PMID- 33114746 OWN - NLM STAT- MEDLINE DCOM- 20210330 LR - 20210330 IS - 1420-3049 (Electronic) IS - 1420-3049 (Linking) VI - 25 IP - 21 DP - 2020 Oct 26 TI - Antibacterial Effects and Mechanism of Mandarin (Citrus reticulata L.) Essential Oil against Staphylococcus aureus. LID - 10.3390/molecules25214956 [doi] LID - 4956 AB - Staphylococcus aureus (S. aureus) creates an array of challenges for the food industry and causes foodborne diseases in people, largely due to its strong antibiotic resistance. Mandarin (Citrus reticulata L.) essential oil (MEO) is recognized as a natural and safe preservative; however, the antibacterial effects and mechanism of MEO to combat S. aureus are not yet clearly understood. This study will examine the inhibitory effects of MEO against S. aureus and explore the antibacterial mechanism thereof from the perspective of membrane destruction. The antibacterial activity of MEO on planktonic S. aureus was examined to determine the minimal inhibitory concentration (MIC). Scanning electron microscope (SEM) images revealed the direct impacts of MEO treatment on the cell structure of S. aureus. The cell membrane was observed to be depolarized, the determination of extracellular nucleic acids, proteins and intracellular adenosine triphosphate (ATP) confirmed the increased permeability of the cell membrane, its integrity was destroyed and the cellular constituents had leaked. These results, thus, provided conclusive evidence that MEO constrains the growth of planktonic S. aureus by affecting the permeability and integrity of its cell membrane. Our study provides a basis for the further development and utilization of MEO as a natural antibacterial agent in the food industry. FAU - Song, Xueying AU - Song X AD - College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi'an 710119, Shaanxi, China. FAU - Liu, Ting AU - Liu T AD - College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi'an 710119, Shaanxi, China. FAU - Wang, Lei AU - Wang L AD - College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi'an 710119, Shaanxi, China. FAU - Liu, Liu AU - Liu L AD - College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi'an 710119, Shaanxi, China. FAU - Li, Xiaoping AU - Li X AUID- ORCID: 0000-0002-6165-6842 AD - College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi'an 710119, Shaanxi, China. FAU - Wu, Xiaoxia AU - Wu X AD - College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi'an 710119, Shaanxi, China. LA - eng GR - 2018TSCXL-NY-03-02/Key Research and Development Prog rams of Shaanxi Provience of China/ GR - 20193046YF034NS034/Science and Teachnology Project of Xi'an City of China/ PT - Journal Article DEP - 20201026 PL - Switzerland TA - Molecules JT - Molecules (Basel, Switzerland) JID - 100964009 RN - 0 (Anti-Bacterial Agents) RN - 0 (Oils, Volatile) SB - IM MH - Anti-Bacterial Agents/*pharmacology MH - Citrus/*chemistry MH - Membrane Potentials/drug effects MH - Oils, Volatile/*pharmacology MH - Staphylococcus aureus/cytology/*drug effects PMC - PMC7663016 OTO - NOTNLM OT - Staphylococcus aureus OT - cell membrane OT - citrus essential oil OT - food safety COIS- The authors declare no conflict of interest. EDAT- 2020/10/30 06:00 MHDA- 2021/03/31 06:00 PMCR- 2020/10/26 CRDT- 2020/10/29 01:04 PHST- 2020/10/05 00:00 [received] PHST- 2020/10/22 00:00 [revised] PHST- 2020/10/22 00:00 [accepted] PHST- 2020/10/29 01:04 [entrez] PHST- 2020/10/30 06:00 [pubmed] PHST- 2021/03/31 06:00 [medline] PHST- 2020/10/26 00:00 [pmc-release] AID - molecules25214956 [pii] AID - molecules-25-04956 [pii] AID - 10.3390/molecules25214956 [doi] PST - epublish SO - Molecules. 2020 Oct 26;25(21):4956. doi: 10.3390/molecules25214956.