(AGI) Milan, Sept 11 - The Italian stock exchange closedslightly lower on Thursday, in line with a cautious approachthroughout Europe in view of Scotland's referendum onindependence and new sanctions against Russia. The FTSE MIBdropped by 0.23 percent to 21,092 points, and the All Share by0.21 percent. Fiat increased by 1.53 percent a day after theannouncement that Marchionne will replace Montezemolo at thehead of Ferrari. (AGI) . .