Propsed changes in rail services mean just one train a day would run directly from Stranraer to Glasgow.
Operator Abellio takes over the ScotRail franchise in April and the proposals mean a reduction from four direct trains to one.
Passengers have been told they will still be able to connect with ongoing trains to Glasgow from Ayr.
But Stranraer councillor Willie Scobie this week claimed the changes would lead to further isolation of south west Scotland and slammed the firm’s shortsightedness.
South of Scotland SNP MSP Aileen McLeod said she will be continuing discussions regarding the future of direct rail services between Stranraer and Glasgow with the new Minister for Transport and Islands, Derek MacKay.
This follows correspondence and a meeting with the previous Transport Minister Keith Brown, prior to the Scottish Government reshuffle before Christmas.
Aileen said: “I welcomed the new franchise for Scotrail services when it was announced and I remain of the view that it has distinct benefits for Stranraer, including services every two hours, eliminating some big gaps in the current timetable and the introduction of a scenic tourist trains service to attract visitors.”
The MSP added: “However, I do also recognise the concerns expressed by SAYLSA and others regarding the future of the three direct services to Glasgow and met with the Minister for Transport and Veterans at the time, Keith Brown, to discuss these issues.
“Given there is now a new Transport Minister, Derek MacKay, I intend to follow up those discussions with him.