Journal
PLANT JOURNAL
Volume 80, Issue 1, Pages 69-81Publisher
WILEY
DOI: 10.1111/tpj.12617
Keywords
fruit development; fruit patterning; replum; transcription factors; NO TRANSMITTING TRACT; Arabidopsis thaliana
Categories
Funding
- National Council of Science and Technology of Mexico (CONACyT) [165986]
- CONACyT [82826, 177739]
- European Union [247587]
- Direct For Biological Sciences
- Div Of Molecular and Cellular Bioscience [1052145] Funding Source: National Science Foundation
- EPSCoR
- Office Of The Director [1003970] Funding Source: National Science Foundation
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Fruits are complex plant structures that nurture seeds and facilitate their dispersal. The Arabidopsis fruit is termed silique. It develops from the gynoecium, which has a stigma, a style, an ovary containing the ovules, and a gynophore. Externally, the ovary consists of two valves, and their margins lay adjacent to the replum, which is connected to the septum that internally divides the ovary. In this work we describe the role for the zinc-finger transcription factor NO TRANSMITTING TRACT (NTT) in replum development. NTT loss of function leads to reduced replum width and cell number, whereas increased expression promotes replum enlargement. NTT activates the homeobox gene BP, which, together with RPL, is important for replum development. In addition, the NTT protein is able to bind the BP promoter in yeast, and when this binding region is not present, NTT fails to activate BP in the replum. Furthermore, NTT interacts with itself and different proteins involved in fruit development: RPL, STM, FUL, SHP1 and SHP2 in yeast and in planta. Moreover, its genetic interactions provide further evidence about its biological relevance in replum development.
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