Identifikasi Rhizobakteri pada Semanggi (Marsilea crenata Presl.) yang Terpapar Logam Berat Timbal (Pb)

Abstract

The pollution of plumbum in Benowo, Surabaya cause the decrese of water quality. The objective of this research were to identification and to know characteristic of rhizobacteria in Marsilea crenata’s roots in the farm of  Benowo, Surabaya that flated plumbum 93.61mg/Kg. This research was descriptive research. The sample were 10 gram Marsilea crenata’s roots took from Benowo farm. The observation parameter were colony morphology, gram coloration, and characteristic of biochemistry test with Microbact Identification System. The identification of  rhizobacteria isolate  with Microbact Software dan buku Cowan and Steel’s Manual for Identification of Medical Bacteria Third Edition and Bargey’s Manual of Determinative Bacteriology Eight Edition. Data were analyzed descriptive qualitatively. The results indicated that characteristic and identification isolate, there are three bacteries, Streptococcus agalactiae; Bacillus circulans and Xanthobacter autrophicus with similary koefisiens is 90,5%, 88,2% and 81,5%.