Differential physiological responses in rice upon exposure to excess distinct iron forms
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Archivos
Fecha
2015-06
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
Kluwer Academic Publishers
Nombre de Curso
Licencia CC
Atribución Internacional (CC BY )
Licencia CC
https://creativecommons.org/licenses/by/4.0/deed.es
Resumen
Background and aims: Rice can be cultivated in highlands, which can expose it to iron deficiency, or under irrigation, which can lead to iron toxicity and lower productivity. This study aimed to investigate the strategies used by rice plants under different divalent and trivalent sources of iron excess. Methods: Rice plants from a lowland and upland cultivar were grown in nutrient solution with toxic concentrations of ferrous or ferric iron. A mineral nutrient quantification and anatomical analysis were performed on leaves and roots. Physiological damage was assessed by leaf photochemical parameters and lipid peroxidation. Expression levels of genes related to iron homeostasis were analyzed. Results: More pronounced nutritional deficiencies, oxidative stress and physiological damage were observed in plants exposed to toxic levels of ferrous iron. Ferritin expression increased in leaves of both cultivars under ferrous or ferric iron excess. Conclusions: We showed that sulfate iron was more toxic to the two rice cultivars even though this iron source was less translocated in the plant. Trivalent iron complexed to citrate is easily translocated through rice plants, but it is less toxic than the divalent iron. Rice plants are able to cope with this iron overload by keeping photosynthetic apparatus working properly. © 2015, The Author(s).
Notas
Indexación: Scopus
Palabras clave
Gene expression, Iron toxicity, Mineral nutrition, Oryza sativa, Photochemical reactions
Citación
Plant and Soil Volume 391, Issue 1-2, Pages 123 - 13828 June 2015
DOI
10.1007/s11104-015-2405-9