INVESTIGADORES
RUIZ Oscar Adolfo
artículos
Título:
Chlorophyll Fluorescence and Lipid Peroxidation Changes in Rice Somaclonal lines Subjected to Salt Stress
Autor/es:
MÓNICA RACHOSKI; AYELEN GAZQUEZ; PABLO CALZADILLA; RODOLFO BEZUS; ANDRES RODRIGUEZ; OSCAR A RUIZ; ANA MENENDEZ; SANTIAGO MAIALE
Revista:
ACTA PHYSIOLOGIAE PLANTARUM
Editorial:
SPRINGER HEIDELBERG
Referencias:
Lugar: HEIDELBERG; Año: 2015 vol. 37 p. 3 - 15
ISSN:
0137-5881
Resumen:
The aim of the present work was to explore physiological changes provoked by somaclonal variation in response to salinity. Two parental cultivars (La Candelaria and Yerua) and their derived somaclones   were used as a source for breeding new rice lines with improved salt tolerance.  We studied the effect of NaCl salt stress on chlorophyll fluorescence-related parameters, such as the maximum quantum yield of primary PSII photochemistry (Fv/Fm) and the performance index for energy conservation from photon absorbed by PSII antenna (PIABS). In addition malondiahldehyde (MDA) content and leaf temperature (LT) responses were also measured. In somaclonal lines, Fv/Fm, PIABS, MDA and LT showed coefficients of variation of 13,7%, 39,3%, 25,5%, and 3 % respectively for La Candelaria and 1,4%, 17,6%, 34,4% and 3% for  Yerua.  However, the  fragrant character did not differ in the  aromatic somaclonal lines with respect to their  parentals.  Our results suggest that the Fv/Fm ratio would not be as good marker of PSII vitality as PIABS for salinized rice somaclones, unless they are highly susceptible to salinity.  On other hand, the MDA content showed a strong negative correlation with the PIABS content in somaclones of both rice cultivars, suggesting that MDA levels could also be used as an oxidative damage index in rice somaclones.