Please use this identifier to cite or link to this item: http://223.31.159.10:8080/jspui/handle/123456789/1166
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dc.contributor.authorMathan, Jyotirmaya-
dc.contributor.authorSingh, Anuradha-
dc.contributor.authorRanjan, Aashish-
dc.date.accessioned2021-02-17T06:33:51Z-
dc.date.available2021-02-17T06:33:51Z-
dc.date.issued2021-
dc.identifier.citationJournal of Experimental Botany, 72(12): 4355-4372en_US
dc.identifier.issn1460-2431-
dc.identifier.otherhttps://doi.org/10.1093/jxb/erab066-
dc.identifier.urihttps://academic.oup.com/jxb/advance-article/doi/10.1093/jxb/erab066/6137265-
dc.identifier.urihttp://223.31.159.10:8080/jspui/handle/123456789/1166-
dc.descriptionAccepted date: 15 February 2021en_US
dc.description.abstractThe source-sink relationship is key to overall crop performance. Detailed understanding of the factors that determine source-sink dynamics is imperative for the balance of biomass and grain yield in crop plants. We investigated the differences in the source-sink relationship between a cultivated rice Oryza sativa cv. Nipponbare and a wild rice Oryza australiensis that show striking differences in biomass and grain yield. Oryza australiensis, accumulating higher biomass, not only showed higher photosynthesis per unit leaf area but also exported more sucrose from leaves than Nipponbare. However, grain features and sugar levels suggested limited sucrose mobilization to the grains in the wild rice due to vasculature and sucrose transporter functions. Low cell wall invertase activity and high sucrose synthase cleavage activity followed by higher expression of cellulose synthase genes in Oryza australiensis stem utilized photosynthates preferentially for the synthesis of structural carbohydrates, resulting in high biomass. In contrast, the source-sink relationship favored high grain yield in Nipponbare via accumulation of transitory starch in the stem, due to higher expression of starch biosynthetic genes, which is mobilized to panicles at the grain filling stage. Thus, vascular features, sucrose transport, and functions of sugar metabolic enzymes explained the differences in the source-sink relationship between Nipponbare and Oryza australiensis.en_US
dc.description.sponsorshipThis work was supported by the Innovative Young Biotechnologist Award (BT/09/IYBA/2015/01) and Ramalingaswamy Re-entry Fellowship (BT/RLF/reentry/05/2013) to AR from the Department of Biotechnology, Ministry of Science and Technology, India. JM and AS acknowledge their CSIR-JRF and SERB-NPDF fellowships, respectively. We also acknowledge Central Instrument Facility, NIPGR; Advanced Instrumentation Research Facility, JNU; Confocal Microscopy Facility, NIPGR; and DBTeLibrary Consortium (DeLCON) for providing access to e-resources.en_US
dc.language.isoen_USen_US
dc.publisherOxford University Pressen_US
dc.subjectBiomassen_US
dc.subjectGrain yielden_US
dc.subjectPhotosynthesisen_US
dc.subjectSource-sink relationshipen_US
dc.subjectStarchen_US
dc.subjectStructural carbohydratesen_US
dc.subjectSucrose synthaseen_US
dc.subjectSucrose transporten_US
dc.subjectVascular featuresen_US
dc.titleSucrose transport and metabolism control carbon partitioning between stem and grain in riceen_US
dc.typeArticleen_US
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