حساسية فطر التعفن الاخضر المعزول من الحمضيات تجاه بعض املاح البيكاربونات

Abstract

This study have been done to know the sensivity of the fungus Penicillium digitatum (Pers.:Fr)
Sacc.toward some bicarbonat salts ( NaHCO3 , KHCO3 and NH4HCO3 ) at various concentration ranged
between( 0.0 – 100.0)mM . The result indicates that the three salts give clear effect to inhibit fungal
colonies growth. There were a reversiabl relationship between the salts (bicarbonate) concentration and the
means of redial growth of colony. 10.0mM was gave the minimum growth inhibition while 50.0mM gave
the maximum growth inhibition. There were a reversiabl relationship between pH and the mean of redial
growth.The minimum growth inhibition was at pH = 7.0 while maximum growth inhibition was at pH = 10.0.There were a clear effect on colony diameter when there were an interaction occure between pH and
salts concentration , at 0.0mM concentration ,the minimum growth inhibition was at pH = 6.0 while
maximum growth inhibition was at pH = 8.5 . , at 5.0mM concentration ,the minimum growth inhibition
was at pH = 4.5 while maximum growth inhibition was at pH = 8.5 , at 25.0mM concentration ,the
minimum growth inhibition was at pH = 4.5 while maximum growth inhibition was at pH = 8.5 , and at
50.0mM concentration ,the minimum growth inhibition was at pH = 4.5 while maximum growth
inhibition was at pH = 8.5 .