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Phytotoxic Effects of Plant Essential Oils: A Systematic Review and Structure-Activity Relationship Based on Chemometric Analyses
- Source :
- Plants, Plants, Vol 10, Iss 36, p 36 (2021)
- Publication Year :
- 2020
- Publisher :
- MDPI AG, 2020.
-
Abstract
- Herbicides are natural or synthetic chemicals used to control unwanted plants (weeds). To avoid the harmful effects of synthetic herbicides, considerable effort has been devoted to finding alternative products derived from natural sources. Essential oils (EOs) from aromatic plants are auspicious source of bioherbicides. This review discusses phytotoxic EOs and their chemical compositions as reported from 1972 to 2020. Using chemometric analysis, we attempt to build a structure-activity relationship between phytotoxicity and EO chemical composition. Data analysis reveals that oxygenated terpenes, and mono- and sesquiterpenes, in particular, play principal roles in the phytotoxicity of EOs. Pinene, 1,8 cineole, linalool, and carvacrol are the most effective monoterpenes, with significant phytotoxicity evident in the EOs of many plants. Caryophyllene and its derivatives, including germacrene, spathulenol, and hexahydrofarnesyl acetone, are the most effective sesquiterpenes. EOs rich in iridoids (non-terpene compounds) also exhibit allelopathic activity. Further studies are recommended to evaluate the phytotoxic activity of these compounds in pure forms, determine their activity in the field, evaluate their safety, and assess their modes of action.
- Subjects :
- Review
Plant Science
01 natural sciences
Terpene
chemistry.chemical_compound
bioherbicides
Linalool
Organic chemistry
Carvacrol
Ecology, Evolution, Behavior and Systematics
Allelopathy
Pinene
Ecology
010405 organic chemistry
Caryophyllene
aromatic plants
Botany
0104 chemical sciences
010404 medicinal & biomolecular chemistry
chemistry
Germacrene
volatile oils
QK1-989
allelopathy
Phytotoxicity
terpenes
Subjects
Details
- ISSN :
- 22237747
- Volume :
- 10
- Database :
- OpenAIRE
- Journal :
- Plants
- Accession number :
- edsair.doi.dedup.....982a789fd873d427d22dbc96cf5cb77e