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Allelopathic properties ofPolygonella myriophylla | Journal of Chemical Ecology

Polygonella myriophylla is a perennial shrub endemic to the Florida scrub. Striking bare zones surround maturePolygonella stands. Quantitative measurements of root distribution show that fewPolygonella roots extend into the bare zones, supporting the hypothesis that the bare zones result from chemical interference byPolygonella with the growth of other species. Bioassays of soils collected biweekly for one year from beneathPolygonella, the bare zone, and adjacent grassed areas confirm that the germination and growth of grasses is reduced inPolygonella soil and soil from the surrounding bare zone. Compared to adjacent grassed area soil, the average germination of bahiagrass (Paspalum notatum) was 71% inPolygonella soil and 81% in bare zone soil, and average shoot dry weight was 48% inPolygonella soil and 81% in bare zone soil. Seasonal variation in the inhibition of grass germination and growth was not pronounced.

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1. Jeffrey D. Weidenhamer

   Present address: Department of Chemistry, Louisiana State University, 232 Choppin Hall, 70803, Baton Rouge, Louisiana

1. Department of Biology, University of South Florida, 33620, Tampa, Florida

   Jeffrey D. Weidenhamer & John T. Romeo

1. Jeffrey D. Weidenhamer
2. John T. Romeo

Weidenhamer, J.D., Romeo, J.T. Allelopathic properties ofPolygonella myriophylla . J Chem Ecol 15, 1957–1970 (1989). https://doi.org/10.1007/BF01207430

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• Received: 22 June 1988

• Accepted: 29 September 1988

• Issue Date: July 1989

• DOI: https://doi.org/10.1007/BF01207430

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