Combine first 5 ingredients in a bowl; cut in margarine with a pastry blender until mixture resembles coarse meal.
Add apricots; toss well.
Combine buttermilk, nectar, and egg; add to dry ingredients, stirring just until moistened(Dough will be sticky.)
Turn out onto a lightly floured surface; knead 4 to 5 times.
Pat into a 9-inch circle on a baking sheet coated with cooking spray.
Cut into 12 wedges, cutting to, but not through, bottom of dough.
Brush with egg white; sprinkle with 1 tablespoon sugar.
Bake at 400° for 15 minutes.