Gas film retention and underwater photosynthesis during field submergence of four contrasting rice genotypes

Gas film retention and underwater photosynthesis during field submergence of four contrasting rice genotypes

Floods can completely submerge some rice (Oryza sativa L.) fields. Leaves of rice have gas films that aid O 2 and CO 2 exchange under water. The present study explored the relationship between gas film persistence and underwater net photosynthesis (P N ) as influenced by genotype and submergence dur...

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Veröffentlicht in:Journal of Experimental Botany. - Oxford University Press. - 65(2014), 12, Seite 3225-3233
1. Verfasser: Winkel, Anders (VerfasserIn)
Weitere Verfasser: Pedersen, Ole, Ella, Evangelina, Ismail, Abdelbagi M., Colmer, Timothy D.
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2014
Zugriff auf das übergeordnete Werk:Journal of Experimental Botany
Schlagworte:Biological sciences Mathematics Physical sciences Applied sciences
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520 |a Floods can completely submerge some rice (Oryza sativa L.) fields. Leaves of rice have gas films that aid O 2 and CO 2 exchange under water. The present study explored the relationship between gas film persistence and underwater net photosynthesis (P N ) as influenced by genotype and submergence duration. Four contrasting genotypes (FR13A, IR42, Swarna, and Swarna-Sub1) were submerged for 13 days in the field and leaf gas films, chlorophyll, and the capacity for underwater P N at near ambient and high CO 2 were assessed with time of submergence. At high CO 2 during the P N assay, all genotypes initially showed high rates of underwater P N , and this rate was not affected by time of submergence in FR13A. This superior photosynthetic performance of FR13A was not evident in Swarna-Sub1 (carrying the SUB1 QTL) and the declines in underwater P N in both Swarna-Sub1 and Swarna were equal to that in IR42. At near ambient CO 2 concentration, underwater P N declined in all four genotypes and this corresponded with loss of leaf gas films with time of submergence. FR13A retained leaf gas films moderately longer than the other genotypes, but gas film retention was not linked to SUB1. Diverse rice germplasm should be screened for gas film persistence during submergence, as this trait could potentially increase carbohydrate status and internal aeration owing to increased underwater P N , which contributes to submergence tolerance in rice. 
540 |a © Society for Experimental Biology 2014 
650 4 |a Biological sciences  |x Biology  |x Genetics  |x Genotypes 
650 4 |a Biological sciences  |x Agriculture  |x Agricultural sciences  |x Agronomy  |x Crops  |x Field crops  |x Food crops  |x Grains  |x Cereal grains  |x Rice 
650 4 |a Biological sciences  |x Biochemistry  |x Biomolecules  |x Biological pigments  |x Chlorophylls 
650 4 |a Biological sciences  |x Biochemistry  |x Metabolism  |x Autotrophic processes  |x Photosynthesis 
650 4 |a Mathematics  |x Applied mathematics  |x Statistics  |x Applied statistics  |x Statistical physics  |x Dimensional analysis  |x Film thickness 
650 4 |a Physical sciences  |x Earth sciences  |x Hydrology  |x Floods 
650 4 |a Physical sciences  |x Chemistry  |x Chemical reactions  |x Chemical processes  |x Aeration 
650 4 |a Biological sciences  |x Biology  |x Botany  |x Plant morphology  |x Plant vegetation  |x Plant roots 
650 4 |a Physical sciences  |x Earth sciences  |x Geography  |x Geomorphology  |x Topography  |x Lowlands 
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700 1 |a Pedersen, Ole  |e verfasserin  |4 aut 
700 1 |a Ella, Evangelina  |e verfasserin  |4 aut 
700 1 |a Ismail, Abdelbagi M.  |e verfasserin  |4 aut 
700 1 |a Colmer, Timothy D.  |e verfasserin  |4 aut 
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