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https://hdl.handle.net/2440/139002
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Type: | Journal article |
Title: | HvSL1 and HvMADS16 promote stamen identity to restrict multiple ovary formation in barley |
Author: | Selva, C. Yang, X. Shirley, N.J. Whitford, R. Baumann, U. Tucker, M.R. |
Citation: | Journal of Experimental Botany, 2023; 74(17):5039-5056 |
Publisher: | Oxford University Press (OUP) |
Issue Date: | 2023 |
ISSN: | 0022-0957 1460-2431 |
Editor: | Bartlett, M. |
Statement of Responsibility: | Caterina Selva, Xiujuan Yang, Neil J. Shirley, Ryan Whitford, Ute Baumann and Matthew R. Tucker |
Abstract: | 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. |
Keywords: | Barley B-class cereal C2H2 flower development MADS-box multiovary transcription factors Triticeae |
Description: | Advance Access Publication 3 June 2023 |
Rights: | © The Author(s) 2023. Published by Oxford University Press on behalf of the Society for Experimental Biology. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
DOI: | 10.1093/jxb/erad218 |
Grant ID: | http://purl.org/au-research/grants/arc/DP210103491 |
Published version: | http://dx.doi.org/10.1093/jxb/erad218 |
Appears in Collections: | Agriculture, Food and Wine publications |
Files in This Item:
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hdl_139002.pdf | Published version | 5.15 MB | Adobe PDF | View/Open |
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