England captain Alastair Cook led from the front with a well-made hundred as the hosts battled back in the first Test against New Zealand at Lord's on Sunday.
When rain led to an early tea on the fourth day, England in their second innings were 261 for four, a lead of 127 runs.
Cook was 105 not out and Ben Stokes unbeaten on 22.
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This was left-handed opener Cook's second hundred in as many Tests after he ended a near two-year-wait for a Test ton with 105 against the West Indies in Barbados earlier this month.
The 30-year-old's latest Test century -- his first in England since his 130 against New Zealand at Headingley in 2013 -- was especially timely after Ian Bell fell to the third ball of Sunday's play.
New Zealand had a first-innings lead of 134, with Kane Williamson making an impressive 132.
England resumed on 74 for two, 60 runs adrift, with Cook (32 not out) and Bell (29 not out).
They had not added to their score when, off just the third ball of Sunday's play, Bell, trying to drive a Tim Southee outswinger, edged high through to Tom Latham, deputising for injured wicket-keeper BJ Watling.
England, in their first match since former captain Andrew Strauss was appointed their director of cricket and with Jason Gillespie reportedly waiting in the wings to replace the sacked Peter Moores as the team's full-time coach, now badly needed a decent stand between Cook and Root.
In the face of testing pace bowling, Cook responded with a 122-ball fifty that took the left-handed opener three hours.
At lunch, England were 175 for three, a lead of 41, with Cook 69 not out and Root unbeaten on 58.
As the ball became older, things got tougher for New Zealand's quicks while off-spinner Mark Craig, given the difficult job of succeeding the retired Daniel Vettori as New Zealand's specialist slow bowler, was 'milked' for 54 runs in 10 overs with both Cook and vice-captain Root sweeping him to good effect.
But just as he had done in last year's Lord's Test against India when he holed out to Ishant Sharma, Root fell into an obvious hooking trap when he failed to get over the top of a bouncer from debutant fast bowler Matt Henry and picked out Trent Boult at long leg.
Root, who made 98 in the first innings of this match, faced 139 balls including 12 fours.
England were now 232 for four, effectively 98 for four, with the first of this two-match series still in the balance.
Despite New Zealand captain Brendon McCullum setting an unorthodox 8-1 offside field, a composed Cook off-drove Henry for three to complete a 206-ball century featuring 12 fours in five hours and 20 minutes at the crease.
It meant Cook extended his England Test century record to 27 and this was his fourth Test ton at Lord's.