Enron Corp. founder Kenneth Lay worried in 2001 that the company’s mounting financial problems would jeopardize its credit rating and inquired about managing its accounting to avoid a downgrade, a former Enron treasurer testified Wednesday.

Testimony by former Treasurer Ben Glisan Jr., which began late Tuesday and has outlined a series of what he said were public fabrications by Lay and former Chief Executive Officer Jeffrey Skilling about the health of the company, struck a nerve with Lay.