I have alot of plaque on tooth at gum line, plaque is also discolored and i drink moderate wine. can the teeth and plaque be stained from wine?

Yes: The tannins and other agents in wine tea and coffee are fully capable of causing these stains. Of course the solution is proper plaque removal with brushing and inter-dental cleaning to get rid of that stained plaque. If it's there long enough to acquire staining, it's been there too long!

Of course: Red wine can easy stain the plaque on your teeth. Consequently, it's a good idea to brush your teeth before eating.