Plant and Cell Physiology Advance Access originally published online on March 31, 2008
Plant and Cell Physiology 2008 49(5):853-857; doi:10.1093/pcp/pcn050
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Short Communication |
Unequal Genetic Redundancy of Rice PISTILLATA Orthologs, OsMADS2 and OsMADS4, in Lodicule and Stamen Development
Hokuriku Research Center, National Agricultural Research Center, Niigata, 943-0193 Japan
*Corresponding author: E-mail, yocida{at}affrc.go.jp; Fax, +81-25-524-8578.
| Abstract |
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Two homologs of PISTILLATA have been identified in rice: OsMADS2 and OsMADS4. However, their roles in floral organ development are controversial. Here, we demonstrate that the genes show unequal redundancy of class B function. Although OsMADS2 plays an important role in lodicule development, OsMADS4 also supports the specification of lodicule identity. In contrast, the genes are roughly equally important in stamen development. Consistent with their redundant functions, both OsMADS2 and OsMADS4 interact with the unique rice AP3 ortholog SPW1.
Keywords: Lodicule - OsMADS2 - OsMADS4 - Redundancy - SPW1 - Stamen
Abbreviations: AP3, APETALA3; DL, DROOPING LEAF; mrp, marginal region of palea; PI, PISTILLATA; RNAi, RNA interference; SPW1, SUPERWOMAN1; Y2H, yeast two-hybrid.
(Received February 27, 2008; Accepted March 25, 2008)
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