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Reference Detail
| Reference | ||
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| Author | Yang A., Li Q., Chen L., Zhang W.H. | |
| Title | A rice small GTPase, OsRab6a, is involved in the regulation of grain yield and iron nutrition in response to CO2 enrichment. | |
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Abstract: Despite extensive studies on the effects of elevated atmospheric CO2 concentrations ([CO2]) on rice, the molecular players and signaling events underlying adaptation of rice plants to elevated [CO2] remains largely elusive. Here, we report that the OsRab6a gene encoding a small GTPase is involved in the regulation of rice growth, seed yield and iron (Fe) accumulation in response to elevated [CO2] using wild-type and transgenic rice plants of OsRab6a-overexpressing and OsRab6a-RNAi. No differences in growth and grain yield among wild-type and the transgenic plants were detected under ambient [CO2] conditions. When growing in elevated [CO2] conditions, growth and grain yield of wild-type and OsRab6a-overexpression rice plants were enhanced, with the OsRab6a-overexpression rice plants exhibiting higher growth and yield than their wild-type counterparts. In contrast, there were no effects of elevated [CO2] on growth and grain yield of OsRab6a-RNAi plants. Photosynthetic rates of both WT and OsRab6a-overexpressing plants were stimulated by elevated [CO2], with the magnitude of increase being higher in OsRab6a overexpression. Fe concentrations in vegetative tissues and grains of wild-type and transgenic rice plants were reduced by elevated [CO2], and the magnitude of decrease was lower in overexpression than that of wild-type and RNAi plants. The genes associated with Fe acquisition Fe in OsRab6a-overexpressing lines exhibited greater expression than those in WT and OsRab6a-RNAi plants under elevated [CO2]. By analyzing data with the Dunnett's multiple comparison test, our results suggest that OsRab6a is an important molecular regulator underlying rice adaptation to elevated [CO2] by regulating photosynthesis and Fe accumulation. |
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| Journal | J. Exp. Bot. | |
| Country | China | |
| Volume | ||
| Pages | ||
| Year | 2020 | |
| PubMed ID | 32525991 | |
| PubMed Central ID | - | |
| DOI | 10.1093/jxb/eraa279 | |
| URL | - | |
| Relation | ||
| Gene | IRT1 NAS1 NAS2 _ | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
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Lethal Embryo Mutantion Strain |
- | |
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Stages in Each Organ - Muant Lines (Gene) |
- | |
| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
