INVESTIGADORES
RODRIGUEZ andres Alberto
artículos
Título:
Physiological response of multiple contrasting rice (Oryza sativa L.) cultivars to suboptimal temperatures
Autor/es:
AYELÉN GÁZQUEZ; SANTIAGO MAIALE; MONICA RACHOSKI; ALFONSO VIDAL; OSCAR RUIZ; ANA BERNARDINA MENÉNDEZ; ANDRES ALBERTO RODRIGUEZ (CORRESPONDING AUTHOR)
Revista:
JOURNAL OF AGRONOMY AND CROP SCIENCE
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2015 vol. 201 p. 117 - 117
ISSN:
0931-2250
Resumen:
The physiological response of multiple rice cultivars, eighteen inicially and eight cultivars later on, to suboptimal temperatures (ST) conditions was investigated in laboratory and outdoor experimental conditions. Treatment with ST decreased growth in different extents according to the cultivar, and affected the PSII performance, determined by chlorophyll fluorescence fast-transient test, and stomatal conductance, regardeless the experimental condition. Two groups of cultivars could be distinguished on the base of their growth and physiological parameters. The group of cultivars presenting higher growths, displayed optimal JIP values, and higher instantaneous water use efficiency (WUEi), due to a lower Gs under ST, unlike cultivars showing lower growth values, which presented worse JIP values and could not adjust their Gs, and hence their WUEi. In this work, we detected at least two cultivars with superior tolerance to ST than the cold tolerant referent Koshihikari. These cultivars could be used as parents or tolerance donors in breeding for new crop varieties. On other hand, positive and significant correlations between data obtained from laboratory and outdoor experiments suggest that laboratory measurements of most of the above mentioned parameters would be useful to predict the response of rice cultivars to ST outdoor.