Responses of eighteen rice (Oryza sativa l.) cultivars to temperature tested using two types of growth chambers

Pasuquin Estela Magbujos, Hasegawa Toshihiro, Eberbach Philip, Reinke Russell F., Wade Leonard J., Lafarge Tanguy. 2013. Responses of eighteen rice (Oryza sativa l.) cultivars to temperature tested using two types of growth chambers. Plant Production Science, 16 (3) : 217-225.

Quartile : Q3, Sujet : AGRONOMY

Résumé : Genetic variation in the growth response to temperature is a basis for developing adaptation measures to global warming, but evaluation of cultivars for the temperature responses may depend on other environmental factors such as light. In this study, we tested the growth responses of 18 diverse rice cultivars to constant day/night temperature of 25, 28, 31 and 34ºC in artificially-lit growth chambers (ALC) in Wagga Wagga (7.8 MJ m-2 d-1), and in naturally-lit chambers (NLC) in Yanco (25 and 28ºC and 13.4 MJ m-2 d-1; 31 and 34ºC and 11.5 MJ m-2 d-1), both in NSW, Australia. There was a significant interaction between temperature and chamber type for total shoot and panicle biomass; total shoot biomass was largest at 31ºC in ALC, and at 25 and 28ºC in NLC. From the average of all temperatures, the total shoot biomass declined by 29.5% in plants grown in ALC compared with those grown in NLC. Importantly, cultivar performance in ALC was similar to that in NLC at these temperatures, as evidenced by the highly significant correlation in total shoot biomass between ALC and NLC. Among 18 cultivars, IR64, IR72, N22, Vandana, Takanari and Koshihikari commonly produced a larger total shoot biomass under higher temperature conditions. Leaf area at earlier measurement date was highly correlated with the final total shoot biomass at the higher temperature more than specific leaf area.

Mots-clés Agrovoc : Oryza sativa, variété, changement climatique, adaptation, croissance, température, chambre de croissance, expérimentation en laboratoire, adaptation aux changements climatiques

Mots-clés géographiques Agrovoc : Australie

Classification Agris : F62 - Physiologie végétale - Croissance et développement
F30 - Génétique et amélioration des plantes
P40 - Météorologie et climatologie

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Pasuquin Estela Magbujos, IRRI [International Rice Research Institute] (PHL)
• Hasegawa Toshihiro, NIAES (JPN)
• Eberbach Philip, Charles Sturt University (AUS)
• Reinke Russell F., NSW Agriculture (AUS)
• Wade Leonard J., Charles Sturt University (AUS)
• Lafarge Tanguy, CIRAD-BIOS-UMR AGAP (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/570943/)

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