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| Gross,Jeferson; Stein,Ricardo José; Fett-Neto,Arthur Germano; Fett,Janette Palma. |
| Iron is essential for plants. However, excess iron is toxic, leading to oxidative stress and decreased productivity. Therefore, plants must use finely tuned mechanisms to keep iron homeostasis in each of their organs, tissues, cells and organelles. A few of the genes involved in iron homeostasis in plants have been identified recently, and we used some of their protein sequences as queries to look for corresponding genes in the rice (Oryza sativa) genome. We have assigned possible functions to thirty-nine new rice genes. Together with four previously reported sequences, we analyzed a total of forty-three genes belonging to five known protein families: eighteen YS (Yellow Stripe), two FRO (Fe3+-chelate reductase oxidase), thirteen ZIP (Zinc regulated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Iron; Rice; Genome analysis; Iron transporters; Ferritin. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000400012 |
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| Silveira,Vivian Chagas da; Fadanelli,Cristina; Sperotto,Raul Antonio; Stein,Ricardo José; Basso,Luiz Augusto; Santos,Diógenes Santiago; Vaz Junior,Itabajara da Silva; Dias,Johnny Ferraz; Fett,Janette Palma. |
| Plants ordinarily face iron (Fe) deficiency, since this mineral is poorly available in soils under aerobic conditions. Nonetheless, wetland and irrigated rice plants can be exposed to excess, highly toxic Fe. Ferritin is a ubiquitous Fe-storage protein, important for iron homeostasis. Increased ferritin accumulation resulting from higher Fe availability was shown in some plant species. However, the role of ferritin in tolerance mechanisms to Fe overload in rice is yet to be established. In this study, recombinant rice ferritin was expressed in Escherichia coli, producing an anti-rice ferritin polyclonal antibody which was used to evaluate ferritin accumulation in two rice (Oryza sativa L.) cultivars, either susceptible (BR-IRGA 409) or tolerant (EPAGRI... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: PIXE; Anti-ferritin antiserum; Metal tolerance. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000400019 |
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