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AINTEGUMENTA and redundant AINTEGUMENTA-LIKE6 are required for bract outgrowth in Arabidopsis.
- Source :
-
Journal of experimental botany [J Exp Bot] 2024 Jul 10; Vol. 75 (13), pp. 3920-3931. - Publication Year :
- 2024
-
Abstract
- Plants consist of fundamental units of growth called phytomers (leaf or bract, axillary bud, node, and internode), which are repeated and modified throughout shoot development to give plants plasticity for survival and adaptation. One phytomer modification is the suppression or outgrowth of bracts, the leaves subtending the flowers. The floral meristem identity regulator LEAFY (LFY) and the organ boundary genes BLADE-ON-PETIOLE1 (BOP1) and BOP2 have been shown to suppress bract development in Arabidopsis, as mutations in these genes result in bract outgrowth. However, much less is known about the mechanisms that promote bract outgrowth in Arabidopsis mutants such as these. Further understanding of this mechanism may provide a potential tool for modifying leaf development. Here, we showed that the MADS-box genes SUPPRESSOR OF OVEREXPRESSION OF CONSTANS1 (SOC1), FRUITFUL (FUL), and AGAMOUS-LIKE24 (AGL24) play more important roles than BOP1/2 and LFY in bract suppression, and that AINTEGUMENTA (ANT) and the partially redundant AINTEGUMENTA-LIKE6 (AIL6) are necessary for bract outgrowth in these mutant backgrounds. We also demonstrated that misexpression of AIL6 alone is sufficient for bract outgrowth. Our data reveal a mechanism for bract suppression and outgrowth and provide insight into phytomer plasticity.<br /> (© The Author(s) 2024. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our siteāfor further information please contact journals.permissions@oup.com.)
- Subjects :
- Flowers growth & development
Flowers genetics
Gene Expression Regulation, Plant
MADS Domain Proteins genetics
MADS Domain Proteins metabolism
Mutation
Plant Leaves growth & development
Plant Leaves genetics
Plant Leaves metabolism
Transcription Factors metabolism
Transcription Factors genetics
Arabidopsis genetics
Arabidopsis growth & development
Arabidopsis metabolism
Arabidopsis Proteins metabolism
Arabidopsis Proteins genetics
Subjects
Details
- Language :
- English
- ISSN :
- 1460-2431
- Volume :
- 75
- Issue :
- 13
- Database :
- MEDLINE
- Journal :
- Journal of experimental botany
- Publication Type :
- Academic Journal
- Accession number :
- 38547364
- Full Text :
- https://doi.org/10.1093/jxb/erae138