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vol-33NUTRITIVE AND ANTIMICROBIAL PROFILES OF SOME
SEAGRASSES FROM BARDAWIL LAKE, EGYPT
HOWAYDA H. ABD EL-HADY, S. M. DABOOR* & AWATEF E. GHONIEMY
National Institute of Oceanography and Fisheries,
Inland waters and Aquaculture Branch, El-Qanater.
*Corresponding author: [email protected]
Keywords: Bardawil Lake, Seagrasses, Biochemistry, ethanolic extract, pathogenic
microorganisms, Antimicrobial activity.
ABSTRACT
Seagrasses species in Bardawil Lake have been defined through broad quantitative
sampling. From the biochemical constituent’s point of view, two species namely;
Cymodocea nodosa and Ruppia cirrhosa were evaluated as feed additives and antimicrobial
active compounds. The obtained results showed an obvious increase in chlorophyll “a”,
carbohydrate and lipid contents in the C. nodosa than R. cirrhosa while protein contents
was higher in R. cirrhosa than in C. nodosa. Whole plant tissues powder substance
(10.0%w/v) and ethanolic extracts (200µg/ml) of C. nodosa and R. cirrhosa were evaluated
against some microorganisms using pour plate technique. Powdered substance of C. nodosa
was exhibited the highest antifungal activity than that of R. cirrhosa, also its ethanolic
extract inhibited all of the tested bacterial isolates except E. coli. R.cirrhosa whole plant
tissues powder showed antibacterial effect on all the used bacterial isolates in addition to its
reduction the radial growth of Alternaria alternatium. The inhibitory effects of the whole
powder and ethanolic extracts varied considerably between the assays microorganisms.
