ArticlePlant molecular biology2017
The far-upstream regulatory region of RFL is required for its precise spatial-temporal expression for floral development in rice.
Article in Plant molecular biology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- Alternatively spliced killer-protector system confers S19-mediated hybrid male sterility in rice.Nature communications · 2026Article
- Single-cell transcriptomic and cell‑type‑specific regulatory networks in Polima temperature-sensitive cytoplasmic male sterility of Brassica napus L.BMC plant biology · 2024Article
- Analysing the rice young panicle transcriptome reveals the gene regulatory network controlled by TRIANGULAR HULL1.Rice (New York, N.Y.) · 2019Article
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8 authors.
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Abstract
key messageA rice mutant aberrant floral organ 1 (afo1) was identified, showing increased floral organ number, aberrant floral organ identity and loss of floral meristem determinacy. A disruption of sequence integrity at 6292-bp upstream of RFL by a T-DNA insertion led to varied RFL expression patterns in floral meristem and floret in afo1 and caused the mutant phenotype. The LEAFY (LFY) transcription factor and its homologs affect many aspects of plant development, especially floral development. RICE FLORICAULA/LEAFY (RFL), the rice ortholog of LFY, has complicated expression patterns and different functions in floral development. However, the mechanisms regulating the spatial-temporal expression of RFL remain largely unknown. Here, we describe a rice aberrant floral organ 1 (afo1) mutant that was produced by a T-DNA insertion at 6292-bp upstream of the start codon of RFL. This insertion altered the expression of RFL in floral meristem (FM) and floret. The in situ hybridization result showed that, when florets appear, RFL was expressed almost exclusively at the palea/lemma adaxial base adjacent to lodicules in the wild-type panicle. However, in afo1 florets, RFL mRNA signals were detected in the region between lodicule and stamen, and strong signals persisted in FM. The altered pattern of RFL expression in afo1 resulted in enlarged FMs, more floral organs, aberrant floral organ identity, and loss of FM determinacy. Transformation of rice with an RFL construct driven by the 6292-bp upstream genomic sequence re-built the mutant phenotype similar to afo1. The results suggest that the far-upstream region of RFL may contain potential cis element(s) that are critical to define the precise spatial-temporal expression pattern of RFL for its function in floral development.
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