In the first ever league meeting between the sides, Adam Le Fondre's penalty 13 minutes from time handed the Royals their first Sky Bet Championship win since the opening day - and condemned the Glovers to a fifth consecutive defeat in all competitions.
Reading manager Nigel Adkins made sweeping changes after the Royals' 6-0 humiliation at Peterborough United - with only Chris Gunter, Shaun Cummings and Le Fondre surviving the cull.
Adkins swapped Gareth McCleary for Danny Williams in a surprise first-half substitution and the newly-introduced midfielder came closest for the Royals before the break when he volleyed former Real Madrid and Everton winger Royston Drenthe's deep cross wide of the post.
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Tuesday evening's weather for the west of the region
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A man has been cleared of smuggling 35 immigrants in to the UK in a container. One immigrant, Meet Singh Kapoor, died during the journey.