HvSL1 and HvMADS16 promote stamen identity to restrict multiple ovary formation in barley

Caterina Selva; Xiujuan Yang; Neil J Shirley; Ryan Whitford; Ute Baumann; Matthew R Tucker

doi:10.1093/jxb/erad218

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HvSL1 and HvMADS16 promote stamen identity to restrict multiple ovary formation in barley

Journal article

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HvSL1 and HvMADS16 promote stamen identity to restrict multiple ovary formation in barley

Caterina Selva, Xiujuan Yang, Neil J Shirley, Ryan Whitford, Ute Baumann and Matthew R Tucker

Journal of experimental botany, Vol.74(17), pp.5039-5056

2023

DOI: https://doi.org/10.1093/jxb/erad218

PMID: 37279531

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Abstract

Research Papers

Correct floral development is the result of a sophisticated balance of molecular cues. Floral mutants provide insight into the main genetic determinants that integrate these cues, as well as providing opportunities to assess functional variation across species. In this study, we characterize the barley (Hordeum vulgare) multiovary mutants mov2.g and mov1, and propose causative gene sequences: a C2H2 zinc-finger gene HvSL1 and a B-class gene HvMADS16, respectively. In the absence of HvSL1, florets lack stamens but exhibit functional supernumerary carpels, resulting in multiple grains per floret. Deletion of HvMADS16 in mov1 causes homeotic conversion of lodicules and stamens into bract-like organs and carpels that contain non-functional ovules. Based on developmental, genetic, and molecular data, we propose a model by which stamen specification in barley is defined by HvSL1 acting upstream of HvMADS16. The present work identifies strong conservation of stamen formation pathways with other cereals, but also reveals intriguing species-specific differences. The findings lay the foundation for a better understanding of floral architecture in Triticeae, a key target for crop improvement.

Details

Title: HvSL1 and HvMADS16 promote stamen identity to restrict multiple ovary formation in barley
Authors/Creators: Caterina Selva - Australian Wine Research Institute
Xiujuan Yang - The University of Adelaide
Neil J Shirley - Australian Wine Research Institute
Ryan Whitford - Australian Wine Research Institute
Ute Baumann - The University of Adelaide
Matthew R Tucker - The University of Adelaide
Publication Details: Journal of experimental botany, Vol.74(17), pp.5039-5056
Publisher: Oxford University Press on behalf of the Society for Experimental Biology.
Number of pages: 18
Identifiers: 991005779530307891
Copyright: © The Author(s) 2023.
Murdoch Affiliation: Centre for Crop and Food Innovation
Language: English
Resource Type: Journal article

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Citation topics: 3 Agriculture, Environment & Ecology; 3.4 Crop Science; 3.4.159 Arabidopsis
Web Of Science research areas: Plant Sciences
ESI research areas: Plant & Animal Science