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dc.contributor.authorVandenbrink, Joshua P.es_ES
dc.contributor.authorHerranz, Raúles_ES
dc.contributor.authorMedina, F. Javieres_ES
dc.contributor.authorEdelmann, Richard E.es_ES
dc.contributor.authorKiss, John Z.es_ES
dc.date.accessioned2016-08-31T12:40:12Z-
dc.date.available2016-08-31T12:40:12Z-
dc.date.issued2016-08-09-
dc.identifier.citationPlanta. 2016es_ES
dc.identifier.issn0032-0935-
dc.identifier.urihttp://hdl.handle.net/10261/136179-
dc.description45 p.-9 fig.-3 tab.4 tab.Supl.-2 fig. supl.es_ES
dc.description.abstractDue to their sessile nature, plants utilize environmental cues to grow and respond to their surroundings. Two of these cues, light and gravity, play a substantial role in plant orientation and directed growth movements (tropisms). However, very little is currently known about the interaction between light- (phototropic) and gravity (gravitropic)-mediated growth responses. Utilizing the European Modular Cultivation System on board the International Space Station, we investigated the interaction between phototropic and gravitropic responses in three Arabidopsis thaliana genotypes, Landsberg wild type, as well as mutants of phytochrome A and phytochrome B. Onboard centrifuges were used to create a fractional gravity gradient ranging from reduced gravity up to 1g. A novel positive blue-light phototropic response of roots was observed during conditions of microgravity, and this response was attenuated at 0.1g. In addition, a red-light pretreatment of plants enhanced the magnitude of positive phototropic curvature of roots in response to blue illumination. In addition, a positive phototropic response of roots was observed when exposed to red light, and a decrease in response was gradual and correlated with the increase in gravity. The positive red-light phototropic curvature of hypocotyls when exposed to red light was also confirmed. Both red-light and blue-light phototropic responses were also shown to be affected by directional light intensity. To our knowledge, this is the first characterization of a positive blue-light phototropic response in Arabidopsis roots, as well as the first description of the relationship between these phototropic responses in fractional or reduced gravities.es_ES
dc.description.sponsorshipFunding for this study was provided by NASA Grant NNX12A065G, and we would like to acknowledge the fine support of NASA’s Ames Research Center.es_ES
dc.language.isoenges_ES
dc.publisherSpringer Naturees_ES
dc.relation.isversionofPostprintes_ES
dc.rightsopenAccessen_EN
dc.subjectArabidopsises_ES
dc.subjectFractional Gravityes_ES
dc.subjectMicrogravityes_ES
dc.subjectPhototropismes_ES
dc.subjectReduced Gravityes_ES
dc.subjectSpaceflightes_ES
dc.titleA novel blue-light phototropic response is revealed in roots of Arabidopsis thaliana in microgravityes_ES
dc.title.alternativeThe effects of microgravity on phototropismes_ES
dc.typeartículoes_ES
dc.identifier.doi10.1007/s00425-016-2581-8-
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://dx.doi.org/ 10.1007/s00425-016-2581-8es_ES
dc.identifier.e-issn1432-2048-
dc.embargo.terms2017-08-09es_ES
dc.contributor.funderNASA Astrobiology Institute (US)es_ES
dc.relation.csices_ES
oprm.item.hasRevisionno ko 0 false*
dc.identifier.pmid27507239-
dc.type.coarhttp://purl.org/coar/resource_type/c_6501es_ES
item.openairetypeartículo-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
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