Aspergillus terreus obtained from mangrove exhibits antagonistic activities against Pythium aphanidermatum-induced damping-off of cucumber
A study was conducted to investigate the potential of Aspergillus terreus obtained from Avicennia marina mangrove roots in inhibiting Pythium aphanidermatum and damping-off disease of cucumber. Aspergillus terreus exhibited in vitro inhibition of Pythium aphanidermatum growth. Electron microscope ex...
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doaj-0f4f9c2381de49d5bc5fd9e5f15145d72020-11-24T21:56:44ZengPeerJ Inc.PeerJ2167-83592019-10-017e788410.7717/peerj.7884Aspergillus terreus obtained from mangrove exhibits antagonistic activities against Pythium aphanidermatum-induced damping-off of cucumberHanaa Al-Shibli0Sergey Dobretsov1Abdulrahman Al-Nabhani2Sajeewa S.N. Maharachchikumbura3Velazhahan Rethinasamy4Abdullah M. Al-Sadi5Department of Crop Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Al-Khoudh, Muscat, OmanDepartment of Marine Science and Fisheries, College of Agricultural and Marine Sciences, Sultan Qaboos University, Al-Khoudh, OmanDepartment of Pathology, College of Medicine and Health Sciences, Sultan Qaboos University, Al-Khoudh, OmanDepartment of Crop Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Al-Khoudh, Muscat, OmanDepartment of Crop Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Al-Khoudh, Muscat, OmanDepartment of Crop Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Al-Khoudh, Muscat, OmanA study was conducted to investigate the potential of Aspergillus terreus obtained from Avicennia marina mangrove roots in inhibiting Pythium aphanidermatum and damping-off disease of cucumber. Aspergillus terreus exhibited in vitro inhibition of Pythium aphanidermatum growth. Electron microscope examination revealed that the antagonistic fungal isolate resulted in shrinking and groves in Pythium hypha. When Aspergillus terreus culture filtrate was added to Pythium aphanidermatum, it resulted in a significant increase (by 73%) in electrolyte leakage from Pythium hypha compared to the control, as well as significant reduction (by 71%) in oospore production. The Aspergillus terreus culture was also found to produce a cellulase enzyme, which is suggested to be involved in the antagonism against Pythium aphanidermatum. Adding Aspergillus terreus to soil infested with Pythium aphanidermatum significantly reduced percent mortality in cucumber seedlings by 70%. Aspergillus terreus, when applied alone on cucumber seedlings, did not show any suppressive effects on cucumber growth (length and fresh and dry weight). This appears to be the first report of isolation from mangrove of Aspergillus terreus with antagonistic activity against Pythium aphanidermatum-induced damping-off of cucumber. The study indicates that fungal isolates obtained from marine environments may serve as potential biocontrol agents against some plant pathogens.https://peerj.com/articles/7884.pdfBiocontrolOomyceteMarine fungiMangroveAvicennia marina |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hanaa Al-Shibli Sergey Dobretsov Abdulrahman Al-Nabhani Sajeewa S.N. Maharachchikumbura Velazhahan Rethinasamy Abdullah M. Al-Sadi |
spellingShingle |
Hanaa Al-Shibli Sergey Dobretsov Abdulrahman Al-Nabhani Sajeewa S.N. Maharachchikumbura Velazhahan Rethinasamy Abdullah M. Al-Sadi Aspergillus terreus obtained from mangrove exhibits antagonistic activities against Pythium aphanidermatum-induced damping-off of cucumber PeerJ Biocontrol Oomycete Marine fungi Mangrove Avicennia marina |
author_facet |
Hanaa Al-Shibli Sergey Dobretsov Abdulrahman Al-Nabhani Sajeewa S.N. Maharachchikumbura Velazhahan Rethinasamy Abdullah M. Al-Sadi |
author_sort |
Hanaa Al-Shibli |
title |
Aspergillus terreus obtained from mangrove exhibits antagonistic activities against Pythium aphanidermatum-induced damping-off of cucumber |
title_short |
Aspergillus terreus obtained from mangrove exhibits antagonistic activities against Pythium aphanidermatum-induced damping-off of cucumber |
title_full |
Aspergillus terreus obtained from mangrove exhibits antagonistic activities against Pythium aphanidermatum-induced damping-off of cucumber |
title_fullStr |
Aspergillus terreus obtained from mangrove exhibits antagonistic activities against Pythium aphanidermatum-induced damping-off of cucumber |
title_full_unstemmed |
Aspergillus terreus obtained from mangrove exhibits antagonistic activities against Pythium aphanidermatum-induced damping-off of cucumber |
title_sort |
aspergillus terreus obtained from mangrove exhibits antagonistic activities against pythium aphanidermatum-induced damping-off of cucumber |
publisher |
PeerJ Inc. |
series |
PeerJ |
issn |
2167-8359 |
publishDate |
2019-10-01 |
description |
A study was conducted to investigate the potential of Aspergillus terreus obtained from Avicennia marina mangrove roots in inhibiting Pythium aphanidermatum and damping-off disease of cucumber. Aspergillus terreus exhibited in vitro inhibition of Pythium aphanidermatum growth. Electron microscope examination revealed that the antagonistic fungal isolate resulted in shrinking and groves in Pythium hypha. When Aspergillus terreus culture filtrate was added to Pythium aphanidermatum, it resulted in a significant increase (by 73%) in electrolyte leakage from Pythium hypha compared to the control, as well as significant reduction (by 71%) in oospore production. The Aspergillus terreus culture was also found to produce a cellulase enzyme, which is suggested to be involved in the antagonism against Pythium aphanidermatum. Adding Aspergillus terreus to soil infested with Pythium aphanidermatum significantly reduced percent mortality in cucumber seedlings by 70%. Aspergillus terreus, when applied alone on cucumber seedlings, did not show any suppressive effects on cucumber growth (length and fresh and dry weight). This appears to be the first report of isolation from mangrove of Aspergillus terreus with antagonistic activity against Pythium aphanidermatum-induced damping-off of cucumber. The study indicates that fungal isolates obtained from marine environments may serve as potential biocontrol agents against some plant pathogens. |
topic |
Biocontrol Oomycete Marine fungi Mangrove Avicennia marina |
url |
https://peerj.com/articles/7884.pdf |
work_keys_str_mv |
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