Identification and characterization of molecular mechanisms controlling iron distribution and accumulation during seed development in Chenopodium quinoa.
Iron is an essential micronutrient for all living organisms. Embryo accumulates iron during seed maturation stages of embryogenesis. The role of iron in seed yields is an important agronomical trait because iron deficiency affects plant reproduction and limit crops yields. Using Arabidopsis thaliana...
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| Tipo de recurso: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | Chile |
| OAI Identifier: | oai:repositorio.anid.cl:10533/246399 |
| Acceso en línea: | https://hdl.handle.net/10533/246399 |
| Access Level: | acceso abierto |
| Palabra clave: | Ciencias Naturales Otras Ciencias Naturales |
| Sumario: | Iron is an essential micronutrient for all living organisms. Embryo accumulates iron during seed maturation stages of embryogenesis. The role of iron in seed yields is an important agronomical trait because iron deficiency affects plant reproduction and limit crops yields. Using Arabidopsis thaliana embryos, it has been described that iron accumulates in the vacuoles of the endodermis cell layer. Using Perls/DAB staining we were able to identify that this distribution pattern is conserved in different members from Brassicales. We extend this study to embryos belonging to species from different orders from Eudicotyledoneae. Our results suggest that iron pattern found in Arabidopsis is not extended to all Eudicotyledoneae. Noticeably, in Chenopodium quinoa embryos iron accumulates in several cell layers including cortex and endodermis cells. Interestingly, we detected high amount of phytoferritins in quinoa embryos. Chenopodium quinoa is a highly nutritious crop that is adapted to a wide range of ecosystems and it has reach international attention because of the nutritional value. We found that iron loading during Chenopodium quinoa seed development is different than what we observed before in embryos belonging to the Brassicaceae family. Ours results open new questions about the molecular mechanism controlling iron loading, distribution and accumulation in quinoa embryo seeds. |
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