Bryant, 64, is serving a four-year sentence for an unrelated corruption conviction.
Trial judge Freda Wolfson issued the immunity order, which protects a witness against self-incrimination, earlier this month.
Salema, 64, has not been charged with any wrongdoing, and investigative sources point out that had Salema been a target of the probe, it is unlikely he would have been granted immunity.
Sarubbi said his client happened to be someone who dealt with the two principal figures in the alleged corruption scheme: Bryant and attorney Eric Wisler.
Bryant, a Democrat who represented Camden County in the State Senate from 1995 to 2008, is charged with accepting $192,000 in bogus legal fees from Wisler, who in 2004 was representing a developer with projects in Camden, Pennsauken, and the North Jersey Meadowlands.
Authorities allege that over a two-year period, Wisler, a lawyer for Cherokee Investment Partners, paid Bryant a monthly $8,000 retainer. The indictment described the payments as "a stream of concealed bribes, kickbacks and payments" in exchange for Bryant's support of legislation favorable to Cherokee projects and opposition to legislation that might hurt them.
Wisler was indicted with Bryant in September 2010.
At the time of the alleged scam, Wisler was a partner with the politically connected Bergen County law firm of DeCotiis, Fitzpatrick & Cole. He died in August after a long battle with cancer.
The 40-count indictment refers to numerous e-mails between Wisler and a "political strategist" hired to help with projects in the Cramer Hill section of Camden and on Petty's Island in Pennsauken.
That strategist has been identified as Salema, who has a checkered career in New Jersey politics.
In 1990 he was the highly regarded chief of staff and confidant of Gov. James Florio. In 1995 he pleaded guilty to charges tied to a kickback scheme in a multimillion-dollar bond sale at the Camden County Municipal Utilities Authority.
Salema was sentenced to six months in a halfway house and six months of home confinement.
Sarubbi said that he advised Salema to seek immunity before he testified before a grand jury in the Bryant case and that the current grant of immunity is merely an extension of that original court order.
"He's told them what he knows to the best of his recollection," said Sarubbi, who added that Salema's testimony is not intended to help or hurt either the prosecution or the defense.
Salema's courtroom testimony is expected to offer insights into the way the worlds of politics, government, and development overlap.
All three Cherokee projects - each valued at more than $1 billion - faltered after Wisler and Bryant were indicted. They included a residential gentrification plan for parts of Cramer Hill, a residential and recreational project for Petty's Island, and a combination residential, commercial, and golf course plan for the Meadowlands.
Bryant, once the chairman of the Senate Budget and Appropriations Committee, is serving a four-year sentence for a conviction in November 2008.
In that case, a jury found he had taken a part-time job for which he did relatively no work at the University of Medicine and Dentistry of New Jersey in exchange for steering $10 million in state funding to the school.
Wolfson presided over that trial. This time, Bryant has asked for a nonjury trial, a request the judge granted.
Bryant's court-appointed lawyer, Henry Klingeman, is expected to argue that Bryant collected legitimate legal fees from Wisler.
Klingeman has declined to comment on whether Bryant will testify. Without a jury, Bryant could decide to tell his story directly to the judge.
At a hearing in November, Klingeman said a judge would be better able to assess the "nuances" of the defense.
He also said that publicity and notoriety surrounding more than a dozen recent political corruption cases in New Jersey would make it difficult for any political figure to get a fair jury trial.
Contact staff writer George Anastasia at 856-779-3846 or ganastasia@phillynews.com.
