Transcriptome sequencing of peduncle in heading stage in rice

The high-yielding green revolution varieties of cereal crops are characterized by semi-dwarf architecture and lodging resistance. Plant height is tightly regulated by availability of phosphate (Pi), yet the underlying mechanism remains obscure. Here, we report that rice R2R3-type MYB transcription factor, MYB110 is a Pi-dependent negative regulator of plant height. MYB110 is a direct target of Pi-Starvation-Response-2 (OsPHR2) and responsible for OsPHR2-mediated inhibition of rice height. Inactivation of MYB110 increased culm diameter and bending resistance, leading to enhanced lodging resistance despite increased plant height.To investigate the molecular mechanism underlying MYB110-regulated plant height, a transcriptomic analysis was performed with the peduncles of myb110 mutants and WT plants at heading stage.