Isolasi dan Identifikasi Bakteri Pelarut Fosfat dan Penghasil Asam Indol Asetat dari Guano Gua Kampret dan Uji Kemampuannya dalam Meningkatkan Pertumbuhan Tanaman

Abstract

Phosphate solubilizing bacteria is a group of bacteria that dissolves unavailable phosphate into the form that can be absorbed by plants. Study about isolation and identification of phosphate solubilizing bacteria and indol acetic acid producing bacteria from bat cave guano and its potential in promoting plant growth has been done. Two phosphate solubilizing bacteria have been isolated and both were gram positive bacteria, which were ST02 and ST03. Both phosphate solubilizing bacterial isolates were tested on chilli seedlings for 30 days. The highest average plant height increasement was from ST03 treatment with value of 5.96 cm. The highest average of leaf number was from fertilizer control with value of 24.33 pieces and followed by guano control with value of 6.08 pieces. The highest average fresh weight was from ST03 treatment with value of 4.71 g. The highest average dry weight was from ST03 treatment with value of 0.72 g. Isolated phosphate solubilizing bacterial DNA were amplified using 63f and 1387r primer and analyzed using electrophoresis on 1% agarose gel. Geldoct imaging revealed that 16S rRNA gene was amplified well at 1500 bp. 16S rRNA gene sequence of PSB showed 98% similarity to Bacillus sp. for ST02 and 99% similarity to Lactobacillus plantarum for ST03.