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The first evidence of gibberellic acid's ability to modulate target species’ sensitivity to honeysuckle (Lonicera maackii) allelochemicals

PUBLISHED April 28, 2023 (DOI: https://doi.org/10.54985/peeref.2304p6126090)



Csengele Barta1 , Brian Jenkins1 , Devon Lindstrom1 , Alyka Zahnd1 , Gyongyi Szekely2
  1. Missouri Western State University, Department of Biology
  2. Hungarian Department of Biology and Ecology, Faculty of Biology and Geology, Babeș-Bolyai University

Conference / event

Plant Biology 2023, August 2023 (Savannah, GA, United States)

Poster summary

Invasive species employ competitive strategies such as releasing allelopathic chemicals into the environment that negatively impact native species. Decomposing Amur honeysuckle (Lonicera maackii) leaves leach various allelopathic phenolics into the soil, decreasing the vigor of native species. Notable differences in the net negative impacts of L. maackii metabolites on target species were argued to depend on soil properties, the microbiome, proximity to the allelochemical source, the allelochemical concentration, or environmental conditions. This study is the first to address the role of target species’ metabolic properties in determining their net sensitivity to allelopathic inhibition by L. maackii. We hypothesized that GA3 levels might affect the target sensitivity to allelopathic inhibitors and evaluated differences in the response of a standard (control, Rbr), a GA3-overproducing (ein), and a GA3-deficient (ros) Brassica rapa variety to L. maackii allelochemicals. Our results demonstrate that high GA3 concentrations substantially alleviate the inhibitory effects of L. maackii allelochemicals.


Allelopathy, Phenolics, Gibberellic acid, Invasive species, Lonicera maackii, Apigenin and luteolin

Research areas

Biological Sciences, Plant Sciences, Agriculture, Biochemistry, Ecology and Forestry


No data provided


  1. American Society of Plant Biologists
  2. Department of Biology, Missouri Western State University

Supplemental files

  1. Manuscript_10.3390/plants12051014   Download

Additional information

Competing interests
No competing interests were disclosed.
Data availability statement
The datasets generated during and / or analyzed during the current study are available from the corresponding author on reasonable request.
Creative Commons license
Copyright © 2023 Barta et al. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Barta, C., Jenkins, B., Lindstrom, D., Zahnd, A., Szekely, G. The first evidence of gibberellic acid's ability to modulate target species’ sensitivity to honeysuckle (Lonicera maackii) allelochemicals [not peer reviewed]. Peeref 2023 (poster).
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