Metabolic and transcriptional transitions in barley glumes reveal a role as transitory resource buffers during endosperm filling

© The Author 2015. Published by Oxford University Press on behalf of the Society for Experimental Biology.

Bibliographische Detailangaben
Veröffentlicht in:Journal of experimental botany. - 1985. - 66(2015), 5 vom: 15. März, Seite 1397-411
1. Verfasser: Kohl, Stefan (VerfasserIn)
Weitere Verfasser: Hollmann, Julien, Erban, Alexander, Kopka, Joachim, Riewe, David, Weschke, Winfriede, Weber, Hans
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2015
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Journal Article Research Support, Non-U.S. Gov't ABA N transport NAC transcription factors WRKY transcription factors. barley (Hordeum vulgare L. cv. Barke) glumes jasmonic acid nitrogen (N) remobilization mehr... seed development Plant Proteins Transcription Factors Abscisic Acid 72S9A8J5GW
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520 |a © The Author 2015. Published by Oxford University Press on behalf of the Society for Experimental Biology. 
520 |a During grain filling in barley (Hordeum vulgare L. cv. Barke) reserves are remobilized from vegetative organs. Glumes represent the vegetative tissues closest to grains, senesce late, and are involved in the conversion of assimilates. To analyse glume development and metabolism related to grain filling, parallel transcript and metabolite profiling in glumes and endosperm were performed, showing that glume metabolism and development adjusts to changing grain demands, reflected by specific signatures of metabolite and transcript abundances. Before high endosperm sink strength is established by storage product accumulation, glumes form early, intermediary sink organs, shifting then to remobilizing and exporting source organs. Metabolic and transcriptional transitions occur at two phases: first, at the onset of endosperm filling, as a consequence of endosperm sink activity and assimilate depletion in endosperm and vascular tissues; second, at late grain filling, by developmental ageing and senescence. Regulation of and transition between phases are probably governed by specific NAC and WRKY transcription factors, and both abscisic and jasmonic acid, and are accompanied by changed expression of specific nitrogen transporters. Expression and metabolite profiling suggest glume-specific mechanisms of assimilate conversion and translocation. In summary, grain filling and endosperm sink strength coordinate phase changes in glumes via metabolic, hormonal, and transcriptional control. This study provides a comprehensive view of barley glume development and metabolism, and identifies candidate genes and associated pathways, potentially important for breeding improved grain traits 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a ABA 
650 4 |a N transport 
650 4 |a NAC transcription factors 
650 4 |a WRKY transcription factors. 
650 4 |a barley (Hordeum vulgare L. cv. Barke) 
650 4 |a glumes 
650 4 |a jasmonic acid 
650 4 |a nitrogen (N) remobilization 
650 4 |a seed development 
650 7 |a Plant Proteins  |2 NLM 
650 7 |a Transcription Factors  |2 NLM 
650 7 |a Abscisic Acid  |2 NLM 
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700 1 |a Hollmann, Julien  |e verfasserin  |4 aut 
700 1 |a Erban, Alexander  |e verfasserin  |4 aut 
700 1 |a Kopka, Joachim  |e verfasserin  |4 aut 
700 1 |a Riewe, David  |e verfasserin  |4 aut 
700 1 |a Weschke, Winfriede  |e verfasserin  |4 aut 
700 1 |a Weber, Hans  |e verfasserin  |4 aut 
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