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| 著者 | Liu Z., Wang Z., Gu H., You J., Hu M., Zhang Y., Zhu Z., Wang Y., Liu S., Chen L., Liu X., Tian Y., Zhou S., Jiang L., Liu L., Wan J. | |
| タイトル | Identification and Phenotypic Characterization of <i>ZEBRA LEAF16</i> Encoding a beta-hydroxyacyl-ACP dehydratase in Rice. | |
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Abstract: The chloroplast is a self-independent organelle and contains its own transcription and translation systems. The establishment of genetic systems is vital for normal plant growth and development. We isolated a rice <i>ZEBRA leaf 16</i> (<i>ZL16</i>) mutant derived from rice cultivar 9311. The <i>ZL16</i> mutant showed chlorotic abnormalities in the transverse sectors of the young leaves of seedlings. The use of transmission electron microscopy (TEM) demonstrated that dramatic defects occurred in variegated <i>ZL16</i> leaves during the early development of a chloroplast. Map-based cloning revealed that <i>ZL16</i> encodes a beta-hydroxyacyl-ACP dehydratase (HAD) involved in <i>de novo</i> fatty acid synthesis. Compared with the wild type, a missense mutation (Arg164Trp) in the <i>ZL16</i> mutant was identified, which significantly reduced enzymatic activity and altered the three-dimensional modeling structure of the putative protein. <i>ZL16</i> was ubiquitously expressed in various plant organs, with a pronounced level in the young leaf. A subcellular localization experiment indicated that ZL16 was targeted in the chloroplast. Furthermore, we analyzed the expression of some nuclear genes involved in chloroplast development, and found they were altered in the <i>ZL16</i> mutant. RNA-Seq analysis indicated that some genes related to cell membrane constituents were downregulated in the mutant. An <i>in vivo</i> metabolic assay revealed that the total fatty acid content in the mutant was significantly decreased relative to the wild type. Our results indicate that HAD is essential for the development of chloroplasts by regulating the synthesis of fatty acids in rice. |
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| 掲載誌 | Front Plant Sci | |
| Country | China | |
| 刊数 | 9 | |
| ページ | 782 | |
| 発刊年 | 2018 | |
| PubMed ID | 29946330 | |
| PubMed Central ID | 6005893 | |
| DOI | 10.3389/fpls.2018.00782 | |
| URL | - | |
| 関連情報 | ||
| 遺伝子 | CHLH GUN4 HAD2 HEMA HEME LM3 NDHB NDHD PIL11 PIL13 PIL15 PORA PSAA PSBA RBCL RCA RLIN1 RPOA RPOB RPOC1 RPOC2 SE13 SE5 SPL42 YGL1 YGL10 YGL18 YGL98 YL1 YS53 ZL16 _ _ _ | |
| 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 | - | |
