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Medicinal plants may become a favourable habitat for associative microorganisms, especially endophytic microbes inhabiting Zingiberaceaen species. Preliminary investigation has revealed an assemblage of endophytic fungi colonizing the healthy rhizome of  Elettaria  sp. collected from Sibayak Forest, North Sumatra based on molecular evidences. This study investigated the IAA-producing and antifungal activity from  Elletaria  endophytic fungi identified as  Curvularia lunata, Pholiota multicingulata, Trichoderma atroviride, T. harzianum  and  Schizophyllum commune . Quantification of IAA was based on colorimetry method using Salkowsky reagent which produced pinkish to reddish solution indicating the presence of IAA. Antagonistic test was based on dual culture assay measured in colony growth inhibition (%). Statistical test to signify the differences were analysed using one-way ANOVA.  C. lunata  produced the highest IAA concentration of 45.17 µg.mL −1  followed by  S. commune , and  T. atroviride  with concentration of 11.7 and 5.27 µg.mL −1 , respectively. The strongest antagonistic activities were displayed by  T. harzianum  against both  G. boninense  (CGI&gt;75%) and  R. lignosus  (CGI&gt;50%). In addition, the strongest endophytic fungus against  F. oxysporum  was  P. multicingulata  (CGI&gt;70%). Further investigations are being conducted to elaborate other plant growth promotion properties and even characterization of bioactive metabolites produced by  Elettaria  endophytic fungi.

Antifungal activity and IAA production by endophytic fungi isolated from Elettaria sp