Effect of salinity fluctuation on the soluble protein profile and isozymal patterns of enteromorpha intestinalis [L.] link from Alexandria seashore

ABSTRACT

Disc gel electrophoresis technique was applied to investigate the effect of salinity stress under controlled laboratory conditions on the soluble protein profile [SPP] isoenzyme patterns of Acid phosphatase [Ac. ph.], leucine aminopeptidase [LAP], Alkaline phosphatase [Alk. ph] alpha-esterase [alpha-eat], and Glutamate dehydrogenase [GDH] in the euryhaline green alga Enteromorpha intestinalis. The intensity of the corresponding bands of the soluble protein profile increased gradually with the increase of salinity level. No difference could be noticed in any zymogram of each of the five enzyme systems investigated under the wide range of salinity variations regarding the isozymal patterns and the intensity of the corresponding bands. The results were discussed from physiologic and taxonomic point of view