Isolation and identification of rhizospheric fungus under Mahoni (Swietenia mahagoni) stands and its ability to produce IAA (Indole Acetid Acid) hormones

Abstract

Abstract Rhizosphere is a part of the soil that is in the roots of plants in which there are many soil microorganisms. One of the microorganisms found in the rhizosphere is fungi. Rhizosphere fungus plays an important role in increasing plant growth by various mechanisms that are carried out such as increasing nutrient absorption, as a bilogical control of pathogenic attacks and can produce growth hormones for plants. This study aims to identify and get the information of the diversity of rhizosphere fungi from mahogany stands in two provenances, and get information on IAA level production. The research methods include isolation of fungi and identification of rhizosphere fungi, as well as test of IAA production capability qualitatively and quantitatively. The results showed 17 rhizosphere fungus isolates were found under the mahogany stand in Takalar District those were included in the genus Rhizopus, Fusarium, Aspergillus, Penicillium and Gliocladium , whereas 11 Mahogany stands in the Maros Regency were included in the genus Trichoderma, Gliocladium, Rhizopus and Aspergillus. The whole genus is capable of producing IAA hormone, but the genus capable of producing the highest IAA is the Trichoderma genus.

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