The aeroponic rhizosphere microbiome: community dynamics in early succession suggest strong selectional forces

Edmonds, Jennifer W.; Sackett, Joshua; Lomprey, Hunter; Hudson, Heather L; Moser, Duane P.

doi:10.1007/s10482-019-01319-y

Cited by 12 publications

(11 citation statements)

References 49 publications

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“…Studies on the rhizobiome in other type of cultivation systems such as soil or air have indicated a similar pattern of consolidation. For instance, Schreiter et al (2014) observed that the lettuce rhizobiome was consistent across varying soil types, while Edmonds et al (2020) observed a rhizobiome unique from the circulating nutrient solution that formed after 12 days of plant growth in aeroponic conditions ( Edmonds et al, 2020 ). This trend appears to be a hallmark of terrestrial plants ( Berg et al, 2014 ; Vandenkoornhuyse et al, 2015 ; Sasse et al, 2018 ; Zhalnina et al, 2018 ).…”

Section: Discussionmentioning

confidence: 99%

Plants Dictate Root Microbial Composition in Hydroponics and Aquaponics

2022

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The role of the microbial community in mediating fish and plant co-culture is often considered the black box of aquaponics. Despite widespread recognition regarding the dependency of plants on their rhizosphere, the extent to which upstream aquaculture influences downstream hydroponic root communities has been poorly described in the literature. In this study we performed a taxonomic survey (16S rRNA metabarcoding) of microbial communities originating in the facility water source, hydroponic nutrient solution (HNS) sump, nutrient supplemented biofilter effluent (BF) sump, and recirculating aquaculture system tanks stocked with Nile tilapia (Oreochromis niloticus). Lettuce (Lactuca sativa) was then grown using the HNS and BF effluent under sterilized or mature (prior aquaponics/hydroponics lettuce culture water) conditions, likewise, the influence of probiotic addition or inoculation with soil-grown lettuce rhizosphere was assessed. Compositional similarities across treatments suggest that under soil-less conditions, plants are able to exert a stronger discriminatory influence on their rhizosphere composition than is done by colonization from upstream sources. Furthermore, cluster dendrograms grouped the sterilized and unsterilized treatments more consistently together than hydroponics and aquaponics treatments. These findings contradict conventional beliefs that microbial communities in the water column colonize roots based on their presence alone, ignoring the role that plants play in rhizosphere community selection.

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Section: Discussionmentioning

confidence: 99%

Plants Dictate Root Microbial Composition in Hydroponics and Aquaponics

2022

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“…In one of the few non‐cultivation studies on root succession of MC, Edmonds et al. (2020) found an increase in copiotrophic phyla and an overall reduction in diversity as roots aged in aeroponic systems.…”

Section: Successionmentioning

confidence: 99%

Spatiotemporal patterns of rhizosphere microbiome assembly: From ecological theory to agricultural application

Muñoz-Ucros

Zwetsloot

Cuellar-Gempeler

et al. 2021

Journal of Applied Ecology

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There is urgency in optimizing agricultural production in light of climate uncertainty, human population growth and resource limitations. The rhizosphere microbiome is a promising genetic resource, yet it is poorly understood. Additionally, research into rhizosphere microbial community assembly (MCA) lacks a consistent ecological framework that incorporates the dynamics of the occurring interactions. We explore the ecological principles that guide community establishment as they pertain to the rhizosphere while reviewing relevant research and highlighting the gaps in knowledge. We propose a conceptual model for studying the rhizosphere, and argue for higher resolution characterizations of the rhizosphere, under a framework of root and microbial traits that will determine its resulting composition. For this, we borrow concepts from ecological theory to chronologically describe MCA as a function of colonization, distribution and succession under changing plant‐imposed filters. We argue that there is a need to consider the temporal and spatial scale of rhizosphere processes in a manner that is relevant to its microbial components. Finally, we discuss strategies for managing the rhizosphere microbiome for agriculture and the remaining gaps in knowledge that impede their application. Synthesis and applications. We aim to initiate a comprehensive conversation on ecological processes and plant and microbial traits that affect rhizosphere assembly. Rhizosphere microbiome research is relatively new and highly multidisciplinary. The use of a shared vocabulary and ecological theory will facilitate the development and advances in this discipline.

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“…3a). One recent study found that the root-associated microbial community of aeroponically grown Ó2020 The Authors New Phytologist Ó2020 New Phytologist Foundation New Phytologist (2020) 228: 1183-1192 www.newphytologist.com lettuce was dominated by proteobacteria and was distinct from microbial communities present on the germination trays or nutrient solution (Edmonds et al, 2020). Given that some bacterial species are unculturable after aerosol dispersion (Reponen et al, 1997;Dabisch et al, 2012;Zhen et al, 2013) and that each atomization method affects bacterial membrane integrity and cell survival differently (Fernandez et al, 2019), more extensive characterization of microbial communities at the root-aerosol interface and within the nutrient solution will be informative.…”

Section: Root Exudation and Microbial Interactions During Aeroponic Cmentioning

confidence: 99%

Getting to the roots of aeroponic indoor farming

Eldridge

Manzoni²,

Graham

et al. 2020

New Phytologist

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Vertical farming is a type of indoor agriculture where plants are cultivated in stacked systems. It forms a rapidly growing sector with new emerging technologies. Indoor farms often use soil-free techniques such as hydroponics and aeroponics. Aeroponics involves the application to roots of a nutrient aerosol, which can lead to greater plant productivity than hydroponic cultivation. Aeroponics is thought to resolve a variety of plant physiological constraints that occur within hydroponic systems. We synthesize existing studies of the physiology and development of crops cultivated under aeroponic conditions and identify key knowledge gaps. We identify future research areas to accelerate the sustainable intensification of vertical farming using aeroponic systems.

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The aeroponic rhizosphere microbiome: community dynamics in early succession suggest strong selectional forces

Cited by 12 publications

References 49 publications

Plants Dictate Root Microbial Composition in Hydroponics and Aquaponics

Plants Dictate Root Microbial Composition in Hydroponics and Aquaponics

Spatiotemporal patterns of rhizosphere microbiome assembly: From ecological theory to agricultural application

Getting to the roots of aeroponic indoor farming

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