ISSN: 0973-7510

E-ISSN: 2581-690X

Research Article | Open Access

Tanaporn Chalearmsrimuang1, Siti Izera Ismail2, Norida Mazlan3, Supaporn Suasaard1 and Tida Dethoup1

1Department of Plant Pathology, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand.
2Department of Plant Protection, Faculty of Agriculture, Universiti Putra Malaysia, 43400 Serdang, Malaysia.
3Department of Agriculture Technology, Faculty of Agriculture, Universiti Putra Malaysia, 43400 Serdang, Malaysia.
J Pure Appl Microbiol, 2019, 13 (1): 209-223 | Article Number: 5436
Received: 07/01/2019| Accepted: 07/02/2019 | Published: 28/03/2019
Abstract

In this study, twenty marine-derived fungi were evaluated for their antagonistic activities against 10 economically important plant pathogenic fungi and investigated for their halo tolerance on potato dextrose agar (PDA) amended with 1%-25% NaCl. The results of dual culture tests showed that the marine Trichoderma species, T. asperellum and T. harzianum exhibited higher antagonistic effects against all plant pathogens than the other tested fungi, causing percentages of mycelial growth inhibition ranging from 59.31-100%. The results of dilution plate assays revealed that crude extracts of marine-derived fungi in the genera Emericella, Myrothecium, Neocosmospora, Penicillium and Talaromyces displayed great antifungal activity against plant pathogenic fungi at a low concentration of 1 g/L. However, the crude extract of Myrothecium verrucaria showed the best antifungal activity: more than 52% inhibition of five of the tested species of plant pathogenic fungi and complete mycelial growth inhibition of Bipolaris oryzae and Lasiodiplodia theobromae at 1 g/L. All of the tested marine-derived fungi were tolerant to NaCl at concentrations up to 7%. These results revealed marine-derived fungi possess exploitable antagonistic activities against plant pathogenic fungi through antibiosis, competition for nutrients and space and halo tolerance. Moreover, the results from this study showed their potential as novel BCAs for supporting crop production under climatic changes in the future.

Keywords

Antagonistic activities; marine fungi; plant pathogens; halo tolerant fungi.

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