Both Stokes and Root played an array of controlled strokes, particularly through the legside, as they came to grips with the pace of the pitch and the visitors' frenetic start. Root (80) benefited from playing late with soft hands, an example his top order teammates will have noted.
Jos Buttler (13) was the other not out batsman at the interval.
Earlier, Matt Henry became New Zealand test cricketer No.266 and removed Alastair Cook and Ian Bell in his opening spell to prove his worth.
Henry had trained in the Indian Premier League under the eye of New Zealand test captain Brendon McCullum at the Chennai Super Kings. He made the transition to the test game look effortless with the rhythm mustered taking two for 19 in five overs from the Nursery End. He went to tea with two for 63 from 15 overs.
Cook, Henry's maiden test wicket, tried hooking a ball towards Edgware Rd on 16. It wasn't an ideal delivery but Cook endeavoured to seize some respite after a demanding opening 10 overs after being sent in by McCullum on a Kermit-green wicket. He ended up constricted down the legside and B-J Watling took the catch.
Henry's best delivery came with a ball deviating slightly off the wicket to take the top of Ian Bell's off stump. The sea of bacon and egg ties in the pavilion watched wicket-to-wicket as he announced himself as a competitor to be respected on cricket's ultimate stage.
Tim Southee and Trent Boult also played important roles establishing early dominance. Each worked with the Lord's slope to earn their respective wickets. Importantly, knowing his three pace bowlers were coming from the IPL, McCullum never bowled them in spells of more than five overs.
Southee dismissed debutant Adam Lyth for one with a vintage delivery which drew the opener into a defensive stroke before the ball angled away. Lyth paused to see whether he should query but Cook wisely advised him to keep walking. A Hotspot edge wouldn't have helped the home cause.
Southee was in the action again at third slip catching Gary Ballance for one. Boult angled away to the left-hander from the Pavilion End and Balance's bat took a nibble.
McCullum's decision to field in the 100th test against England was warranted. It was a fine spring day to start but cloud cover built as they hoped to generate movement with the receptive Duke ball.
New Zealand are seeking their second win in 17 attempts at the St John's Wood ground.