Phosphate-dependent root system architecture responses to salt stress

Handle URI:
http://hdl.handle.net/10754/618039
Title:
Phosphate-dependent root system architecture responses to salt stress
Authors:
Kawa, Dorota; Julkowska, Magdalena; Montero Sommerfeld, Hector; Horst, Anneliek ter; Haring, Michel A; Testerink, Christa
Abstract:
Nutrient availability and salinity of the soil affect growth and development of plant roots. Here, we describe how phosphate availability affects root system architecture (RSA) of Arabidopsis and how phosphate levels modulate responses of the root to salt stress. Phosphate (Pi) starvation reduced main root length and increased the number of lateral roots of Arabidopsis Col-0 seedlings. In combination with salt, low Pi dampened the inhibiting effect of mild salt stress (75mM) on all measured RSA components. At higher NaCl concentrations, the Pi deprivation response prevailed over the salt stress only for lateral root elongation. The Pi deprivation response of lateral roots appeared to be oppositely affected by abscisic acid (ABA) signaling compared to the salt stress response. Natural variation in the response to the combination treatment of salt and Pi starvation within 330 Arabidopsis accessions could be grouped into four response patterns. When exposed to double stress, in general lateral roots prioritized responses to salt, while the effect on main root traits was additive. Interestingly, these patterns were not identical for all accessions studied and multiple strategies to integrate the signals from Pi deprivation and salinity were identified. By Genome Wide Association Mapping (GWAS) 13 genomic loci were identified as putative factors integrating responses to salt stress and Pi starvation. From our experiments, we conclude that Pi starvation interferes with salt responses mainly at the level of lateral roots and that large natural variation exists in the available genetic repertoire of accessions to handle the combination of stresses.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division
Citation:
Phosphate-dependent root system architecture responses to salt stress 2016:pp.00712.2016 Plant Physiology
Publisher:
American Society of Plant Biologists (ASPB)
Journal:
Plant Physiology
Issue Date:
20-May-2016
DOI:
10.1104/pp.16.00712
Type:
Article
ISSN:
0032-0889; 1532-2548
Sponsors:
This work was supported by the Netherlands Organisation for Scientific Research (NWO-NSFC project ALW 846.11.002) and STW Perspectief 10987.
Additional Links:
http://www.plantphysiol.org/lookup/doi/10.1104/pp.16.00712
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorKawa, Dorotaen
dc.contributor.authorJulkowska, Magdalenaen
dc.contributor.authorMontero Sommerfeld, Hectoren
dc.contributor.authorHorst, Anneliek teren
dc.contributor.authorHaring, Michel Aen
dc.contributor.authorTesterink, Christaen
dc.date.accessioned2016-08-08T10:44:46Z-
dc.date.available2016-08-08T10:44:46Z-
dc.date.issued2016-05-20-
dc.identifier.citationPhosphate-dependent root system architecture responses to salt stress 2016:pp.00712.2016 Plant Physiologyen
dc.identifier.issn0032-0889-
dc.identifier.issn1532-2548-
dc.identifier.doi10.1104/pp.16.00712-
dc.identifier.urihttp://hdl.handle.net/10754/618039-
dc.description.abstractNutrient availability and salinity of the soil affect growth and development of plant roots. Here, we describe how phosphate availability affects root system architecture (RSA) of Arabidopsis and how phosphate levels modulate responses of the root to salt stress. Phosphate (Pi) starvation reduced main root length and increased the number of lateral roots of Arabidopsis Col-0 seedlings. In combination with salt, low Pi dampened the inhibiting effect of mild salt stress (75mM) on all measured RSA components. At higher NaCl concentrations, the Pi deprivation response prevailed over the salt stress only for lateral root elongation. The Pi deprivation response of lateral roots appeared to be oppositely affected by abscisic acid (ABA) signaling compared to the salt stress response. Natural variation in the response to the combination treatment of salt and Pi starvation within 330 Arabidopsis accessions could be grouped into four response patterns. When exposed to double stress, in general lateral roots prioritized responses to salt, while the effect on main root traits was additive. Interestingly, these patterns were not identical for all accessions studied and multiple strategies to integrate the signals from Pi deprivation and salinity were identified. By Genome Wide Association Mapping (GWAS) 13 genomic loci were identified as putative factors integrating responses to salt stress and Pi starvation. From our experiments, we conclude that Pi starvation interferes with salt responses mainly at the level of lateral roots and that large natural variation exists in the available genetic repertoire of accessions to handle the combination of stresses.en
dc.description.sponsorshipThis work was supported by the Netherlands Organisation for Scientific Research (NWO-NSFC project ALW 846.11.002) and STW Perspectief 10987.en
dc.language.isoenen
dc.publisherAmerican Society of Plant Biologists (ASPB)en
dc.relation.urlhttp://www.plantphysiol.org/lookup/doi/10.1104/pp.16.00712en
dc.rightsArchived with thanks to Plant Physiologyen
dc.titlePhosphate-dependent root system architecture responses to salt stressen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalPlant Physiologyen
dc.eprint.versionPost-printen
dc.contributor.institutionUniversity of Amsterdam, Swammerdam Institute for Life Sciences, Plant Cell Biology, Postbus 94215, 1098GE Amsterdam, the Netherlandsen
dc.contributor.institutionUniversity of Amsterdam, Swammerdam Institute for Life Sciences, Plant Physiology, Postbus 94215, 1098GE Amsterdam, the Netherlandsen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorJulkowska, Magdalenaen
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