Vegetative and reproductive growth of salt-stressed chickpea are carbon-limited: sucrose infusion at the reproductive stage improves salt tolerance

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dc.contributor.authorKhan, Hammad
dc.contributor.authorSiddique, Kadambot H.M.
dc.contributor.authorColmer, T D
dc.date.accessioned2021-10-12T23:28:41Z
dc.date.available2021-10-12T23:28:41Z
dc.date.issued2017
dc.date.updated2020-11-23T11:26:27Z
dc.description.abstractReproductive processes of chickpea (Cicer arietinum L.) are particularly sensitive to salinity. We tested whether limited photoassimilate availability contributes to reproductive failure in salt-stressed chickpea. Rupali, a salt-sensitive genotype, was grown in aerated nutrient solution, either with non-saline (control) or 30mM NaCl treatment. At flowering, stems were either infused with sucrose solution (0.44M), water only or maintained without any infusion, for 75 d. The sucrose and water infusion treatments of non-saline plants had no effect on growth or yield, but photosynthesis declined in response to sucrose infusion. Salt stress reduced photosynthesis, decreased tissue sugars by 22-47%, and vegetative and reproductive growth were severely impaired. Sucrose infusion of salt-treated plants increased total sugars in stems, leaves and developing pods, to levels similar to those of non-saline plants. In salt-stressed plants, sucrose infusion increased dry mass (2.6-fold), pod numbers (3.8-fold), seed numbers (6.5-fold) and seed yield (10.4-fold), yet vegetative growth and reproductive failure were not rescued completely by sucrose infusion. Sucrose infusion partly rescued reproductive failure in chickpea by increasing vegetative growth enabling more flower production and by providing sucrose for pod and seed growth. We conclude that insuffcient assimilate availability limits yield in salt-stressed chickpea.en_AU
dc.description.sponsorshipThe work was financially supported by the Australia–India Strategic Research Fund Grand Challenge Project (Project GCF010013) of the Australian Government Department of Industry. HAK received an Endeavour Postgraduate Award from the Australian Government and some operating funds from the School of Plant Biology at The University of Western Australia.en_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn0022-0957en_AU
dc.identifier.urihttp://hdl.handle.net/1885/250762
dc.language.isoen_AUen_AU
dc.provenanceThis is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.en_AU
dc.publisherOxford University Pressen_AU
dc.rights© The Author 2016. Published by Oxford University Press on behalf of the Society for Experimental Biologyen_AU
dc.rights.licenseCreative Commons Attribution 4.0 International Licenseen_AU
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_AU
dc.sourceJournal of Experimental Botanyen_AU
dc.subjectChickpea (Cicer arietinum L.)en_AU
dc.subjectfloweringen_AU
dc.subjectphotosynthate supply and demanden_AU
dc.subjectphotosynthesisen_AU
dc.subjectplant sucrose infusionen_AU
dc.subjectpoddingen_AU
dc.subjectsalinity stressen_AU
dc.subjectseed growthen_AU
dc.subjecttissue ionsen_AU
dc.subjecttissue sugarsen_AU
dc.titleVegetative and reproductive growth of salt-stressed chickpea are carbon-limited: sucrose infusion at the reproductive stage improves salt toleranceen_AU
dc.typeJournal articleen_AU
dcterms.accessRightsOpen Accessen_AU
local.bibliographicCitation.issue8en_AU
local.bibliographicCitation.lastpage2011en_AU
local.bibliographicCitation.startpage2001en_AU
local.contributor.affiliationKhan, Hammad, College of Science, ANUen_AU
local.contributor.affiliationSiddique, Kadambot H.M. , The University of Western Australiaen_AU
local.contributor.affiliationColmer, T D, University of Western Australiaen_AU
local.contributor.authoremailu1038898@anu.edu.auen_AU
local.contributor.authoruidKhan, Hammad, u1038898en_AU
local.description.notesImported from ARIESen_AU
local.identifier.absfor060705 - Plant Physiologyen_AU
local.identifier.absseo820503 - Grain Legumesen_AU
local.identifier.ariespublicationa383154xPUB6763en_AU
local.identifier.citationvolume68en_AU
local.identifier.doi10.1093/jxb/erw177en_AU
local.identifier.scopusID2-s2.0-85020273875
local.identifier.thomsonID000402059000016
local.identifier.uidSubmittedBya383154en_AU
local.publisher.urlhttp://www.oxfordjournals.org/our_journals/exbotj/openaccess.htmlen_AU
local.type.statusPublished Versionen_AU

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