title: Phenol content, antioxidant and tyrosinase inhibitory activity of mangrove plants in Micronesia.
abstract: OBJECTIVE
  To find out and compare the in vitro antioxidant and tyrosinase inhibitory activities of two species of mangrove plants.
  
  
  METHODS
  Mangrove samples were harvested at the shoreline on the island of Weno, Chuuk State in Micronesia. The phenol content, antioxidant activity (based on DPPH-free radical scavenging) and tyrosinase inhibitory activity in different tissues (leaves, barks and roots) of Rhizophora stylosa (R. stylosa) and Sonneratia alba (S. alba), collected from the island of Weno.
  
  
  RESULTS
  Total phenol content ranged from 4.87 to 11.96 mg per g of freeze dried samples. The highest antioxidant activity was observed in R. stylosa bark (85.5%). The highest tyrosinase inhibitory activity was found in S. alba bark. Also, total phenol content and antioxidant activity were higher in methanol extracts than in aqueous extracts.
  
  
  CONCLUSIONS
  Taken together, the results of this study proved that mangroves can be excellent sources of antioxidant compounds.
authors: South Sea Environment Research Department, Korea Institute of Ocean Science and Technology, Geoje 656-830, Korea.
authors: Sung-Suk
authors: SS
authors: Suh
authors: South Sea Environment Research Department, Korea Institute of Ocean Science and Technology, Geoje 656-830, Korea.
authors: Jinik
authors: J
authors: Hwang
authors: South Sea Environment Research Department, Korea Institute of Ocean Science and Technology, Geoje 656-830, Korea.
authors: Mirye
authors: M
authors: Park
authors: Korea South Pacific Ocean Research Center, Korea Institute of Ocean Science and Technology, Ansan, Gyeonggi-do 425-600, 425-600, Korea.
authors: Heung-Sik
authors: HS
authors: Park
authors: South Sea Environment Research Department, Korea Institute of Ocean Science and Technology, Geoje 656-830, Korea. Electronic address: tklee@kiost.ac.
authors: Taek-Kyun
authors: TK
authors: Lee
mesh_terms: D000975:Antioxidants / Q000737:chemistry / Q000378:metabolism; D001713:Biphenyl Compounds; D004791:Enzyme Inhibitors / Q000737:chemistry / Q000378:metabolism; D029561:Lythraceae / Q000737:chemistry*; D008849:Micronesia; D014442:Monophenol Monooxygenase / Q000032:analysis / Q000037:antagonists & inhibitors* / Q000378:metabolism; D010636:Phenols; D010851:Picrates; D010936:Plant Extracts / Q000737:chemistry / Q000378:metabolism; D043982:Rhizophoraceae / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D004791:Enzyme Inhibitors; D010636:Phenols; D010851:Picrates; D010936:Plant Extracts; C004931:1,1-diphenyl-2-picrylhydrazyl; D014442:Monophenol Monooxygenase
keywords: Antioxidant activity; Phebolics; Rhizophora stylosa; Sonneratia alba; Tyrosinase inhibitory activity