2010 Fiscal Year Final Research Report
Genetic mechanism of leaf blade flattening in unifacial leaves
| Project/Area Number |
21770071
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Morphology/Structure
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| Research Institution | National Institute for Basic Biology |
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Principal Investigator |
YAMAGUCHI Takahiro National Institute for Basic Biology, 植物発生遺伝学研究部門, 助教 (60450201)
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| Project Period (FY) |
2009 – 2010
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| Keywords | 発生 / 進化 / 単子葉植物 / 単面葉 / 葉の極性 / 葉の平面成長 |
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| Research Abstract |
Angiosperm leaves generally develop as bifacial structures with distinct adaxial and abaxial identities. However, several monocot species, such as iris and leek, develop unifacial leaves, in which leaf blades have only abaxial identity. In bifacial leaves, adaxial-abaxial polarity is required for leaf blade flattening, whereas many unifacial leaves become flattened despite their leaf blades being abaxialized. Here, I investigated the mechanisms underlying the development and evolution of flattened leaf blades in unifacial leaves. I demonstrated that an ortholog of the DROOPING LEAF (DL) gene may promote flattening of the unifacial leaf blade. Based on the results, I proposed genetic model for the leaf blade flattening in unifacial leaves.
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