Journal
JOURNAL OF PLANT BIOLOGY
Volume 52, Issue 6, Pages 543-549Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s12374-009-9070-6
Keywords
Arabidopsis thaliana; Double B-box type zinc finger; Flower development
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Funding
- National Natural Science Foundation of China [30600368, 30770200, 30871325]
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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.
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