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2018-03-07Zeitschriftenartikel DOI: 10.3389/fpls.2018.00301
Arbuscular Mycorrhiza Improves Substrate Hydraulic Conductivity in the Plant Available Moisture Range Under Root Growth Exclusion
dc.contributor.authorBitterlich, Michael
dc.contributor.authorFranken, Philipp
dc.contributor.authorGraefe, Jan
dc.date.accessioned2020-02-13T09:05:37Z
dc.date.available2020-02-13T09:05:37Z
dc.date.issued2018-03-07none
dc.date.updated2019-10-21T20:41:24Z
dc.identifier.urihttp://edoc.hu-berlin.de/18452/21881
dc.description.abstractArbuscular mycorrhizal fungi (AMF) proliferate in soils and are known to affect soil structure. Although their contribution to structure is extensively investigated, the consequences of those processes for soil water extractability and transport has, so far, gained surprisingly little attention. Therefore we asked, whether AMF can affect water retention and unsaturated hydraulic conductivity under exclusion of root ingrowth, in order to minimize plant driven effects. We carried out experiments with tomato inoculated with Rhizoglomus irregulare in a soil substrate with sand and vermiculite that created variation in colonization by mixed pots with wild type (WT) plants and mycorrhiza resistant (RMC) mutants. Sampling cores were introduced and used to assess substrate moisture retention dynamics and modeling of substrate water retention and hydraulic conductivity. AMF reduced the saturated water content and total porosity, but maintained air filled porosity in soil spheres that excluded root ingrowth. The water content between field capacity and the permanent wilting point (6–1500 kPa) was only reduced in mycorrhizal substrates that contained at least one RMC mutant. Plant available water contents correlated positively with soil protein contents. Soil protein contents were highest in pots that possessed the strongest hyphal colonization, but not significantly affected. Substrate conductivity increased up to 50% in colonized substrates in the physiologically important water potential range between 6 and 10 kPa. The improvements in hydraulic conductivity are restricted to substrates where at least one WT plant was available for the fungus, indicating a necessity of a functional symbiosis for this effect. We conclude that functional mycorrhiza alleviates the resistance to water movement through the substrate in substrate areas outside of the root zone.eng
dc.language.isoengnone
dc.publisherHumboldt-Universität zu Berlin
dc.rights(CC BY 4.0) Attribution 4.0 Internationalger
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectarbuscular mycorrhizaeng
dc.subjectunsaturated hydraulic conductivityeng
dc.subjectwater retentioneng
dc.subjectsubstrateeng
dc.subjectsoil water potentialeng
dc.subject.ddc570 Biologienone
dc.titleArbuscular Mycorrhiza Improves Substrate Hydraulic Conductivity in the Plant Available Moisture Range Under Root Growth Exclusionnone
dc.typearticle
dc.identifier.urnurn:nbn:de:kobv:11-110-18452/21881-2
dc.identifier.doi10.3389/fpls.2018.00301none
dc.identifier.doihttp://dx.doi.org/10.18452/21133
dc.type.versionpublishedVersionnone
local.edoc.container-titleFrontiers in Plant Sciencenone
local.edoc.pages11none
local.edoc.type-nameZeitschriftenartikel
local.edoc.institutionLebenswissenschaftliche Fakultätnone
local.edoc.container-typeperiodical
local.edoc.container-type-nameZeitschrift
local.edoc.container-publisher-nameFrontiers Media S.A.none
local.edoc.container-publisher-placeLausannenone
local.edoc.container-volume9none
dc.description.versionPeer Reviewednone
local.edoc.container-articlenumber301none
dc.identifier.eissn1664-462X
local.edoc.affiliationBitterlich, Michael; Leibniz Institute of Vegetable and Ornamental Crops, Großbeeren, Germanynone
local.edoc.affiliationFranken, Philipp; Leibniz Institute of Vegetable and Ornamental Crops, Großbeeren, Germany; The Department of Plant Physiology, Humboldt University of Berlin, Berlin, Germanynone
local.edoc.affiliationGraefe, Jan; Leibniz Institute of Vegetable and Ornamental Crops, Großbeeren, Germanynone

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