FLOWERING LOCUS T3 Controls Spikelet Initiation But Not Floral Development

Plant Physiology
Muhammad Aman MulkiMaria von Korff

Abstract

In many angiosperm plants, FLOWERING LOCUS T (FT)-like genes have duplicated and functionally diverged to control different reproductive traits or stages. Barley (Hordeum vulgare) carries several FT-like genes, the functions of which are not well understood. We characterized the role of HvFT3 in the vegetative and reproductive development of barley. Overexpression of HvFT3 accelerated the initiation of spikelet primordia and the early reproductive development of spring barley independently of the photoperiod. However, HvFT3 overexpression did not accelerate floral development, and inflorescences aborted under short days, suggesting that HvFT3 controls spikelet initiation but not floral development. Analysis of a nonfunctional HvFT3 allele supported the specific effects of this gene on spikelet initiation independent of the photoperiod. HvFT3 caused the up-regulation of the winter and spring alleles of the vernalization gene VERNALIZATION1 (VRN-H1) in nonvernalized plants and was therefore dominant over the repressive effects of the vernalization pathway. Global transcriptome analysis in developing main shoot apices of the transgenic lines showed that HvFT3 modified the expression of genes involved in hormone synthesis and respo...Continue Reading

Citations

Jan 20, 2020·The New Phytologist·Sarah M McKim
Dec 28, 2018·Journal of Experimental Botany·Haiyang LiuYongzhong Xing
May 28, 2019·Frontiers in Plant Science·Magnus GöranssonTherése Bengtsson
Mar 23, 2019·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Takashi OkadaRyan Whitford
Feb 6, 2020·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Zhaoyan ChenZhongfu Ni
Oct 14, 2020·Journal of Experimental Botany·Rebecca PieperMaria von Korff
May 1, 2021·Genes·Biguang HuangZonglie Hong
May 11, 2021·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Miriam Fernández-CallejaErnesto Igartua

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