The rupee ended lower by 19 paise to 45 rupees 25 against the US currency on renewed dollar demand from banks and importers despite a weak dollar overseas.Forex dealers said that the dollar fell against the yen in Sydney market after Japan's Prime Minister Naoto Kan warned of a radiation leak following the third explosion at a reactor in the nuclear plant at Fukushima of Japan following an earthquake and tsunami.Meanwhile, global crude oil was trading below 99 dollars a barrel in London today.