Encapsulation of Cynara Cardunculus Guaiane-type Lactones in Fully Organic Nanotubes Enhances Their Phytotoxic Properties

Encapsulation of Cynara Cardunculus Guaiane-type Lactones in Fully Organic Nanotubes Enhances Their Phytotoxic Properties

The encapsulation of bioactive natural products has emerged as a relevant tool for modifying the poor physicochemical properties often exhibited by agrochemicals. In this regard, natural guaiane-type sesquiterpene lactones isolated from Cynara cardunculus L. have been encapsulated in a core/shell na...

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Bibliographic Details
Published in:Journal of agricultural and food chemistry Vol. 70; no. 12; pp. 3644 - 3653
Main Authors: Mejías, Francisco J.R, Fernández, Inmaculada P, Rial, Carlos, Varela, Rosa M, Molinillo, José M.G, Calvino, José J, Trasobares, Susana, Macías, Francisco A
Format: Journal Article
Language:English
Published: United States American Chemical Society 30-03-2022
Subjects:
Bioactive Constituents, Metabolites, and Functions
Cynara - chemistry
Lactones - chemistry
Lactones - toxicity
Nanotubes
Plant Extracts - chemistry
Plant Extracts - pharmacology
Sesquiterpenes, Guaiane
encapsulation
aguerin B
lolium perenne
grosheimin
cynara cardunculus
weed bioassay
organic nanotubes, cynaropicrin
portulaca oleracea, STEM−XEDS
phalaris arundinacea
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Summary:The encapsulation of bioactive natural products has emerged as a relevant tool for modifying the poor physicochemical properties often exhibited by agrochemicals. In this regard, natural guaiane-type sesquiterpene lactones isolated from Cynara cardunculus L. have been encapsulated in a core/shell nanotube@agrochemical system. Monitoring of the F and O signals in marked sesquiterpenes confirmed that the compound is present in the nanotube cavity. These structures were characterized using scanning transmission electron microscopy–X-ray energy-dispersive spectrometry techniques, which revealed the spatial layout relationship and confirmed encapsulation of the sesquiterpene lactone derivative. In addition, biological studies were performed with aguerin B (1), cynaropicrin (2), and grosheimin (3) on the inhibition of germination, roots, and shoots in weeds (Phalaris arundinacea L., Lolium perenne L., and Portulaca oleracea L.). Encapsulation of lactones in nanotubes gives better results than those for the nonencapsulated compounds, thereby reinforcing the application of fully organic nanotubes for the sustainable use of agrochemicals in the future.
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ISSN:0021-8561
1520-5118
DOI:10.1021/acs.jafc.1c07806