* TSX rises 33.72 points, or 0.26 percent, to 12,854.64 * Nine of 10 main index sectors advance * Potash surges, has biggest positive influence on market * BlackBerry climbs about 6 percent on report of buyout By John Tilak TORONTO, Sept 9 (Reuters) - Canada's main stock index rose on Monday after shares of natural resource companies benefited from positive data out of China, but declines in the price of gold and oil capped those gains. Still, a surge in shares of Potash Corp and BlackBerry also supported the overall market. But fears about military action in Syria and concerns that the U.S. Federal Reserve might soon begin dialing back its stimulus measures continued to unnerve investors. "It's a muted rally. We really haven't got the lift from the Chinese export news that one would have expected," said Elvis Picardo, strategist at Global Securities in Vancouver. "There's too much uncertainty for investors to jump into volatile groups like energy and commodities." "Investors are hoping that any fallout from the (Syrian) conflict wouldn't be too severe and it would be contained." Data showed Chinese export growth topped expectations in August. Despite the export-focused Canadian market's exposure to the Chinese economy, a major consumer of commodities, the TSX underperformed the S&P 500 on Monday. The Toronto Stock Exchange's and S&P/TSX composite index closed up 33.72 points, or 0.26 percent, at 12,854.64. Among the top gainers, fertilizer maker Potash Corp added 4.8 percent closing at C$32.90 on market speculation that a dispute with Russia that split the Belarus potash consortium may be resolved. In turn, that could herald higher potash prices. "The rebound (in Potash Corp) may be a reflection of people thinking that the Russians may not engage in a price war," said Gavin Graham, chief strategy officer at Integris Pension Management Corp. Meanwhile, BlackBerry climbed 5.9 percent following a report that investor, Fairfax Financial, was closing in on a rescue deal for the smartphone maker. Nine of the 10 main sectors on the index were higher. The materials sector, which includes mining stocks, climbed 0.5 percent, with gains in Potash offsetting a drop in gold producers. Goldcorp Inc lost 1.2 percent to C$30.19, and Eldorado Gold Corp gave back 4.3 percent to C$8.39. After a bid by Gabriel Resources Ltd to open Europe's biggest open-cast gold mine in Romania looked set to be rejected due to mounting opposition, shares of the miner slumped by around 54 percent to 68 Canadian cents. Shares of energy companies added 0.3 percent. Suncor Energy Inc rose 0.3 percent to C$36.79. Financials, the index's most heavily weighted sector, gained 0.1 percent. Toronto-Dominion Bank was up 0.2 percent at C$91.36, and Sun Life Financial Inc added 0.4 percent to C$33.12. BlackBerry advanced to C$11.96, pushing the information technology sector up 1.4 percent. In other company news, Oncolytics Biotech Inc said its cancer drug Reolysin reduced the size of tumors in 92 percent of lung cancer patients in a mid-stage trial. The stock jumped 12 percent to C$3.09.