1. Dept. of Agro-Environmental and Territorial Sciences; Univ. Of Bari; Via Amendola 165/A 70126 Bari Italy
2. Laboratory of Microbial Ecology and Technology; Biocatalysis and Industrial Enzymes Group; Carthage Univ., Natl. Inst. of Applied Sciences and Technology (INSAT); BP 676, 1080 Tunis Cedex Tunisia