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Changes in photosynthetic electron transfer and state transitions in an herbicide-resistant D1 mutant from soybean cell cultures

Opened Access Changes in photosynthetic electron transfer and state transitions in an herbicide-resistant D1 mutant from soybean cell cultures

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Autor: Roncel Gil, Mercedes
Yruela Guerrero, Inmaculada
Kirilovsky, Diana L.
Guerrero, Fernando
Alfonso Lozano, Miguel
Picorel Castaño, Rafael
Ortega Rodríguez, José María
Departamento: Universidad de Sevilla. Departamento de Bioquímica Vegetal y Biología Molecular
Fecha: 2007
Publicado en: Biochimica et Biophysica Acta, 1767 (6), 694-702.
Tipo de documento: Artículo
Resumen: Anomalies in photosynthetic activity of the soybean cell line STR7, carrying a single mutation (S268P) in the chloroplastic gene psbA that codes for the D1 protein of the photosystem II, have been examined using different spectroscopic techniques. Thermoluminescence emission experiments have shown important differences between STR7 mutant and wild type cells. The afterglow band induced by both white light flashes and far-red continuous illumination was downshifted by about 4 °C and the Q band was upshifted by 5 °C. High temperature thermoluminescence measurements suggested a higher level of lipid peroxidation in mutant thylakoid membranes. In addition, the reduction rate of P700+ was significantly accelerated in STR7 suggesting that the mutation led to an activation of the photosystem I cyclic electron flow. Modulated fluorescence measurements performed at room temperature as well as fluorescence emission spectra at 77 K revealed that the STR7 mutant is defective in state transitions....
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Cita: Roncel Gil, M., Yruela Guerrero, I., Kirilovsky, D.L., Guerrero, F., Alfonso Lozano, M., Picorel Castaño, R. y Ortega Rodríguez, J.M. (2007). Changes in photosynthetic electron transfer and state transitions in an herbicide-resistant D1 mutant from soybean cell cultures. Biochimica et Biophysica Acta, 1767 (6), 694-702.
Tamaño: 291.0Kb
Formato: PDF

URI: https://hdl.handle.net/11441/70928

DOI: 10.1016/j.bbabio.2007.02.017

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