HT can never recreate the natural density or "closeness" of hair follicles
though it can give that illusion...in your case a very good illusion
so parting the hair (to make a straight-line part) in the recipient area (i'm thinking you meant recipient area, the place in which donor hair was transplanted) will show more skin than the straight-line part made in the non-recipient of donor hair region (in your case, down the center)
now this scalp show is probably not a concern if you comb the region forward or even straight back or styling without a noticeable straight line part
but only when styling to get an exposed scalp with a straight-line part (like in the early 60's, aka MAD MEN)