Screening and identification of some APPL (acid precipitable polymeric lignin) producing Streptomycetes

Thirty seven actinomycetes isolates were isolated from Damietta soil using starch nitrate agar media. These isolates were screened for APPL by using minimal salts-yeast extract medium with rice and wheat straws. Three actinomycetes isolates showed high APPL production. These isolates also showed production of cellulase and xylanase with different levels. These isolates were identified using morphological, physiological and chemotaxonomy criteria and were identified as Streptomyces canus, Streptomyces libani and Streptomyces cyaneus.