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Pakistan Journal of Biological Sciences

Year: 2004 | Volume: 7 | Issue: 12 | Page No.: 2039-2044
DOI: 10.3923/pjbs.2004.2039.2044
Effect of Indole Acetic Acid on in vitro Growth and Biomass Production of Some Soil Fungi
Ghazala Nasim, Memoona Rahman and Asad Shabbir

Abstract: Effect of different concentrations of Indole Acetic Acid (IAA) was studied on growth of four species of soil fungi namely; Aspergillus oryzae, A. terreus, A. niger and Alternaria alternata. The hormone was applied in various concentrations. Increased growth rate and biomass production revealed significant values when treated with dilute solutions of hormone i.e. 15, 30 and 45 mg L-1. Fresh weight and dry weight values were observed appreciably high when these fungi were treated with 45 mg L-1 concentration of the hormone solution. The data on fresh biomass revealed that the highest increase in biomass was obtained for Alternaria alternata. It was noted that there was a percentage increase of 56% in this case. Where as the data on dry biomass revealed that the highest significant increase was obtained for Aspergillus oryzae that was 66%. A significant suppressed growth in case of fresh biomass was obtained for Alternaria alternata after treated with IAA followed by Aspergillus terreus the percentage losses were 31.43 and 8.78%, respectively. The highest percentage loss for dry biomass of Aspergillus niger was 15.3%. Whereas dry biomass of Aspergillus terreus remained unchanged in comparison to 45 mg L-1.

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How to cite this article
Ghazala Nasim, Memoona Rahman and Asad Shabbir, 2004. Effect of Indole Acetic Acid on in vitro Growth and Biomass Production of Some Soil Fungi. Pakistan Journal of Biological Sciences, 7: 2039-2044.

Keywords: iaa, biomass production, soil fungi, aspergillus oryzae, a terreus, a niger and alternaria alternata

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