But if this was a litmus test to see how they might cope with the pressure of knockout matches when they host next year's World Cup, England came through it with flying colours, dominating this contest from start to finish to wrap up a sixth successive ODI series win.
Kane Williamson's side tumbled to 93-6 in Taylor's absence, before Mitchell Santner (67) and Henry Nicholls (55) revived the innings with a stand of 84 for the seventh wicket.
Bairstow and Alex Hales put on 155 for the first wicket as England rampaged towards their small target of 224.
The 34-year-old produced a match-winning unbeaten 181 in the fourth one-day worldwide on Wednesday, despite having aggravated a thigh injury and suffering cramps that restricted his movement and forced him to limp singles in the successful run chase. But exemplary new ball work from Mark Wood and Chris Woakes - named man of the series for his 10 wickets at 20.30 - reduced the Blackcaps to 26 for two, before Adil Rashid and Moeen Ali combined, bowling their full allocations through unhindered, to inflict a collapse of four wickets for 33 runs.
However, it was Bairstow, striking nine fours and six sixes during a brutal 60-ball knock, who stole the show.
The platform for the triumph was laid early when England's bowlers constricted New Zealand's top order.
Root batted on, powerless as a series of partners departed, to reach his 11th ODI century from 99 balls before being dismissed in the 48th over, at which stage England had lost 7-28.
"Throughout this series, there were some very good one-off performances, but it probably overshadowed a batting line-up that hasn't quite fired".
Once opener Martin Guptill fell for 47, New Zealand looked close to subsiding.
With Grant Elliot's retirement, Luke Ronchi's inconsistency and Corey Anderson's hit-miss form, New Zealand had plenty to look after as far as ODI cricket goes.
But however, this two teams have returned from the last T20I tournament which was Trans Tasman Tri Series where Australia and New Zealand were the local team and England was the guest team. They got victory in the first match.
Bairstow had earlier held a stunning, running catch at deep mid-wicket to remove Tim Southee. Nicholls hit Root's off-spin for six but he top-edged Tom Curran to short leg at an inopportune moment.
"It's different from batting in the middle order but my job now is to score big hundreds and contribute match-winning scores", said man-of-the-match Bairstow, who also took a brilliant, diving one-handed catch on the boundary. "It was a brilliant innings by Jonny - hitting the ball cleanly like he has all series". Had England batted first, or if they had been forced to chase 300, then there would have been a clearer indication of whether they are becoming mentally strong enough to win a global tournament, in comparison to all previous England one-day sides that have buckled.
The seven wicket victory England earned was brilliantly set up by the England bowlers who quickly assessed conditions and put the Black Caps on the back foot. "Following that was always going to be hard but I thought our spinners really did that and created a lot of chances".
His second shot bounced through the green and left him with a tricky downhill pitch - but Woods was ideal with his third shot. Then he holed a chip shot from over the ninth green for a birdie that brought him into a tie and electrified the crowd.
Real Madrid have closed the gap on second-placed Atletico Madrid with a hard-fought 2-1 win in Saturday's La Liga clash at Eibar . Lucas Vazquez and Karim Benzema replaced Isco and Toni Kroos as Zidane looked to raise the tempo and find a second goal.
Chelsea have returned to winning ways in the Premier League by overcoming Crystal Palace 2-1 at Stamford Bridge this evening. The struggle for Chelsea is to secure one of the four Champions League places.
Whereas Apple Music is now growing by 5% every month, Spotify is said to be growing it subscriber base by about 2% every month. In addition to its paid service, Spotify also offers an free ad-supported version to help draw users into the service.
The US has been very critical of both Kenyatta and Odinga, Soi noted. "And, hopefully we can progress from this". Alfred Mutua has issued a warning following the meeting between Raila Odinga and President Uhuru Kenyatta.
Six Big Ten schools received berths into the 2018 NCAA Division I Women's Basketball Championship, it was announced Monday night. Keep scrolling down and you come to the Big Ten, which has a final four of Michigan State, Purdue , Michigan and Ohio State .
Dumervil, 34, was set to receive a $500,000 roster bonus on Tuesday and would have carried a $4.25 million cap hit in 2018. Releasing Sherman, who spent seven seasons with the team, saves the team $11 million against the 2018 salary cap.
President Donald Trump's requested military parade will likely take place on Veterans Day and stretch between the U.S. However, a Pentagon memo declared the parade to be excluding tanks in order to lessen the impact inflicted on roads.
Jans did not know much about Clemson on Sunday, but, obviously, the work on scouting the Tigers begins right away. Villanova faced LIU Brooklyn in the NCAA Tournament in 1997 and came out with a win by a final of 101-91.
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Trump blocks Broadcom takeover of Qualcomm
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Indian Wells: Venus cuts short Serena's comeback
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Turkish plane with 11 on board crashes
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Elon Musk wants to preserve humanity in space
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Farmers' march to reach Mumbai on Monday
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Google Doodle: the Winter Paralympic Games in Pyeongchang
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Spurs shrug off Kane injury, Arsenal silence Watford's Deeney
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Richard Sherman thanks fans for support after release
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Sherman to meet with 49ers on Saturday
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Bannon: 'Let them call you racists'
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