Referendums in two French overseas departments have rejected plans for increased autonomy. With a 48% turnout, 69.8% in French Guiana voted against the proposal.In Martinique, the margin was greater- 80% voted against, with a 55% turnout. The votes come a year after violent protests over low wages hit French Caribbean territories.French President Nicolas Sarkozy proposed holding the referendums after visiting Martinique in June.Voters were asked whether they wanted local government to be given more powers, a change that would make the departments more like autonomous French territories.