In any proceeding brought under this part 1, the petitioner, at the time of filing the petition or at any time thereafter during the pendency of such proceeding, may file with the county clerk and recorder of the county in which the property sought to be condemned is situated a notice of the pendency of the proceeding, containing a general description of the property affected. The filing of such notice shall be constructive notice of the proceeding to any purchaser or encumbrancer of said property. The petitioner shall take all property condemned under this part 1 free of all conveyances, taxes, or assessments that have attached thereto subsequent to the filing of the lis pendens.