النشاط الإنزيمي خارج خلوي لبعض الفطريات الممرضة لنخيل التمر Phoenix dactylifera و السايكس Cycas revolute

الملخص EN

This study was conducted at the Laboratories.of Date Palm Research Center-Basrah univ.

to determine the extracellular enzymatic activity of some Date Palm and Cycas fungal pathogen which were Fusarium solani ; Mauginiella scaettae and Thielaviopsis paradoxa in their production to Protease ; cellulose ; Lipase ; Amylase and Phenol oxidase enzymes on special solid media designed to quantative test.

The results elucidated that the pathogenic fungi varied in their ability to produce degredating enzymes, the causal agent of Cycas decline F.

solani showed a positive test for all studied enzymes with varying degree of activity, the highest extracellular activity were in Protease and Amylase test, while the causal agent of Date Palm inflorescence rot M.

scaettae recorded highest activity for Protease test and good activity for Phenol oxidase enzyme, the pathogen gave a negative test for Amylase.

The pathogenic fungus T.

paradoxa the causal agent of Terminal Bud rot of Date Palm had a moderate activity for Protease ; Lipase and gave a negative test for Amylase.