IAA AND GA 3 ASSAYS OF RHIZOSPHERE FUNGI FROM JABON MERAH (NEOLAMARCKIA MACROPHYLLA) STAND OF SIDRAP PROVENANCE, SOUTH SULAWESI

Fungi have been shown to synthesize various plant hormones, including gibberellin, abscisic acid (ABA) and
cytokinin. This study aimed to determine the ability of rhizosphere fungi from the jabon Merah stand to produce IAA and GA3. Samples were collected from the jabon Merah stand of Sidrap provenance, South Sulawesi. IAA and GA3 assayed of the fungi were carried out at Biotechnology and Tree Breeding Laboratory, Faculty of Forestry, Universitas Hasanuddin. Eight fungi isolates were used in the experiment. IAA assay showed that the highest IAA concentration was from JCS 6 isolate, 17.95 ppm.
Similarly, JCS 6 isolate also had the highest GA
concentration (4.20 ppm) by GA3 3 assay. This study will be followed by macroscopic and molecular identification of the JCS 6 isolate. The detection is needed in order to develop the mass production of fungi as biological agents.