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

ABSTRACT: 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: firs

SUBMITTER: Kohl S 

PROVIDER: S-EPMC4339599 | biostudies-literature | 2015 Mar

REPOSITORIES: biostudies-literature