ABSTRACT
ISOLATION AND CHARACTERIZATION OF
Actinomycetes THAT HAVE ANTIBACTERIAL ABILITY TO Escherichia coli AND
Staphylococcus aureus FROM THE RHIZOSPHERE OF SUGAR
CANE PLANTS (Saccharum officinarum)
Name : Wahyu
Nur Sulistyanto
Regist. Number : 15030244001
Study Program : Biology Program
Department : Biology
Faculty : Mathematics
and Natural Sciences
Institution : Universitas
Negeri Surabaya
Supervising Lecturer: Guntur
Trimulyono, S.Si., M.Sc.
The phenomenon of increasing human
bacterial infections and increased
resistance to antibiotics encourages the exploration of more antibiotic
producers. One source of antibiotics comes from the Actinomycetes bacteria, the
source of isolation comes from the rhizosphere of sugarcane plants because it
is known in the rhizosphere to produce exudates that are beneficial to
bacteria. The purpose of this study was to determine the antibacterial ability,
characteristics and symmetry index between selected isolates. Initial isolation
was carried out using Starch Casein Agar (ScA) media, then Color grouping, Gram
test and cell morphology observation. The next step is testing the
antibacterial activity using the well method. Isolates proven to have
antibacterial abilities continued with morphological, physiological and
biochemical characterization. Then a Generic assignment (Profile Matching) is
performed to determine the suspected genus of selected bacteria. Data obtained
in the form of average diameter inhibition zone, count of antibacterial
activity, character of isolates and simmilarity index. The results showed that
4 isolates had antibacterial ability against test bacteria, among others,
ACB34a isolates, ACB44c isolates, ACB44c isolates and ACB55c isolates. Having
the results of the similarity index of ACB34a isolates with ACB55c with a value
of 0.856, then the isolates of ACB54c with ACB44c have similarities of 0.788
and ACB55c with ACB34a worth 0.7788.
Keywords : Antibacterial; Actinomycetes; Rhizosphere
of sugar cane; Characterization