Metabolic and transcriptomic signatures of rice floral organs reveal sugar starvation as a factor in reproductive failure under heat and drought stress

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dc.creatorLi, Xia
dc.creatorLawas, Lovely M. F.
dc.creatorMalo, Richard
dc.creatorGlaubitz, Ulrike
dc.creatorErban, Alexander
dc.creatorMauleon, Ramil
dc.creatorHeuer, Sigrid
dc.creatorZuther, Ellen
dc.creatorKopka, Joachim
dc.creatorHincha, Dirk K.
dc.creatorJagadish, Krishna S.V.
dc.date2015-10
dc.date2024-12-19T12:55:03Z
dc.date2024-12-19T12:55:03Z
dc.date.accessioned2026-06-27T04:13:50Z
dc.descriptionHeat and drought stress are projected to become major challenges to sustain rice (Oryza sativa L.) yields with global climate change. Both stresses lead to yield losses when they coincide with flowering. A significant knowledge gap exists in the mechanistic understanding of the responses of rice floral organs that determine reproductive success under stress. Our work connects the metabolomic and transcriptomic changes in anthers, pistils before pollination and pollinated pistils in a heat‐tolerant (N22) and a heat‐sensitive (Moroberekan) cultivar. Systematic analysis of the floral organs revealed contrasts in metabolic profiles across anthers and pistils. Constitutive metabolic markers were identified that can define reproductive success in rice under stress. Six out of nine candidate metabolites identified by intersection analysis of stressed anthers were differentially accumulated in N22 compared with Moroberekan under non‐stress conditions. Sugar metabolism was identified to be the crucial metabolic and transcriptional component that differentiated floral organ tolerance or susceptibility to stress. While susceptible Moroberekan specifically showed high expression of the Carbon Starved Anthers (CSA) gene under combined heat and drought, tolerant N22 responded with high expression of genes encoding a sugar transporter (MST8) and a cell wall invertase (INV4) as markers of high sink strength.
dc.identifierhttps://hdl.handle.net/10568/165413
dc.identifier.urihttp://hdl.handle.net/123456789/25882
dc.languageen
dc.publisherWiley
dc.sourceLi, X., Lawas, L.M.F., Malo, R., Glaubitz, U., Erban, A., Mauleon, R., Heuer, S., Zuther, E., Kopka, J., Hincha, D.K. and Jagadish, K.S.V. 2015. Metabolic and transcriptomic signatures of rice floral organs reveal sugar starvation as a factor in reproductive failure under heat and drought stress. Plant Cell and Environment, Volume 38 no. 10 p. 2171-2192
dc.subjectanthers
dc.subjectcell walls
dc.subjectclimatic change
dc.subjectdrought
dc.subjectdrought tolerance
dc.subjectflowering
dc.subjectfunctional genomics
dc.subjectgenes
dc.subjectlosses
dc.subjectmetabolism
dc.subjectplant physiology
dc.subjectreproduction
dc.subjectstress
dc.subjectvarieties
dc.subjectyields
dc.titleMetabolic and transcriptomic signatures of rice floral organs reveal sugar starvation as a factor in reproductive failure under heat and drought stress
dc.typeJournal Article

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Instituto Internacional de Investigación del Arroz (IRRI)