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dc.contributor.authorBouray, Moussa
dc.contributor.authorMoir, James
dc.contributor.authorLehto, Niklas
dc.contributor.authorCondron, Leo
dc.contributor.authorTouhami, Driss
dc.contributor.authorHummel, C
dc.date.accessioned2021-10-26T22:04:18Z
dc.date.available2021-10-14
dc.date.issued2021-12
dc.date.submitted2021-10-04
dc.identifier.issn0032-079X
dc.identifier.urihttps://hdl.handle.net/10182/14321
dc.description.abstractPurpose Increasing the pH of acid soils is a well-recognized means of improving their fertility; however, the effects that plants impose on rhizosphere soils in response to this change are not well understood. This research sought to investigate changes in phosphorus (P) availability in the rhizosphere of blue lupin (Lupinus angustifolius) in response to an increase in pH. Methods Blue lupin plants were grown in rhizoboxes using two contrasting acid soils at their native pH (5.3 and 4.7) and treated with lime to increase their pH to 6.3 in a replicated trial. Measurements of localized acid phosphomonoesterase activity and P flux were made next to lateral root segments using a combination of zymography and diffusive gradient in thin films (DGT). Rhizosphere and bulk soils were tested for pH, organic anions, exchangeable aluminium (Al), labile P and phosphomonoesterase activity. Root morphological traits, root and shoot yields and shoot nutrient concentrations were also recorded. Results Profiles of DGT-P fluxes across lateral roots showed mobilization of P in the soil with the higher organic P content, and depletion in the other. The extent of acid phosphomonoesterase activity in the rhizosphere decreased with soil pH increase. Shoot P uptake was strongly correlated with fine root length and total organic anions in the rhizosphere. The proportion of thin roots decreased at pH 6.3 compared to the native pH, whereas that of thick roots increased. Conclusion Soil pH increase to 6.3 using lime negatively affects the P acquisition by blue lupin due to the reduction of organic anion exudation, fine root length and the extent of acid phosphomonoesterase activity in the rhizosphere.
dc.format.extentpp.387-407
dc.languageen
dc.language.isoen
dc.publisherSpringer Nature
dc.relationThe original publication is available from Springer Nature - https://doi.org/10.1007/s11104-021-05177-4
dc.relation.urihttps://doi.org/10.1007/s11104-021-05177-4
dc.subjectblue lupin
dc.subjectdiffusive gradient in thin films
dc.subjectfine root
dc.subjectorganic anions
dc.subjectphosphorus uptake
dc.subjectzymography
dc.titleSoil pH effects on phosphorus mobilization in the rhizosphere of Lupinus angustifolius
dc.typeJournal Article
lu.contributor.unitLincoln University
lu.contributor.unitFaculty of Agriculture and Life Sciences
lu.contributor.unitDepartment of Soil and Physical Sciences
lu.contributor.unit|LU|Research Management Office|PE20
dc.identifier.doi10.1007/s11104-021-05177-4
dc.relation.isPartOfPlant and Soil
pubs.issue1-2
pubs.organisational-group|LU
pubs.organisational-group|LU|Agriculture and Life Sciences
pubs.organisational-group|LU|Agriculture and Life Sciences|SOILS
pubs.organisational-group|LU|Research Management Office
pubs.organisational-group|LU|Research Management Office|QE18
pubs.organisational-group|LU|Research Management Office|PE20
pubs.publication-statusPublished
pubs.volume469
dc.identifier.eissn1573-5036
lu.identifier.orcid0000-0002-9440-7121
lu.identifier.orcid0000-0001-6677-3901
lu.identifier.orcid0000-0001-8563-2469
lu.identifier.orcid0000-0002-3082-994X
lu.identifier.orcid0000-0001-5860-7970


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