UDPATE 1-Euro zone would take action if needed-German FinMin

* Schaeuble says ready to act, no need for Greece aid now

* Govt source says IMF a possibility if Greece needs aid

(Adds quotes, combines stories)

BERLIN, March 16 (Reuters) - Euro zone states would take decisive and coordinated action if one state in the group were to face bankruptcy, German Finance Minister Wolfgang Schaeuble said on Tuesday, adding such a situation had not arisen so far.

Schaeuble also said debt-ridden Greece had not asked for help and had taken measures that had helped to reassure markets.

"It is clear that in the case of an imminent emergency ... euro zone member states will if necessary take decisive and coordinated measures to safeguard the financial stability of the euro zone as a whole," Schaeuble said.

"We are not in this situation," he said in the Bundestag lower house of parliament, adding he was increasingly worried about speculators targeting currencies.

Fears that Greece may fail to tackle its budget deficit and that the problem could spread have hit the euro in recent weeks.

EU finance ministers meeting in Brussels on Tuesday discussed standby plans drawn up by countries using the euro to provide Greece with financial help if it becomes the first state in 11 years of monetary union to seek such aid [ID:nLDE62F0D9].

Schaeuble said the euro zone had to be prepared for the worst and stressed the importance of the stability of the euro.

"The long-term stability of the common European currency is ... something we must guarantee in our own interests," he said.

A government source told Reuters Berlin was open to the possible involvement of the International Monetary Fund (IMF) if Greece were to require aid.

The source said this did not just mean technical support, but even financial assistance.

Until now, senior German politicians, including Schaeuble have voiced opposition to any IMF involvement.

(Reporting by Paul Carrel and Madeline Chambers; Editing by Ron Askew)