Phosphorus remobilization from rice flag leaves during grain filling: an RNA-seq study

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dc.creatorJeong, Kwanho
dc.creatorBaten, Abdul
dc.creatorWaters, Daniel L. E.
dc.creatorPantoja, Omar
dc.creatorJulia, Cecile C.
dc.creatorWissuwa, Matthias
dc.creatorHeuer, Sigrid
dc.creatorKretzschmar, Tobias
dc.creatorRose, Terry J.
dc.date2017-01
dc.date2024-12-19T12:54:50Z
dc.date2024-12-19T12:54:50Z
dc.date.accessioned2026-06-27T04:14:28Z
dc.descriptionThe physiology and molecular regulation of phosphorus (P) remobilization from vegetative tissues to grains during grain filling is poorly understood, despite the pivotal role it plays in the global P cycle. To test the hypothesis that a subset of genes involved in the P starvation response are involved in remobilization of P from flag leaves to developing grains, we conducted an RNA‐seq analysis of rice flag leaves during the preremobilization phase (6 DAA) and when the leaves were acting as a P source (15 DAA). Several genes that respond to phosphate starvation, including three purple acid phosphatases (OsPAP3, OsPAP9b and OsPAP10a), were significantly up‐regulated at 15 DAA, consistent with a role in remobilization of P from flag leaves during grain filling. A number of genes that have not been implicated in the phosphate starvation response, OsPAP26, SPX‐MFS1 (a putative P transporter) and SPX‐MFS2, also showed expression profiles consistent with involvement in P remobilization from senescing flag leaves. Metabolic pathway analysis using the KEGG system suggested plastid membrane lipid synthesis is a critical process during the P remobilization phase. In particular, the up‐regulation of OsPLDz2 and OsSQD2 at 15 DAA suggested phospholipids were being degraded and replaced by other lipids to enable continued cellular function while liberating P for export to developing grains. Three genes associated with RNA degradation that have not previously been implicated in the P starvation response also showed expression profiles consistent with a role in P mobilization from senescing flag leaves.
dc.identifierhttps://hdl.handle.net/10568/165239
dc.identifier.urihttp://hdl.handle.net/123456789/26224
dc.languageen
dc.publisherWiley
dc.rightsOpen Access
dc.sourceJeong, Kwanho; Baten, Abdul; Waters, Daniel L. E.; Pantoja, Omar; Julia, Cecile C.; Wissuwa, Matthias; Heuer, Sigrid; Kretzschmar, Tobias and Rose, Terry J. 2017. Phosphorus remobilization from rice flag leaves during grain filling: an RNA-seq study. Plant Biotechnology Journal, Volume 15 no. 1 p. 15-26
dc.titlePhosphorus remobilization from rice flag leaves during grain filling: an RNA-seq study
dc.typeJournal Article

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Instituto Internacional de Investigación del Arroz (IRRI)