March 19 (Reuters) - SPDR Gold Trust GLD , the world's largest gold-backed exchange-traded fund, said its holdings rose 0.22% to 909.28 tonnes on Wednesday from 907.27 tonnes on Tuesday. In terms of ounces, holdings HLDSPDRGT=XAU rose to 29234235 ounces from 29169672. (Bengaluru Commodities desk) ((BLRCEEditorial@thomsonreuters.com; within U.S. +1 646 223 8780; outside U.S. +91 80 6749 1298; Reuters Messaging: rmchat://room/reuters.com/Bangalore-CE-News))