The trainer, who helped to nurture the Chilean's talent at Udinese, believes a switch to Turin would solve the club's lack of width in attack.
The 25-year-old has been linked with a move from Camp Nou to the reigning Scudetto holder in recent weeks as Antonio Conte looks to bolster his attacking ranks in the summer.
Marino coached Alexis during two stints with Udinese before the winger joined the Blaugrana in a 37 million euro deal in 2011 and believes the Chilean, Fernando Llorente and Carlos Tevez could form a strong attacking trio in Turin.
"I think Alexis could fit very well into Conte's gameplan," the trainer told Tuttomercatoweb. "He can cover both the role of second striker or as a winger in a trident. His versatility makes Alexis a factor that can helps him solve many coaching headaches. You need balance but a trident of Tevez-Llorente-Alexis is feasible as Alexis and Tevez know how to work in the defensive side of things.
"This past year Alexis has had several fitness problems, but this season he has improved a lot despite little continuity. When playing at clubs like Barcelona, it is normal to have problems playing all of the time but his performances have always been positive. He's a great professional with a great work ethic and this will help him keep growing."
Juve midfielder Arturo Vidal, who plays alongside Alexis for Chile, urged his compatriot make the move from Spain back to Italy last month.