Durik-durik (Syzygium sp.) is one of plants belongs to the family Myrtaceae that found in Kajuik Lake, Langgam, Pelalawan District, Riau Province. This plant is well adapted to waterlogging conditions and potential as a source of tolerant genes of flooding. Gene expression analysis requires internal controls such as actin and 18S rRNA. This study aimed to isolate actin and 18S rRNA genes o…