BUCHAREST, Oct 11 (Reuters) - Romanian President Klaus Iohannis has proposed Dacian Ciolos, leader of a centrist party, as a candidate to form a government, after the nine-month-old minority liberal coalition of Florin Citu was toppled in a vote of no confidence last week. "(Ciolos"s) USR party was the sole party who has made a proposal to me," Iohannis told reporters regarding his decision, after holding separate consultations with all parliamentary parties. Citu"s coalition unravelled last month after USR, a relatively new grouping, withdrew its ministers in a row over a regional development fund, stripping it of its majority. USR then filed a no-confidence motion, refusing to return to the government until Citu was ousted.