Moving Root, who has played as an opener and most of the top-order positions in his brief, 12-test career, would be the least disruptive option because Bell is a proven scorer at No. 5.
"Whoever moves up to No. 3, and it's probably fair to say Joe Root and Ian Bell are the two candidates, I'm sure they'll stand up for England,'' Gooch said. "That's what they've got to do.''
The 31-year-old Bell has batted at No. 5 in 62 of his 94 tests and scored 16 of his 20 test centuries from that position. He has scored two centuries batting at No. 3 in 21 tests. His only tests against Australia batting at No. 3 where on the 2006-07 tour when England was swept 5-0.
Root, who spent five months playing in Adelaide grade cricket in the 2010-11 season while attending the academy named after current Australia coach Darren Lehmann, says he's ready for the challenge.
He made his test debut in India last December and has shown versatility by batting up and down the order. He has scored two centuries including a test high 180 against Australia at Lord's in July when he opened with captain Alastair Cook and has 791 runs at an average of almost 40.
"There have been different obstacles to overcome and I just want to improve as a player,'' the 22-year-old Root said. "This match is massive, and it's a great opportunity to go out there and make a statement as a team and put a big score on the board.
"We can't think about last week; we have to think about this week put ourselves in the front seat on that first day in Adelaide.''
Much was made of the heated exchanges in Brisbane, were players traded angry insults and Australia captain Michael Clarke was fined after using an expletive at England tailender Jimmy Anderson that was picked up by a stump microphone used for the TV broadcast.
Root, who was targeted in an off-field episode by David Warner that resulted in the Australian opener being suspended and missing the first two tests of the last Ashes series, said the tension on the field was all part of the Ashes.
"I enjoy being out there, and the battles you get are all part of the game,'' he said. "I'm sure it will continue the whole series.
"I don't think there's much point talking about it. If we perform well that's best way of counteracting it.''
- AAP