Biochemical and physiological characterization of three rice cultivars under different daytime temperature conditions

Heat stress due to high daytime temperatures is one of the main limiting factors in rice (Oryza sativa L.) yield in Colombia. Thus, the objective of the present research was to analyze the effect of three different daytime temperatures (25, 35, and 40 °C) on the physiological responses of three Colo...

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Autores principales:	Sanchez-Reinoso,Alefsi David, Garces-Varon,Gabriel, Restrepo-Diaz,Hermann
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2014
Materias:	Malondialdehyde Oryza sativa photosynthesis proline respiration thermal stress
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392014000400001
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spelling	oai:scielo:S0718-583920140004000012018-10-01Biochemical and physiological characterization of three rice cultivars under different daytime temperature conditionsSanchez-Reinoso,Alefsi DavidGarces-Varon,GabrielRestrepo-Diaz,Hermann Malondialdehyde Oryza sativa photosynthesis proline respiration thermal stress Heat stress due to high daytime temperatures is one of the main limiting factors in rice (Oryza sativa L.) yield in Colombia. Thus, the objective of the present research was to analyze the effect of three different daytime temperatures (25, 35, and 40 °C) on the physiological responses of three Colombian rice cultivars (F60, F733, and F473), thereby contributing to the knowledge of rice acclimation mechanisms. For 10 d, eight plants of each of the three cultivars were subjected daily to 5 h periods of 35 and 40 °C. The control treatment corresponded to normal growth conditions (25 °C). Thermal stress was assessed based on a series of physiological and biochemical parameters. The 35 °C treatment produced photosynthetic and respiratory differences in all three cultivars. At 40 °C, ’F60’ displayed the lowest photosynthetic rate and the highest respiratory rate. Although this cultivar experienced particularly strong electrolyte leakage and changes in proline when subjected to the high-temperature treatments, similar trends were observed in ’F733’ and ’F473’. At 40 °C, the concentration of malondialdehyde (MDA) was lower in ’F473’ than in the other cultivars. These results may explain the poor agronomic performance of ’F60’ in the field under daytime heat stress. The methodologies employed in the present work may be useful in Colombian rice breeding programs, particularly for the selection of heat-tolerant breeding stocks.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.74 n.4 20142014-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392014000400001en10.4067/S0718-58392014000400001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Malondialdehyde Oryza sativa photosynthesis proline respiration thermal stress
spellingShingle	Malondialdehyde Oryza sativa photosynthesis proline respiration thermal stress Sanchez-Reinoso,Alefsi David Garces-Varon,Gabriel Restrepo-Diaz,Hermann Biochemical and physiological characterization of three rice cultivars under different daytime temperature conditions
description	Heat stress due to high daytime temperatures is one of the main limiting factors in rice (Oryza sativa L.) yield in Colombia. Thus, the objective of the present research was to analyze the effect of three different daytime temperatures (25, 35, and 40 °C) on the physiological responses of three Colombian rice cultivars (F60, F733, and F473), thereby contributing to the knowledge of rice acclimation mechanisms. For 10 d, eight plants of each of the three cultivars were subjected daily to 5 h periods of 35 and 40 °C. The control treatment corresponded to normal growth conditions (25 °C). Thermal stress was assessed based on a series of physiological and biochemical parameters. The 35 °C treatment produced photosynthetic and respiratory differences in all three cultivars. At 40 °C, ’F60’ displayed the lowest photosynthetic rate and the highest respiratory rate. Although this cultivar experienced particularly strong electrolyte leakage and changes in proline when subjected to the high-temperature treatments, similar trends were observed in ’F733’ and ’F473’. At 40 °C, the concentration of malondialdehyde (MDA) was lower in ’F473’ than in the other cultivars. These results may explain the poor agronomic performance of ’F60’ in the field under daytime heat stress. The methodologies employed in the present work may be useful in Colombian rice breeding programs, particularly for the selection of heat-tolerant breeding stocks.
author	Sanchez-Reinoso,Alefsi David Garces-Varon,Gabriel Restrepo-Diaz,Hermann
author_facet	Sanchez-Reinoso,Alefsi David Garces-Varon,Gabriel Restrepo-Diaz,Hermann
author_sort	Sanchez-Reinoso,Alefsi David
title	Biochemical and physiological characterization of three rice cultivars under different daytime temperature conditions
title_short	Biochemical and physiological characterization of three rice cultivars under different daytime temperature conditions
title_full	Biochemical and physiological characterization of three rice cultivars under different daytime temperature conditions
title_fullStr	Biochemical and physiological characterization of three rice cultivars under different daytime temperature conditions
title_full_unstemmed	Biochemical and physiological characterization of three rice cultivars under different daytime temperature conditions
title_sort	biochemical and physiological characterization of three rice cultivars under different daytime temperature conditions
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392014000400001
work_keys_str_mv	AT sanchezreinosoalefsidavid biochemicalandphysiologicalcharacterizationofthreericecultivarsunderdifferentdaytimetemperatureconditions AT garcesvarongabriel biochemicalandphysiologicalcharacterizationofthreericecultivarsunderdifferentdaytimetemperatureconditions AT restrepodiazhermann biochemicalandphysiologicalcharacterizationofthreericecultivarsunderdifferentdaytimetemperatureconditions
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Biochemical and physiological characterization of three rice cultivars under different daytime temperature conditions

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