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Lettuce (Lactuca sativa) productivity influenced by microbial inocula under nitrogen-limited conditions in aquaponics

The demand for food will outpace productivity of conventional agriculture due to projected growth of the human population, concomitant with shrinkage of arable land, increasing scarcity of freshwater, and a rapidly changing climate. While aquaponics has potential to sustainably supplement food produ...

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Autores principales: Day, Jessica A., Diener, Christian, Otwell, Anne E., Tams, Kourtney E., Bebout, Brad, Detweiler, Angela M., Lee, Michael D., Scott, Madeline T., Ta, Wilson, Ha, Monica, Carreon, Shienna A., Tong, Kenny, Ali, Abdirizak A., Gibbons, Sean M., Baliga, Nitin S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7901782/
https://www.ncbi.nlm.nih.gov/pubmed/33621265
http://dx.doi.org/10.1371/journal.pone.0247534
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author Day, Jessica A.
Diener, Christian
Otwell, Anne E.
Tams, Kourtney E.
Bebout, Brad
Detweiler, Angela M.
Lee, Michael D.
Scott, Madeline T.
Ta, Wilson
Ha, Monica
Carreon, Shienna A.
Tong, Kenny
Ali, Abdirizak A.
Gibbons, Sean M.
Baliga, Nitin S.
author_facet Day, Jessica A.
Diener, Christian
Otwell, Anne E.
Tams, Kourtney E.
Bebout, Brad
Detweiler, Angela M.
Lee, Michael D.
Scott, Madeline T.
Ta, Wilson
Ha, Monica
Carreon, Shienna A.
Tong, Kenny
Ali, Abdirizak A.
Gibbons, Sean M.
Baliga, Nitin S.
author_sort Day, Jessica A.
collection PubMed
description The demand for food will outpace productivity of conventional agriculture due to projected growth of the human population, concomitant with shrinkage of arable land, increasing scarcity of freshwater, and a rapidly changing climate. While aquaponics has potential to sustainably supplement food production with minimal environmental impact, there is a need to better characterize the complex interplay between the various components (fish, plant, microbiome) of these systems to optimize scale up and productivity. Here, we investigated how the commonly-implemented practice of continued microbial community transfer from pre-existing systems might promote or impede productivity of aquaponics. Specifically, we monitored plant growth phenotypes, water chemistry, and microbiome composition of rhizospheres, biofilters, and fish feces over 61-days of lettuce (Lactuca sativa var. crispa) growth in nitrogen-limited aquaponic systems inoculated with bacteria that were either commercially sourced or originating from a pre-existing aquaponic system. Lettuce above- and below-ground growth were significantly reduced across replicates treated with a pre-existing aquaponic system inoculum when compared to replicates treated with a commercial inoculum. Reduced productivity was associated with enrichment in specific bacterial genera in plant roots, including Pseudomonas, following inoculum transfer from pre-existing systems. Increased productivity was associated with enrichment of nitrogen-fixing Rahnella in roots of plants treated with the commercial inoculum. Thus, we show that inoculation from a pre-existing system, rather than from a commercial inoculum, is associated with lower yields. Further work will be necessary to test the putative mechanisms involved.
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spelling pubmed-79017822021-03-02 Lettuce (Lactuca sativa) productivity influenced by microbial inocula under nitrogen-limited conditions in aquaponics Day, Jessica A. Diener, Christian Otwell, Anne E. Tams, Kourtney E. Bebout, Brad Detweiler, Angela M. Lee, Michael D. Scott, Madeline T. Ta, Wilson Ha, Monica Carreon, Shienna A. Tong, Kenny Ali, Abdirizak A. Gibbons, Sean M. Baliga, Nitin S. PLoS One Research Article The demand for food will outpace productivity of conventional agriculture due to projected growth of the human population, concomitant with shrinkage of arable land, increasing scarcity of freshwater, and a rapidly changing climate. While aquaponics has potential to sustainably supplement food production with minimal environmental impact, there is a need to better characterize the complex interplay between the various components (fish, plant, microbiome) of these systems to optimize scale up and productivity. Here, we investigated how the commonly-implemented practice of continued microbial community transfer from pre-existing systems might promote or impede productivity of aquaponics. Specifically, we monitored plant growth phenotypes, water chemistry, and microbiome composition of rhizospheres, biofilters, and fish feces over 61-days of lettuce (Lactuca sativa var. crispa) growth in nitrogen-limited aquaponic systems inoculated with bacteria that were either commercially sourced or originating from a pre-existing aquaponic system. Lettuce above- and below-ground growth were significantly reduced across replicates treated with a pre-existing aquaponic system inoculum when compared to replicates treated with a commercial inoculum. Reduced productivity was associated with enrichment in specific bacterial genera in plant roots, including Pseudomonas, following inoculum transfer from pre-existing systems. Increased productivity was associated with enrichment of nitrogen-fixing Rahnella in roots of plants treated with the commercial inoculum. Thus, we show that inoculation from a pre-existing system, rather than from a commercial inoculum, is associated with lower yields. Further work will be necessary to test the putative mechanisms involved. Public Library of Science 2021-02-23 /pmc/articles/PMC7901782/ /pubmed/33621265 http://dx.doi.org/10.1371/journal.pone.0247534 Text en https://creativecommons.org/publicdomain/zero/1.0/ This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 (https://creativecommons.org/publicdomain/zero/1.0/) public domain dedication.
spellingShingle Research Article
Day, Jessica A.
Diener, Christian
Otwell, Anne E.
Tams, Kourtney E.
Bebout, Brad
Detweiler, Angela M.
Lee, Michael D.
Scott, Madeline T.
Ta, Wilson
Ha, Monica
Carreon, Shienna A.
Tong, Kenny
Ali, Abdirizak A.
Gibbons, Sean M.
Baliga, Nitin S.
Lettuce (Lactuca sativa) productivity influenced by microbial inocula under nitrogen-limited conditions in aquaponics
title Lettuce (Lactuca sativa) productivity influenced by microbial inocula under nitrogen-limited conditions in aquaponics
title_full Lettuce (Lactuca sativa) productivity influenced by microbial inocula under nitrogen-limited conditions in aquaponics
title_fullStr Lettuce (Lactuca sativa) productivity influenced by microbial inocula under nitrogen-limited conditions in aquaponics
title_full_unstemmed Lettuce (Lactuca sativa) productivity influenced by microbial inocula under nitrogen-limited conditions in aquaponics
title_short Lettuce (Lactuca sativa) productivity influenced by microbial inocula under nitrogen-limited conditions in aquaponics
title_sort lettuce (lactuca sativa) productivity influenced by microbial inocula under nitrogen-limited conditions in aquaponics
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7901782/
https://www.ncbi.nlm.nih.gov/pubmed/33621265
http://dx.doi.org/10.1371/journal.pone.0247534
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