J Integr Plant Biol. ›› 1981, Vol. 23 ›› Issue (5): -.

• Research Articles •    

Effect of Oxygen and Carbon Dioxide on Isozymes of Rice and Wheat in Germinating Seeds

Liu Cun-de, Shen Quan-guang, Liang Zheng, Yan Long-fei and Tang Pei-song   

Abstract: The isozymes of cytochrome oxidase (COD), malate dehydrogenase (MDH), glucose-6-phosphate dehydrogenase (G6PDH), peroxidase (POD) and alcohol dehydrogenase (ADH) were measured in the embryo from rice and wheat seeds which germinate in atmospheres ranging from I to 10% 02 and 5% to 25% CO2. The isozyme bands of MDH and COD decreased in atmospheres containing from 1% to 10% O2, but increased for G6PDH under that lower oxygen. COD and POD iso- zymes decreased when the CO2 concentration (5%–25%) was nearer or higher than O2 concentration (25%) In that condition, MDH, G6PDH and ADH were increased. These data suggested that gene expression is regulated by internal and external factors.

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