UPDATE 1-Brazil's Rousseff hopes for end to Russia pork row

* Rousseff hopes for resolution of pork export problems

* Brazil accounts for 17 percent of Russia's pork imports

* Brazil has pledged to send ractopamine-free meat to Russia

MOSCOW, Dec 14 (Reuters) - Brazilian President Dilma Rousseff said after talks with President Vladimir Putin on Friday that she hopes for a successful resolution of a dispute over exports of pork to Russia, one of its largest exports markets for meat.

Moscow's tightening of requirements for the importation of meat have threatened to ruffle relations between Brazil and Russia, one of its largest export markets for meat and a partner in the BRICS group of emerging market nations.

"We hope for the successful resolution of the problems that emerged (over) Brazilian pork exports," Rouseff said following talks with Putin in the Kremlin during a two-day visit to the freezing cold Russian capital.

"We hope the resolution of this problem will stimulate further progress in the development of our bilateral relations."

Russia stepped up tests on U.S. and Canadian meat imports for traces of the feed additive ractopamine, a beta blocker that promotes muscle growth in animals including pigs and cattle, and demanded both certify their meat as ractopamine-free.

Brazil on Monday announced a temporary ban on the use of ractopamine, and Russia's food safety watchdog said on Thursday that the move could lead to an eventual increase in Brazilian exports to Russia.

Russia received 17 percent of its imported port from Brazil in the first nine months of this year.