Three FLOWERING LOCUS T-like genes function as potential florigens and mediate photoperiod response in sorghum

The New Phytologist
Tezera W WolabuMillion Tadege

Abstract

Sorghum is a typical short-day (SD) plant and its use in grain or biomass production in temperate regions depends on its flowering time control, but the underlying molecular mechanism of floral transition in sorghum is poorly understood. Here we characterized sorghum FLOWERING LOCUS T (SbFT) genes to establish a molecular road map for mechanistic understanding. Out of 19 PEBP genes, SbFT1, SbFT8 and SbFT10 were identified as potential candidates for encoding florigens using multiple approaches. Phylogenetic analysis revealed that SbFT1 clusters with the rice Hd3a subclade, while SbFT8 and SbFT10 cluster with the maize ZCN8 subclade. These three genes are expressed in the leaf at the floral transition initiation stage, expressed early in grain sorghum genotypes but late in sweet and forage sorghum genotypes, induced by SD treatment in photoperiod-sensitive genotypes, cooperatively repressed by the classical sorghum maturity loci, interact with sorghum 14-3-3 proteins and activate flowering in transgenic Arabidopsis plants, suggesting florigenic potential in sorghum. SD induction of these three genes in sensitive genotypes is fully reversed by 1 wk of long-day treatment, and yet, some aspects of the SD treatment may still make a ...Continue Reading

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Citations

Jun 24, 2016·Molecular Biology and Evolution·Hugo E CuevasAndrew H Paterson
May 29, 2016·Plant, Cell & Environment·Lifang NiuMillion Tadege
Nov 18, 2016·Plant Signaling & Behavior·Tezera W Wolabu, Million Tadege
Apr 25, 2019·International Journal of Molecular Sciences·Junmei KangZhen Wang
May 12, 2017·Frontiers in Plant Science·Vittoria BrambillaFabio Fornara
Jun 13, 2018·Proceedings of the National Academy of Sciences of the United States of America·Xin LiJianming Yu
Aug 3, 2019·Plant Biotechnology Journal·Si Nian CharBing Yang
Jul 22, 2017·Frontiers in Plant Science·Andrew N DoustJessica Stromski
Jan 11, 2021·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·WenQian KongAndrew H Paterson

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