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Title: Ectopic expression of OsYAB1 causes extra stamens and carpels in rice .
Author: Jang S Hur J Kim SJ Han MJ Kim SR An G
Journal: Plant Mol . Biol . Citation: V : 56 ( 1 ) P : 133-43 Year: 2004 Type: ARTICLE
Literature: oryza Field: abstract Doc ID: pub15604733 Accession (PMID): 15604733
Abstract: Members in the YABBY gene family of proteins are plant-specific transcription factors that play critical roles in determining organ polarity . We have isolated a cDNA clone from rice that encodes a YABBY protein . This protein , OsYAB1 , is similar to Arabidopsis YAB2 ( 50 . 3% ) and YAB5 ( 47 . 6% ) . It carries a zinc-finger motif and a YABBY domain , as do those in Arabidopsis . A fusion protein between OsYAB1 and GFP is located in the nucleus . RNA gel-blot analysis showed that the OsYAB1 gene is preferentially expressed in flowers . In-situ hybridization experiments also indicated that the transcript accumulated in the stamen and carpel primordia . Unlike the Arabidopsis YABBY genes , however , the OsYAB1 gene does not show polar expression pattern in the it issues of floral organs . Our transgenic plants that ectopically expressed OsYAB1 were normal during the vegetative growth period , but then showed abnormalities in their floral structures . Spikelets contained supernumerary stamens and carpels compared with those of the wild types . These results suggest that OsYAB1 plays a major role in meristem development and maintenance of stamens and carpels , rather than in determining polarity .
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[ Sen. 3, subscore: 1.00 ]: This protein , OsYAB1 , is similar to Arabidopsis YAB2 ( 50 . 3% ) and YAB5 ( 47 . 6% ) .
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