Ammonia Emission from Leaves of Different Rice (Oryza sativa L.) Cultivars

作者：Kumagai Etsushi^*; Araki Takuya; Ueno Osamu

来源：Plant Production Science, 2011, 14(3): 249-253.

• Ammonia assimilation
• Ammonia emission
• Glutamine synthetase
• Nitrogen
• Photorespiration
• Rice (Oryza sativa L.) cultivars

NH(3) emission from leaves of three rice (Oryza sativa L.) cultivars, Akenohoshi, Shirobeniya and Kasalath, was examined using a simple open chamber system. In the three cultivars, NH(3) emission rate (AER) and NH(4)(+) content of leaves decreased with decreasing NH(4)(+) concentration in the root medium, but these values differed significantly with the cultivar. In the daytime, AER, NH(4)(+) content and glutamine synthetase (GS) activity in leaves changed similarly with maximum values around midday. Akenohoshi showed significantly lower AER and NH(4)(+) content but higher GS activity than Kasalath. The difference in AER among the rice cultivars may be related to the activity of GS involved in photorespiratory NH(3) recycling. Akenohoshi can be a breeding material useful for improving N recycling.

• 出版日期2011-7