IIB   20738
INSTITUTO DE INVESTIGACIONES BIOLOGICAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
NO AND ROS REGULATION OF FIT1 AND FRO2 EXPRESSION UNDER IRON DEFICIENCY IN A. thaliana ROOTS
Autor/es:
D´AMBROSIO, J; FERNANDEZ, M. B.; SOTO, D.; VICARIO, R.; LAXALT, A. M.; TEN HAVE, A; PINEDO, M.; LAMATTINA, L.
Lugar:
Villa Carlos Paz, Cordoba, Argentina
Reunión:
Congreso; XLIV Reunion Anual SAIB; 2008
Institución organizadora:
Sociedad Argantina de Investigacion en Bioquimica y Biologia Molecular
Resumen:
Iron deficiency alters plant molecular physiology.Under these conditions, Arabidopsis thaliana have developed a strategy that implies rizosphere acidification,reduction of Fe3+ by the Fe3+- reductase FRO2 and the uptake of Fe2+. The bHLH transcription factor FIT1, whose expression is regulated by nitric oxide (NO) under iron deficiency in tomato,regulates FRO2 mRNA levels. Preliminary evidence showed that iron deficiency increases NO and ROS levels. Crosstalk between ROS and NO has been extensively studied in many patho-phisiological processes. We decided to study NO and ROS effects during iron deficiency in A. thaliana roots. Treatments with the H O scavenger, and catalase produced an 2 2 Arabidopsis thaliana have developed a strategy that implies rizosphere acidification,reduction of Fe3+ by the Fe3+- reductase FRO2 and the uptake of Fe2+. The bHLH transcription factor FIT1, whose expression is regulated by nitric oxide (NO) under iron deficiency in tomato,regulates FRO2 mRNA levels. Preliminary evidence showed that iron deficiency increases NO and ROS levels. Crosstalk between ROS and NO has been extensively studied in many patho-phisiological processes. We decided to study NO and ROS effects during iron deficiency in A. thaliana roots. Treatments with the H O scavenger, and catalase produced an 2 2 3+ by the Fe3+- reductase FRO2 and the uptake of Fe2+. The bHLH transcription factor FIT1, whose expression is regulated by nitric oxide (NO) under iron deficiency in tomato,regulates FRO2 mRNA levels. Preliminary evidence showed that iron deficiency increases NO and ROS levels. Crosstalk between ROS and NO has been extensively studied in many patho-phisiological processes. We decided to study NO and ROS effects during iron deficiency in A. thaliana roots. Treatments with the H O scavenger, and catalase produced an 2 2 2+. The bHLH transcription factor FIT1, whose expression is regulated by nitric oxide (NO) under iron deficiency in tomato,regulates FRO2 mRNA levels. Preliminary evidence showed that iron deficiency increases NO and ROS levels. Crosstalk between ROS and NO has been extensively studied in many patho-phisiological processes. We decided to study NO and ROS effects during iron deficiency in A. thaliana roots. Treatments with the H O scavenger, and catalase produced an 2 2 A. thaliana roots. Treatments with the H O scavenger, and catalase produced an 2 2 2 2 increase in NO and a decrease in FRO2 and FIT1 transcript levels under iron deficiency.