Nematicidal potential of essential oils (EOs) has been widely reported. Terpenoids present in most of the essential oils have been reported responsible for their bioactivity though very less is known about their modes of action. In the present study, an screening of nine Eos, namely, (OEO), (MTEO), (CEO), (TEO), (AEO), (MREO), (CNEO), (WEO), and (PEO) against revealed OEO, CNEO, and TEO as most effective with LC 39.37, 43.22, and 76.28 μg ml respectively. EOs had varying compositions of mono- and sesquiterpenes determined by gas chromatography-mass spectrometry (GC-MS) analysis. The molecular interactions screening of major EO constituents and the seven selected target proteins of the nematode indicated highest binding affinity of geraniol-ODR1 (odorant response gene 1) complex (ΔG = -36.9 kcal mol), due to extensive H-bonding, hydrophobic and π-alkyl interactions. The relative binding affinity followed the order: geraniol-ODR1 > β-terpineol-ODR1 > citronellal-ODR1 > -limonene-ODR1 > γ-terpinene-ODR1. Taken together, the cumulative and computational bioefficacy analysis related to the chemoprofiles of EOs provides useful leads on harnessing the potential of EOs as bionematicides. The insight on biochemical ligand-target protein interactions described in the present work will be helpful in logical selection of biomolecules and essential oils for development of practically viable bionematicidal products.
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| http://dx.doi.org/10.3389/fpls.2020.614143 | DOI Listing |
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