Botany Department, Queen's University, Belfast, Northern Ireland.
Planta. 1967 Mar;75(1):10-22. doi: 10.1007/BF00380834.
Enzyme activity is not uniformly distributed through the cotyledon of Pisum arvense. Initially the peripheral region, certain scattered cells of the storage tissue and the procambium show a high level of activity of succinic dehydrogenase, cytochrome oxidase, acid phosphatase and esterase. Activity of acid phosphatase declines sharply after the first day of germination; activity of the other enzymes declines after about three days. In the storage tissue, where activity is lower initially, it declines after about five days and is correlated with the disappearance of the reserves. The pattern of alkaline phosphatase activity is similar except that activity is lower in the procambium but increases in the sieve-elements during differentiation of the phloem. 5-nucleotidase and glucose-6-phosphatase activity is low throughout the cotyledon but it also increases to a significant level in the sieve-elements. Activity of starch synthesizing enzymes is high in the parenchymatous bundle sheath, where they may be involved in the pathway from lipids to soluble carbohydrates.
豌豆子叶中的酶活性不是均匀分布的。最初，周边区域、储存组织的某些散在细胞和原形成层显示出琥珀酸脱氢酶、细胞色素氧化酶、酸性磷酸酶和酯酶的高水平活性。酸性磷酸酶的活性在萌发后的第一天急剧下降；其他酶的活性在大约三天后下降。在储存组织中，活性最初较低，大约五天后下降，并与储备物质的消失相关。碱性磷酸酶活性的模式相似，只是原形成层中的活性较低，但在韧皮部分化过程中筛管中的活性增加。5-核苷酸酶和葡萄糖-6-磷酸酶的活性在整个子叶中较低，但在筛管中也显著增加。淀粉合成酶的活性在薄壁组织束鞘中较高，它们可能参与从脂质到可溶性碳水化合物的途径。
