Negative plant-microbiome feedback limits productivity in aquaponics

Day, Jessica A.; Otwell, Anne E.; Diener, Christian; Tams, Kourtney E.; Bebout, Brad M.; Detweiler, Angela M; Lee, Michael; Scott, Madeline T.; Ta, Wilson; Ha, Monica; Carreon, Shienna A; Tong, Kenny; Ali, Abdirizak A; Gibbons, Sean M.; Baliga, Nitin S.

doi:10.1101/709162

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…group that, among the components of the system, was larger in the biofilter, while benzeneamine, N-ethyl- was negatively but not significantly ( p > 0.05) correlated with LAB, which were not quantified in this niche. In accordance with our results, Day et al [ 35 ] observed an accumulation of Pseudomonas in the biofilters of an aquaponic system during a cultivation cycle. The Pseudomonas spp.…”

Section: Resultssupporting

confidence: 94%

Plant Volatiles of Lettuce and Chicory Cultivated in Aquaponics Are Associated to Their Microbial Community

2021

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In this work, an aquaponic cultivation system for Lactuca sativa (L.) and Chicorium intybus (L.) was compared to a hydroponic one, focusing on the main microbial populations related to food safety and their volatile compounds (VOCs), concluding with Spearman correlations among the microbes and VOCs. Different sections of both systems were sampled at the end of the commercial development of the plants. Plants cultivated in aquaponics were in general more contaminated than those from hydroponics, while for the cultivation waters a higher contamination of the hydroponics than aquaponics system was unexpectedly observed. Furthermore, the chicory exhibited higher levels of all microbial groups compared to lettuce grown under the same cultivation system. The results obtained also showed correlations between the distribution of some VOCs and microbial groups in the phyllosphere, while some examples of positive correlations between 2-nonanone (a positive phytostimulant compound) and anaerobic bacilli of the rhizosphere in lettuce were reported. So far, multivariate analysis of VOCs was able to discriminate on the basis of varieties but not on the cultivation systems. In conclusion, the microbial characteristics of the two ecosystems depended both on plant variety and cultivation method but further studies will need to deeply investigate the variables influencing the microbial quality of vegetable foods obtained by aquaponics. On the other hand, the analysis of the VOCs was more related to the microbial community of each plant variety considered, whatever the cultivation system. In precision agriculture, metabolomics may represent an opportunity to study the holobiome and through it the interactions between plants and their microbial populations, to possibly provide for a tool to assess the microbiological quality of vegetable foods obtained by aquaponic systems.

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Section: Resultssupporting

confidence: 94%

Plant Volatiles of Lettuce and Chicory Cultivated in Aquaponics Are Associated to Their Microbial Community

2021

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“…Among NOBs, Nitrospira and Nitrobacter were found in all plots. Nitrifying bacteria including Nitrosomonas, Nitrobacter, and Nitrospira are commercially used for initiating nitrogen cycling and promoting plant growth [35][36][37]. These bacteria seemed to play important roles in the tanks of AP and AC.…”

Section: Discussionmentioning

confidence: 99%

The Growth of Leaf Lettuce and Bacterial Communities in a Closed Aquaponics System with Catfish

et al. 2021

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Aquaponics is a circulating and sustainable system that combines aquaculture and hydroponics and forms a symbiotic relationship between fish, plants, and microorganisms. We hypothesized that feed alone could support plant growth, but the symbiosis with fish adds some beneficial effects on plant growth in aquaponics. In this study, we created three closed culture systems, namely, aquaponics, hydroponics without nitrogen (N) and phosphorus (P), and aquaculture, and added the same amount of feed containing N and P to all the treatments in order to test the hypothesis. Accumulation of NO3− and PO43− was alleviated in aquaponics and hydroponics as a result of plant uptake. Lettuce plants grown in aquaponics grew vigorously until 2 weeks and contained a constant level of N in plants throughout the production period, whereas those in hydroponics grew slowly in the early stage and then vigorously after 2 weeks with a late increment of N concentration. These results suggest that catfish help with the faster decomposition of the feed, but, in hydroponics, feed can be slowly dissolved and decomposed owing to the absence of the fish. The bacterial community structures of the culture solution were investigated using 16S rRNA gene amplicon sequencing. At the class level, Actinobacteria, Alphaproteobacteria, Betaproteobacteria, and Gammaproteobacteria were the major microbial groups in the solutions. Aquaponics prevented the pollution of tank solution and maintained a higher water quality compared with hydroponics and aquaculture, suggesting that aquaponics is a more sustainable cultivation system even in a small-scale system.

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Challenges in achieving an economically sustainable aquaponic system: a review

Thaiparambil

Vidya

2022

Aquacult Int

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Negative plant-microbiome feedback limits productivity in aquaponics

Cited by 3 publications

References 18 publications

Plant Volatiles of Lettuce and Chicory Cultivated in Aquaponics Are Associated to Their Microbial Community

Plant Volatiles of Lettuce and Chicory Cultivated in Aquaponics Are Associated to Their Microbial Community

The Growth of Leaf Lettuce and Bacterial Communities in a Closed Aquaponics System with Catfish

Challenges in achieving an economically sustainable aquaponic system: a review

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