The investigation regards alleged bribes in which cash for an election campaign was exchanged for favours, including the extension of a port terminal concession.
The centre-right politician has said he is innocent and will be able to show his management of the northwestern Italian region was clean.
Like Toti, logistics businessman Aldo Spinelli - the former chairman of Genoa and Livorno football clubs - was also put under house arrest.
Meanwhile, former Genoa Port Authority president Paolo Signorini was placed under custody in jail.
The court said it rejected the petition as Toti “has shown that he did not fully understand the nature of the charges” against him and said there was a risk he could re-offend.
ANSA
