the invasion of fire-prone sandhill grasses was investigated. Constituents of the endemic scrub members, Ceratiola ericoides, Conradina canescens and Calamintha ashei, were examined for their phytotoxic activity. Effects of the plant natural products on the germination and radicle growth of lettuce (Lactuca sativa), as well as little bluestem (Schizachyrium scoparium) and green sprangletop (Leptochloa dubia), two native grasses of the Florida sandhill community, were tested.
The data suggest that ursolic acid and other natural detergents which are released from a source plant enhance the solubilization of allelopathic lipids via micellization. In general, natural surfactants seem to play a significant role in the water transport of lipophilic phytotoxins to target seeds or seedlings.

Received: March 21, 1989; Accepted: April 12, 1989; Published: November 1, 1989  Show citation

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Fischer, N.H., Williamson, G.B., Tanrisever, N., de la Pena, A., Weidenhamer, J.D., Jordan, E.D., & Richardson, D.R. (1989). Allelopathic actions in the Florida scrub community. Biologia plantarum, 31(6), 471-478. doi: 10.1007/BF02876220
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