School of Science and Technology, Bond University, Gold Coast, Queensland, 4229, Australia.
Plant Physiol. 1990 Sep;94(1):384-7. doi: 10.1104/pp.94.1.384.
The regulation of carbonic anhydrase (CA) activity in maize (Zea mays L.) leaves by light and nitrogen nutrition was determined. CA activity increased by more than 100-fold in illuminated leaves and decreased in leaves placed in the dark; low levels of CA activity were observed in leaves illuminated with low light intensities. CA activity was reduced in plants grown under nitrogen deficiency and recovered only slowly when supplemented with nitrate. Parallel studies were conducted to follow the levels of phosphoenolpyruvate carboxylase. Experiments indicate that the level of CA and phosphoenolpyruvate carboxylase present in leaves may be controlled by similar mechanisms.
研究了光照和氮营养对玉米(Zea mays L.)叶片碳酸酐酶(CA)活性的调节。结果表明,光照下玉米叶片 CA 活性增加了 100 多倍,黑暗中则降低;低光强下叶片 CA 活性较低。氮素缺乏条件下生长的植株中 CA 活性降低,只有在补充硝酸盐时才会缓慢恢复。同时进行了磷酸烯醇丙酮酸羧化酶水平的平行研究。实验表明,叶片中 CA 和磷酸烯醇丙酮酸羧化酶的水平可能受类似机制的控制。