Abstract:
Some types of fungi are known to have the ability to produce Indole Acetic Acid
(IAA). Fungi can be isolated from the rhizosphere and tissues of various plants,
including from the rhizosphere and the root "Galam" (Melaleuca cajuputi Powell.),
which grow predominantly in peatlands. Therefore, the purposes of this study
were: (a) to isolate and measure the potential of fungi from endophytic and
rhizospheric of “Galam”(M. cajuputi) as a producer of IAA hormone, (b) determine
the types of fungal interaction that occur and their potential to increase the total
IAA hormone produced. This research begins with isolation, purification, isolate
screening, analysis of IAA hormone production, data analysis, seed germination
test and isolates identification. The result showed that the concentration of IAA
produced by Penicillium sp. IRZ15 was 5.86 ± 0.47 μg.mL-1 to 8.46 ± 0.26 μg.mL-1
and Syncephalastrum sp. AG15 is 4.77 ± 0.44 μg.mL-1 to 8.77 ± 0.25 μg.mL-1.
Meanwhile, the combination of rhizospheric fungi Penicillium sp. IRZ15 and
endophytic fungi Syncephalastrum sp. AG15 does not produce significantly different
IAA concentrations (6.42 ± 0.34 μg.mL-1 to 9.19 ± 0.50 μg.mL-1 ) compared to
fungi used alone without combinations.
