Feed Your Friends: Do Plant Exudates Shape the Root Microbiome?

Sasse, Joëlle; Martinoia, Enrico; Northen, Trent

doi:10.1016/j.tplants.2017.09.003

Cited by 1,412 publications

(1,085 citation statements)

References 165 publications

(45 reference statements)

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“…Abiotic and biotic factors within a plant's local environment are known to alter its root exudate composition and concentration, thereby altering the soil microorganisms that are attracted to the rhizosphere (Chaparro et al 2012, Sasse et al 2018. This supports our hypothesis that abiotic factors drive the biotic filtering of endosymbionts and corroborates our in vivo hypothesis that the abiotic environment is the major environmental filter on the endosymbiont community.…”

Section: Discussionsupporting

confidence: 86%

Abiotic and biotic drivers of endosymbiont community assembly in Jatropha curcas

et al. 2019

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While the endosymbiotic communities recruited by plants are known to vary among host species and across environmental gradients, the drivers of community assembly remain poorly understood. We tested the hypothesis that establishment of an endosymbiotic bacterial community is driven primarily by the influence of the abiotic environment on biotic interactions between plant and soil bacteria. We planted sterile Jatropha curcas seedlings at three field sites in Panama and in a greenhouse with soil from those sites. After allowing sufficient time for endosymbiont colonization, we sequenced bacterial 16S rRNA to study the endophytic bacterial community in root and leaf tissue. We compared the communities between field and greenhouse plants and examined associations among the endosymbionts, the soil microbial community, and local abiotic factors. We found that endosymbiont richness and community composition varied between the greenhouse and field, despite plants being grown in the same soil. Plants in each field site harbored a distinct bacterial community, determined by soil microbes and select environmental variables, particularly major plant nutrients. Jatropha curcas can harbor a wide variety of endosymbiotic communities, and the composition of these communities is a product of the local environment. Fertility and agricultural practices may determine the fate of plant symbionts and therefore plant properties modulated through those symbionts.

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Section: Discussionsupporting

confidence: 86%

Abiotic and biotic drivers of endosymbiont community assembly in Jatropha curcas

et al. 2019

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“…Mucilage, defined by Sasse et al (2018) as a matrix of high-molecular-weight compounds, is secreted as a viscoelastic gel that is often polysacchariderich. Being sessile and unable to evade unfavourable conditions, their survival depends critically on their ability to sense their environment and, if possible, create favourable local conditions.…”

Section: Introductionmentioning

confidence: 99%

Sticky mucilages and exudates of plants: putative microenvironmental design elements with biotechnological value

2019

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Summary Plants produce a wide array of secretions both above and below ground. Known as mucilages or exudates, they are secreted by seeds, roots, leaves and stems and fulfil a variety of functions including adhesion, protection, nutrient acquisition and infection. Mucilages are generally polysaccharide‐rich and often occur in the form of viscoelastic gels and in many cases have adhesive properties. In some cases, progress is being made in understanding the structure–function relationships of mucilages such as for the secretions that allow growing ivy to attach to substrates and the biosynthesis and secretion of the mucilage compounds of the Arabidopsis seed coat. Work is just beginning towards understanding root mucilage and the proposed adhesive polymers involved in the formation of rhizosheaths at root surfaces and for the secretions involved in host plant infection by parasitic plants. In this article, we summarise knowledge on plant exudates and mucilages within the concept of their functions in microenvironmental design, focusing in particular on their bioadhesive functions and the molecules responsible for them. We draw attention to areas of future knowledge need, including the microstructure of mucilages and their compositional and regulatory dynamics.

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“…Eine mçgliche Rolle von Strigolactonen bei der Gestaltung des Wurzelmikrobioms wurde von vielen Gruppen vorgeschlagen, [22,72,73] und die jüngsten Fortschritte bei Sequenzierungstechniken und der Analyse werden mit Sicherheit zu neuen Erkenntnissen in diesem Bereich führen. Eine mçgliche Rolle von Strigolactonen bei der Gestaltung des Wurzelmikrobioms wurde von vielen Gruppen vorgeschlagen, [22,72,73] und die jüngsten Fortschritte bei Sequenzierungstechniken und der Analyse werden mit Sicherheit zu neuen Erkenntnissen in diesem Bereich führen.…”

Section: Angewandte Chemieunclassified

Strigolactone: Pflanzenhormone mit vielversprechenden Eigenschaften

et al. 2019

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Vor einigen Jahren, und damit fast 80 Jahre nach der Entdeckung des ersten Pflanzenhormons Auxin, wurde eine neue Klasse von Pflanzenhormonen – die Strigolactone – entdeckt. Diese Moleküle zeigen eine einzigartige biologische Aktivität in zahlreichen wichtigen biologischen Prozessen der Pflanzen, aber auch außerhalb von Pflanzen, nämlich in der Rhizosphäre, einer Erdschicht, die die Wurzeln umgibt und von Lebewesen wimmelt. Die Nutzung dieser erstaunlichen biologischen Aktivität ist nicht ohne Herausforderungen: Die Biosynthese von Strigolactonen ist kompliziert, und es ist schwierig, die erwünschte Aktivität zu konzipieren. Dieser Kurzaufsatz beschreibt den heutigen Stand der Wissenschaft im Bereich der Strigolactone und diskutiert, wie funktionelle Analoga entwickelt werden können, die möglicherweise zu einer nachhaltigen Landwirtschaft beitragen.

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Feed Your Friends: Do Plant Exudates Shape the Root Microbiome?

Cited by 1,412 publications

References 165 publications

Abiotic and biotic drivers of endosymbiont community assembly in Jatropha curcas

Abiotic and biotic drivers of endosymbiont community assembly in Jatropha curcas

Sticky mucilages and exudates of plants: putative microenvironmental design elements with biotechnological value

Strigolactone: Pflanzenhormone mit vielversprechenden Eigenschaften

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