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JOURNAL ARTICLE

Cucumber SUPERMAN has conserved function in stamen and fruit development and a distinct role in floral patterning

Jianyu Zhao, Meiling Liu, Li Jiang, Lian Ding, Shuang Shuang Yan, Juan Zhang, Zhaobin Dong, Huazhong Ren, Xiaolan Zhang
PloS One 2014, 9 (1): e86192
24465952
The Arabidopsis SUPERMAN (SUP) gene encodes a C2H2 type zinc finger protein that is required for maintaining the boundaries between stamens and carpels, and for regulating development of ovule outer integument. Orthologs of SUP have been characterized in bisexual flowers as well as dioecious species, but it remains elusive in monoecious plants with unisexual flowers on the same individual. Here we isolate the SUP ortholog in Cucumis sativus L (CsSUP), a monoecious vegetable. CsSUP is predominantly expressed in female specific organs: the female flower buds and ovules. Ectopic expression of CsSUP in Arabidopsis can partially complement the fruit development in sup-5 mutant, and its over-expression in wide-type leads to reduced silique length, suppressed stamen development and distorted petal patterning. Our data suggest that CsSUP plays conserved as well as distinct roles during flower and fruit development, and it may function in the boundaries and ovules to balance petal patterning, stamen and ovule development in Arabidopsis.

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