Bangalore-based public sector lender, Canara Bank, today revised its Benchmark Prime Lending Rate (BPLR) upwards by 50 basis points from 13.75 per cent to 14.25 per cent with effect from May 5, 2011. The Bank has also revised its Base rate upwards by 50 basis points from 9.50 per cent to 10.00 per cent with effect from May 5, the bank said.