The Northern Territory Government is facing losing majority power with senior MLA Kezia Purick expected to quit the party this morning, the ABC understands.

The NT Government has a one-seat majority in the 25-seat Legislative Assembly.

Ms Purick, who is the Member for Goyder, has become increasingly agitated at what she believes is the lack of an integrity body to improve governance and transparency, as well as poor communication from the leadership to Country Liberals (CLP) MLAs.

Sources have confirmed she will announce her resignation from the CLP this morning (CST).

Last week, a senior adviser to Community Services Minister Bess Price was charged with corruption offences after a police investigation into a government travel transaction.

Ms Purick has recently spoken out against her own Government about development in Darwin's rural area.

What happens if Kezia Purick leaves the CLP?

If Ms Purick leaves the CLP and becomes an independent, the Government would be left with only 12 seats in the Legislative Assembly.

It would need to stitch up a deal with one of the independents to govern in minority power for the remainder of its term, until the NT election in August next year.

It would be open for a newly independent Ms Purick to strike a deal with her former party, which would make her the Territory's most powerful politician.

The NT Government's other options would be to try to win over independents Gerry Wood, also a representative of the Darwin rural area, or former Country Liberals members Alison Anderson, Larisa Lee or Robyn Lambley.

Mr Wood has become a staunch critic of the Government, particularly to do with integrity issues that have dogged the Country Liberals of recent months, including political donations and alleged travel rorts.

Ms Anderson, Ms Lee and Ms Lambley have also attacked their former party about integrity issues.

And the three women have been vitriolic in their attacks on Chief Minister Adam Giles and would not be expected to agree to any deal while he remained at the helm.

Ms Purick has been contacted for comment.