期刊
PLANT CELL
卷 24, 期 2, 页码 519-535出版社
AMER SOC PLANT BIOLOGISTS
DOI: 10.1105/tpc.111.092858
关键词
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资金
- Ministry for Education, Culture, Sports, Science, and Technology of Japan [19060004]
- Japan Society for the Promotion of Science [19GS0315, 202203]
- Arabidopsis Functional Genomics Network
- European Research Area Plant Genomics
- Deutsche Forschungsgemeinschaft [592]
- Grants-in-Aid for Scientific Research [19060004] Funding Source: KAKEN
During leaf development in flowering plants, adaxial (upper) and abaxial (lower) side-specific genes are responsible for blade outgrowth, which takes places predominantly in the lateral direction, and for margin development as well as differentiation of adaxial and abaxial tissues. However, the underlying mechanisms are poorly understood. Here, we show that two WUSCHEL-RELATED HOMEOBOX (WOX) genes, PRESSED FLOWER (PRS)/WOX3 and WOX1, encoding homeobox transcription factors, act in blade outgrowth and margin development downstream of adaxial/abaxial polarity establishment. The expression of PRS and WOX1 defines a hitherto undescribed middle domain, including two middle mesophyll layers and the margin, as a center that organizes the outgrowth of leaf blades. The expression of PRS and WOX1 is repressed in the abaxial leaf domain by the abaxial-specific transcription factor KANADI. Furthermore, PRS and WOX1 coordinate adaxial/abaxial patterning together with adaxial-and abaxial-specific genes. Our data suggest a model of blade outgrowth and adaxial/abaxial patterning via the middle domain-specific WOX genes in Arabidopsis thaliana leaves.
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