Shares of Beyond Meat Inc. shot up 14% in premarket trading Thursday, after McDonald’s Corp. said it will trial a plant-based burger made by Beyond Meat. Starting Sept. 30, McDonald’s will sell what it will called the P.L.T. — Plant. Lettuce. Tomato. — in 28 restaurants in Southwestern Ontario. The trial is slated to run for 12 weeks.Market Pulse Stories are Rapid-fire, short news bursts on stocks and markets as they move. Visit MarketWatch.com for more information on this news.