Article (Scientific journals)
Microbial Origin of Aquaponic Water Suppressiveness against Pythium aphanidermatum Lettuce Root Rot Disease
Stouvenakers, Gilles; Massart, Sébastien; Depireux, Pierre et al.
2020In Microorganisms, 8 (11), p. 24
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Keywords :
aquaponic; disease suppressive; Pythium aphanidermatum; lettuce; high-throughput sequencing; microorganisms
Abstract :
[en] Aquaponic systems are an integrated way to produce fish and plants together with mutual benefices. In this kind of system, the use of phytosanitary treatments to control plant pathogens is sensitive. The reason is the risk of toxicity for fish present in the same water loop especially in case of a couple aquaponics. Among plant pathogens, Pythium aphanidermatum is problematics due to the Oomycetes capacity to produce mobile form of dispersion in the recirculated water. However, this study has for aim to elucidate the potential antagonistic capacity of aquaponic water against P. aphanidermatum diseases. It was shown that aquaponic water owned an inhibitory effect of P. aphanidermatum mycelial growth in in vitro conditions. The same result was shown when lettuces growing in aquaponic water were inoculated by the pseudo-fungus. The disease was thus suppressed in presence of aquaponic water, contrary to lettuces grown in hydroponic water or complemented aquaponic water (aquaponic water plus mineral nutrients). Root microbiota were analysed by 16S rDNA and ITS Illumina sequencing to determine the origin of this aquaponic suppressive action. It was determined that diversity and composition of the root microbiota was significantly correlated with the suppressive effect of AP water. Several taxa were identified to be involved in this effect. Moreover, few of these microorganisms, at the genus level, were known to have an antagonistic effect against P. aphanidermatum. These innovating results indicated that AP water could be an interesting and novel source of antagonistic agents adapted to control P. aphanidermatum diseases in soilless culture.
Research center :
Laboratoire de Phytopathologie intégrée et Urbaine
Centre de recherche en agriculture urbaine Gembloux
Disciplines :
Agriculture & agronomy
Author, co-author :
Stouvenakers, Gilles ;  Université de Liège - ULiège > Département GxABT > Gestion durable des bio-agresseurs
Massart, Sébastien  ;  Université de Liège - ULiège > Département GxABT > Gestion durable des bio-agresseurs
Depireux, Pierre
Jijakli, Haissam  ;  Université de Liège - ULiège > Département GxABT > Gestion durable des bio-agresseurs
Language :
English
Title :
Microbial Origin of Aquaponic Water Suppressiveness against Pythium aphanidermatum Lettuce Root Rot Disease
Alternative titles :
[fr] Origine microbienne de la capacité suppressive de l'eau aquaponique contre Pythium aphanidermatum, l'agent de la pourriture racinaire de la laitue
Publication date :
29 October 2020
Journal title :
Microorganisms
eISSN :
2076-2607
Publisher :
Molecular Diversity Preservation International (MDPI), Basel, Switzerland
Volume :
8
Issue :
11
Pages :
24
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 13 January 2021

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