A Defect in Zinc Finger Protein Double B-box?1a (DBB1a) Causes Abnormal Floral Development in Arabidopsis

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• 作者：Qiming Wang (1) (2)
  Xiaoju Tu (1)
  Keqin Deng (1) (2)
  Jianxin Zeng (1) (2)
  Xiaoying Zhao (1)
  Dongying Tang (1)
  Xuanming Liu (1) (2)
  
• 关键词：Arabidopsis thaliana ; Double B ; box type zinc finger ; Flower development
• 刊名：Journal of Plant Biology
• 出版年：2009
• 出版时间：December 2009
• 年：2009
• 卷：52
• 期：6
• 页码：543-549
• 全文大小：316KB
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• 作者单位：Qiming Wang (1) (2)
  Xiaoju Tu (1)
  Keqin Deng (1) (2)
  Jianxin Zeng (1) (2)
  Xiaoying Zhao (1)
  Dongying Tang (1)
  Xuanming Liu (1) (2)
  
  1. Institute of Life Science and Biotechnology, Hunan University, Changsha, 410082, Hunan Province, People’s Republic of China
  2. State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, Hunan Province, People’s Republic of China
  

文摘

The double B-box (DBB) type zinc finger protein has thus far been shown to be involved in photomorphegenesis in Arabidopsis thaliana. Here, we show that DBB1a is expressed in the embryo, cytolden, and flower. Misexpression of DBB1a in mutant plants resulted in abnormal numbers and patterns of floral organs. We further show that DBB1a could regulate expression of several floral homeotic genes, including APETALA 2, APETALA 3, PISTILLATA, and AGAMOUS. Interestingly, expression of the microRNA gene MiR172, which is involved in organ boundary establishment, was also misregulated in the dbb1a mutant plants. Our study identified a previously uncharacterized role of DDB1a in regulation of expression of floral homeotic genes and miR172, which is important for understanding of floral pattern formation.