Article (Scientific journals)
Interaction between the barley allelochemical compounds gramine and hordenine and artificial lipid bilayers mimicking the plant plasma membrane
Lebecque, Simon; Crowet, Jean-Marc; Lins, Laurence et al.
2018In Scientific Reports, 8, p. 10845
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Abstract :
[en] Some plants affect the development of neighbouring plants by releasing secondary metabolites into their environment. This phenomenon is known as allelopathy and is a potential tool for weed management within the framework of sustainable agriculture. While many studies have investigated the mode of action of various allelochemicals (molecules emitted by allelopathic plants), little attention has been paid to their initial contact with the plant plasma membrane (PPM). In this paper, this key step is explored for two alkaloids, gramine and hordenine, that are allelochemicals from barley. Using in vitro bioassays, we first showed that gramine has a greater toxicity than hordenine towards a weed commonly found in northern countries (Matricaria recutita L.). Then, isothermal titration calorimetry was used to show that these alkaloids spontaneously interact with lipid bilayers that mimic the PPM. The greater impact of gramine on the thermotropic behaviour of lipids compared to hordenine was established by means of infrared spectroscopy. Finally, the molecular mechanisms of these interactions were explored with molecular dynamics simulations. The good correlation between phytotoxicity and the ability to disturb lipid bilayers is discussed. In this study, biophysical tools were used for the first time to investigate the interactions of allelochemicals with artificial PPM.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Lebecque, Simon ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Chimie des agro-biosystèmes
Crowet, Jean-Marc 
Lins, Laurence  ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Chimie des agro-biosystèmes
Delory, Benjamin
du Jardin, Patrick  ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Ingénierie des productions végétales et valorisation
Fauconnier, Marie-Laure  ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Chimie des agro-biosystèmes
Deleu, Magali  ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Chimie des agro-biosystèmes
Language :
English
Title :
Interaction between the barley allelochemical compounds gramine and hordenine and artificial lipid bilayers mimicking the plant plasma membrane
Publication date :
2018
Journal title :
Scientific Reports
eISSN :
2045-2322
Publisher :
Nature Publishing Group, United Kingdom
Volume :
8
Pages :
10845
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
CÉCI : Consortium des Équipements de Calcul Intensif
Name of the research project :
PDR grant T.1003.14 / IAP P7/44 iPros) / Action de Recherche Concertée-Project FIELD / Grant No. 2.5020.11
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Belgian Program on Interuniversity Attraction Poles initiated by the Federal Office for Scientific, Technical and Cultural Affairs
ULiège - Université de Liège [BE]
CÉCI - Consortium des Équipements de Calcul Intensif [BE]
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