A publicly traded U.S. tobacco company has bought controlling stakes in two Canadian marijuana producers and invested in a North Carolina hemp grower, making what is believed to be the first foray by a significant tobacco business into the cannabis industry. Alliance One International, which trades on the New York Stock Exchange under the ticker symbol AOI, said it acquired a 75% equity position in Canada’s Island Garden and an 80% stake in Goldleaf Pharm. Terms of the transactions were not disclosed. The moves were first reported by New Cannabis Ventures.