Study : PREMATURE INTERNODE ELONGATION 1 coordinates internode elongation in response to florigenic signals at the shoot apex of rice

Identification

Name

PREMATURE INTERNODE ELONGATION 1 coordinates internode elongation in response to florigenic signals at the shoot apex of rice

Identifier

dXJuOkVWQS9zdHVkeS9QUkpOQTM1NDg2OA==

Source

Data link

Link to this study on EBI European Nucleotide Archive

Description

Flowering of several plant species is induced by exposure to specific photoperiods that promote the expression of florigenic proteins in the leaves and their subsequent translocation to the shoot apex, where they commit the meristem to a reproductive fate. Transition to reproductive growth at the apex is often accompanied by stem elongation, to expose flowers above the leaves and facilitate fertilization. However, how growth and inflorescence formation are coupled and how photoperiodic signals coordinate these processes at the apex is still unclear. We studied these mechanisms in rice, a short day plant. Here, we show that HEADING DATE 3a (Hd3a) and RICE FLOWERING LOCUS T 1 (RFT1), encoding components of the rice florigenic signal, are sufficient to repress expression of PREMATURE INTERNODE ELONGATION 1 (PINE1) at the shoot apex during the transition to flowering, thus promoting culm elongation. PINE1 encodes a nuclear C2H2 zinc finger transcriptional repressor that controls the mRNA abundance of GA3ox2, a gibberellin (GA) biosynthetic gene. These data uncover the existence of a regulatory network coordinating multiple aspects of phase transition, and indicate that GA-induced growth and activity of florigenic proteins at the shoot apex need to be strictly coupled. Overall design: In this study, we investigated the transcriptional reprogramming at the shoot apex of rice plants during floral transition, when plants switch from vegetative to reproductive growth, after exposure to inductive photoperiodic conditions. After continuous growth under long days, we treated two temperate japonica cultivars (Nipponbare and Taichung 65) with four conditions: 1) 0 short days (continuous long day conditions), 2) 4 short days, 3) 8 short days, and 4) 12 short days. Some of the samples in this study were merged for data analysis. The merged samples are: GSM2402823 and GSM2402824 GSM2402826 and GSM2402827 GSM2402828, GSM2402829 and GSM2402830 GSM2402840 and GSM2402841 GSM2402847, GSM2402848 and GSM2402849 Only one processed data file is included for each set of merged samples. Please see the Description field of these samples to find the location of the processed data file.

Data files

Genotype

Accession number	Name	Taxon