Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 20, Issue 2, 2018; Page No.(513-517)

BIOCONTROL AND GROWTH PROMOTION ACTIVITY OF ENDOPHYTIC ASPERGILLUS SPP. FROM MANGO (MANGIFERA INDICA L.)

R. SANJAY, E. ESAKKIRAJA AND A. DURAIPANDI

Abstract

Entophytes are microbes that live within the plants without producing any apparent symptoms. In the last few decades, endophytic fungi were isolated from different plants, documented and their capacity to produce novel bioactive compounds was studied. In the present study endophytic Aspergillus spp. From Mango (Mangifera indica L.), two each from Angier (MLE18 and MSE22) and A. nidulans (MSE14 and MSE16) were screened for their antagonistic activity, ability to produce secondary metabolites and growth promotion. The antagonistic activity of Aspergillus spp. was tested against fungal pathogens Colletotrichun gloeosporioides (MTCC9661), Fusarium oxysporum (MTCC10278), Pestalotiopsis mangiferae (MTCC3410) and Rhizoctonia solani in paired culture technique. Among the examined endophytic isolates, A.nidulans MSE14 showed maximum inhibition percentage of 73.0 percentages, followed by A. nidulans MSE16 with 71.3 % both against R.solani. Whereas Angier (MLE18) showed maximum inhibition of 65.3% against F.oxysporum, followed by MSE22 with 59.3% against pathogen R.solani. The sterilized culture filtrate of endophytic Aspergillus spp. promoted seed germination and growth parameters in legume seeds. The growth parameters were high in the culture filtrate treatment when compared to the untreated control. Endophytic Aspergillus niger and Aspergillus nidulans showed antagonistic property and potential to produce metabolites, hence they can be further screened for production of novel chemicals with usage in different fields.

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