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    Control of Reproductive Floral Organ Identity Specification in Arabidopsis by the C Function Regulator AGAMOUSC

    Ó'Maoiléidigh, Diarmuid S. and Wuest, Samuel E. and Rae, Liina and Raganelli, Andrea and Ryan, Patrick T. and Kwasniewska, Kamila and Das, Pradeep and Lohan, Amanda J. and Loftus, Brendan and Graciet, Emmanuelle and Wellmer, Frank (2013) Control of Reproductive Floral Organ Identity Specification in Arabidopsis by the C Function Regulator AGAMOUSC. Plant Cell, 25 (7). pp. 2482-2503. ISSN 1040-4651

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    The floral organ identity factor AGAMOUS (AG) is a key regulator of Arabidopsis thaliana flower development, where it is involved in the formation of the reproductive floral organs as well as in the control of meristem determinacy. To obtain insights into how AG specifies organ fate, we determined the genes and processes acting downstream of this C function regulator during early flower development and distinguished between direct and indirect effects. To this end, we combined genome-wide localization studies, gene perturbation experiments, and computational analyses. Our results demonstrate that AG controls flower development to a large extent by controlling the expression of other genes with regulatory functions, which are involved in mediating a plethora of different developmental processes. One aspect of this function is the suppression of the leaf development program in emerging floral primordia. Using trichome initiation as an example, we demonstrate that AG inhibits an important aspect of leaf development through the direct control of key regulatory genes. A comparison of the gene expression programs controlled by AG and the B function regulators APETALA3 and PISTILLATA, respectively, showed that while they control many developmental processes in conjunction, they also have marked antagonistic, as well as independent activities.

    Item Type: Article
    Keywords: Control; Reproductive Floral Organ Identity Specification; Arabidopsis; C Function Regulator; AGAMOUS; APETALA3; PISTILLATA;
    Academic Unit: Faculty of Science and Engineering > Biology
    Item ID: 7440
    Identification Number: ​10.​1105/​tpc.​113.​113209
    Depositing User: Emanuelle Graciet
    Date Deposited: 09 Sep 2016 15:13
    Journal or Publication Title: Plant Cell
    Publisher: American Society of Plant Biologists
    Refereed: Yes
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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