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First published online October 13, 2005

Development 132, 2101e (2005)
© The Company of Biologists Limited
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In this issue

Fruitful patterning

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Fruit development in Arabidopsis is a good system in which to study how plant organs are patterned, as Dinneny and colleagues show. On p. 4687, these authors reveal a functional link between the patterning systems that define organ polarity and growth, and those that control tissue identity. The region of the fruit that encloses the seed is divided into three zones: valve, replum and valve margin. By examining fruit development in Arabidopsis mutants, the researchers have established a genetic framework for the patterning of these tissues. For example, they report that two transcription factors that establish lateral organ polarity – FILAMENTOUS FLOWER (FIL) and YABBY3 – function redundantly with JAGGED (JAG), which promotes organ growth, to activate the expression of the fruit tissue identity genes FRUITFUL and SHATTERPROOF. Future work should identify how the FIL/YAB3 and JAG pathways have been co-opted to pattern the many organ types of plants.


Related articles in Development:

A genetic framework for fruit patterning in Arabidopsis thaliana
José R. Dinneny, Detlef Weigel, and Martin F. Yanofsky
Development 2005 132: 4687-4696. [Abstract] [Full Text]  




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