title: Essential oil constituents and in vitro antimicrobial activity of Decalepis hamiltonii roots against foodborne pathogens.
abstract: Hydrodistillation of Decalepis hamiltonii roots yielded an essential oil (0.33% v/w) that contained 2-hydroxy-4-methoxybenzaldehyde (37.45%), 2-hydroxybenzaldehyde (31.01%), 4-O-methylresorcylaldehyde (9.12%), benzyl alcohol (3.16%), and alpha-atlantone (2.06%) as major constituents, with aromatic aldehydes constituting the main fraction of this root's essential oil. The oil was tested for its antimicrobial activity against foodborne pathogens responsible for food spoilage and human pathologies using standard antimicrobial assays. It exhibited strong antimicrobial activity against Bacillus cereus, Bacillus megaterium, Candida albicans, Escherichia coli, Micrococcus luteus, Micrococcus roseus, and Staphylococcus aureus at a concentration range of 1:0 with inhibitory activities of 27, 23, 16, 19, 22, 19, and 23 mm, respectively, which are comparable to those of the standards. The roots of D. hamiltonii, therefore, may be considered as an inexpensive source of an essential oil rich in antimicrobial compounds against foodborne pathogens.
authors: Department of Botany, Sri Krishnadevaraya University, Anantapur 515003, Andhra Pradesh, India.
authors: Devarajan
authors: D
authors: Thangadurai
authors: Sreeyapureddy
authors: S
authors: Anitha
authors: Thammineni
authors: T
authors: Pullaiah
authors: Ponnathota Narasimha
authors: PN
authors: Reddy
authors: Oleti Siva
authors: OS
authors: Ramachandraiah
mesh_terms: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents / Q000032:analysis* / Q000494:pharmacology*; D001409:Bacillus cereus / Q000187:drug effects; D001410:Bacillus megaterium / Q000187:drug effects; D002176:Candida albicans / Q000187:drug effects; D004926:Escherichia coli / Q000187:drug effects; D005516:Food Microbiology; D029965:Gentianaceae / Q000737:chemistry*; D008837:Micrococcus / Q000187:drug effects; D009822:Oils, Volatile / Q000032:analysis*; D018517:Plant Roots / Q000737:chemistry*; D013211:Staphylococcus aureus / Q000187:drug effects
chemical_list: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D009822:Oils, Volatile