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| 著者 | Xie K, Wu C, Xiong L. | |
| タイトル | Genomic organization, differential expression, and interaction of SQUAMOSA promoter-binding-like transcription factors and microRNA156 in rice. | |
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Abstract: Transcription factors play essential roles in the developmental processes of plants. Many such factors are regulated by microRNAs (miRNAs). SQUAMOSA (SQUA) promoter-binding-like (SPL) genes encode plant-specific transcription factors, some of which contain complementary sequences of miRNA156. In this study, 19 rice (Oryza sativa) SPL (OsSPL) genes and 12 rice miRNA156 (OsmiR156) precursors were identified in the rice genome. Sequence and experimental analysis suggested that 11 OsSPL genes were putative targets of OsmiR156. Plant SPL proteins were classified into six subgroups based on the phylogenetic analysis of SQUA promoter-binding protein domain. Diverse exon-intron structures and distinct organizations of putative motifs beyond the SQUA promoter-binding protein domains were identified in the OsSPL gene family. Transcript level analysis of OsSPL genes in various rice tissues and organs revealed different tempospatial expression patterns. More than half of the OsSPL genes including most OsmiR156-targeted genes are predominantly expressed in the young panicles, whereas OsmiR156 genes are predominantly expressed in the young shoots and leaves of rice. Overexpression of two OsmiR156 genes (OsmiR156b and OsmiR156h) in rice resulted in severe dwarfism, strongly reduced panicle size, and delayed flowering, suggesting that OsmiR156 and OsSPL target genes are involved in various developmental processes, especially the flower development of rice. Different patterns of transcript changes (decreased or unchanged) of different target genes in same tissue and of same target gene in different tissues detected in the OsmiR156-overexpressing plants suggested diverse interactions between OsmiR156 and OsSPL target genes in a tissue-specific manner. |
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| 掲載誌 | Plant Physiol. | |
| Country | China | |
| 刊数 | 142(1) | |
| ページ | 280-293 | |
| 発刊年 | 2006 | |
| PubMed ID | 16861571 | |
| PubMed Central ID | - | |
| DOI | 10.1104/pp.106.084475 | |
| URL | - | |
| 関連情報 | ||
| 遺伝子 | GLW7 GW8 LCRN1 LG1 MIR156A MIR156B MIR156C MIR156D MIR156E MIR156F MIR156G MIR156I MIR156J MIR156K MIR156L SDT SPL SPL1 SPL11 SPL12 SPL15 SPL17 SPL18 SPL19 SPL2 SPL4 SPL5 SPL6 SPL7 SPL9 SST WFP | |
| INSD | - | |
| 系統 |
野生イネ コアコレクション |
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| 突然変異系統(遺伝研 Collection) | - | |
| 種子不稔系統 | - | |
| 致死変異体系統 | - | |
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組織別発生段階 - 突然変異系統(遺伝子) |
- | |
| 栽培イネ品種(遺伝研 Collection) | - | |
| 組織別発生段階 | - | |
