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| 著者 | Ricachenevsky F.K., Sperotto R.A., Menguer P.K., Sperb E.R., Lopes K.L., Fett J.P. | |
| タイトル | ZINC-INDUCED FACILITATOR-LIKE family in plants: Lineage-specific expansion in monocotyledons and conserved genomic and expression features among rice (Oryza sativa) paralogs | |
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Abstract: Background: Duplications are very common in the evolution of plant genomes, explaining the high number of members in plant gene families. New genes born after duplication can undergo pseudogenization, neofunctionalization or subfunctionalization. Rice is a model for functional genomics research, an important crop for human nutrition and a target for biofortification. Increased zinc and iron content in the rice grain could be achieved by manipulation of metal transporters. Here, we describe the ZINC-INDUCED FACILITATOR-LIKE (ZIFL) gene family in plants, and characterize the genomic structure and expression of rice paralogs, which are highly affected by segmental duplication.Results: Sequences of sixty-eight ZIFL genes, from nine plant species, were comparatively analyzed. Although related to MSF_1 proteins, ZIFL protein sequences consistently grouped separately. Specific ZIFL sequence signatures were identified. Monocots harbor a larger number of ZIFL genes in their genomes than dicots, probably a result of a lineage-specific expansion. The rice ZIFL paralogs were named OsZIFL1 to OsZIFL13 and characterized. The genomic organization of the rice ZIFL genes seems to be highly influenced by segmental and tandem duplications and concerted evolution, as rice genome contains five highly similar ZIFL gene pairs. Most rice ZIFL promoters are enriched for the core sequence of the Fe-deficiency-related box IDE1. Gene expression analyses of different plant organs, growth stages and treatments, both from our qPCR data and from microarray databases, revealed that the duplicated ZIFL gene pairs are mostly co-expressed. Transcripts of OsZIFL4, OsZIFL5, OsZIFL7, and OsZIFL12 accumulate in response to Zn-excess and Fe-deficiency in roots, two stresses with partially overlapping responses.Conclusions: We suggest that ZIFL genes have different evolutionary histories in monocot and dicot lineages. In rice, concerted evolution affected ZIFL duplicated genes, possibly maintaining similar expression patterns between pairs. The enrichment for IDE1 boxes in rice ZIFL gene promoters suggests a role in Zn-excess and Fe-deficiency up-regulation of ZIFL transcripts. Moreover, this is the first description of the ZIFL gene family in plants and the basis for functional studies on this family, which may play important roles in Zn and Fe homeostasis in plants. 諱ｯ 2011 Ricachenevsky et al; licensee BioMed Central Ltd. |
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| 掲載誌 | BMC Plant Biology | |
| Country | Brazil | |
| 刊数 | 11 | |
| ページ | - | |
| 発刊年 | 2011 | |
| PubMed ID | 21266036 | |
| PubMed Central ID | - | |
| DOI | - | |
| URL | - | |
| 関連情報 | ||
| 遺伝子 | IRO2 TOM1 ZIFL1 ZIFL10 ZIFL11 ZIFL12 ZIFL13 ZIFL2 ZIFL3 ZIFL5 ZIFL6 ZIFL7 ZIFL8 ZIFL9 | |
| 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 | - | |
