The goal came after 58 minutes when Danny Murphy's corner was prodded goalwards by Grant Hanley. The ball was cleared by Aaron Cresswell and ricocheted in off unfortunate keeper Stephen Henderson, with the goal given as an own goal by the latter.
But Appleton said Rhodes got a touch before Cresswell cleared, and that the ball was over the line.
"He had the last touch on the ball before Cresswell tried to clear it and it's one of them," Appleton said.
"If you've got Hawk-Eye, it would be able to tell us if it was over the line or not from the clearance but it's difficult to tell when you look back on the DVD. But like I say, the last touch came from Jordan as it was heading towards the goal so I'm sure he'll get the reward."
The former Ipswich striker was off the pitch in the first half after a clash with Tommy Smith left him with a bloody nose and Appleton said: "He broke his nose in the first half but if you're a professional footballer and have not broken your nose once there's something wrong.
"When he was off the field, it gave them a bit of impetus in the game and it took 10 minutes for us to regain our composure."
Were the goal to be reallocated to Rhodes it would mean he had scored in seven consecutive league games, equalling a club record set by Eddie Quigley in the 1954-55 season.