Kumar P A, Chatterjee S R, Abrol Y P
Nuclear Research Laboratory, Indian Agricultural Research Institute, New Delhi.
Indian J Biochem Biophys. 1990 Jun;27(3):164-6.
Effects of methionine sulphoximine (MSX) on glutamine synthetase activity and ammonia accumulation in the leaves of barley, sorghum and Moricandia arvensis were studied. Glutamine synthetase activity of sorghum leaves was relatively resistant to MSX treatment during initial stages. All the three plant species exhibited considerable accumulation of ammonia arising from non-photorespiratory sources, in response to MSX treatment. Minimal estimates of the rate of glycine decarboxylation were made employing MSX and isonicotinyl hydrazide together in the treatment solution. Changes in the pool sizes of amino acids involved in photorespiratory nitrogen metabolism as affected by MSX have also been investigated.
研究了蛋氨酸亚砜亚胺（MSX）对大麦、高粱和田野滨藜叶片谷氨酰胺合成酶活性及氨积累的影响。在初始阶段，高粱叶片的谷氨酰胺合成酶活性对MSX处理相对抗性较强。响应MSX处理，所有这三种植物都表现出非光呼吸来源产生的氨大量积累。在处理溶液中同时使用MSX和异烟酰肼对甘氨酸脱羧速率进行了最小估计。还研究了受MSX影响的光呼吸氮代谢中涉及的氨基酸库大小的变化。
