Laboratoire "Structure et Métabolisme des Plantes," associé au CNRS (UA 1128), Bât. 430, Université de Paris-Sud, 91405 Orsay, France.
Plant Physiol. 1989 Feb;89(2):416-20. doi: 10.1104/pp.89.2.416.
The net photosynthetic rate and the activities of ribulose 1,5 bisphosphate carboxylase (RubisCo), phosphoenolpyruvate carboxylase, sucrose-P-synthase, and ADP glucose-pyrophosphorylase, key enzymes of the leaf carbohydrate metabolism were compared in eight maize (Zea mays L.) genotypes presenting large differences in growth rate. The sucrose-P-synthase activity varied in the ratio 1 to 3 from the less active to the more active genotype and this variation was highly correlated with those in growth rate. ADP glucose pyrophosphorylase activity was not significantly different from one genotype to another whatever the basis for expression, leaf area, or soluble protein. The photosynthetic rate varied with similar amplitude (1:1) to the RubisCo activity or RubisCo quantity but the correlation with growth rate was highly significant for photosynthesis and nonsignificant for RubisCo or phosphoenolpyruvate carboxylase. So, in our series of genotypes the sucrose synthesis capacities as expressed by sucrose phosphate synthase activity seem to have a good predicting value for mean growth rate at a young stage.
在 8 个玉米（Zea mays L.）基因型中比较了净光合速率和核酮糖 1,5-二磷酸羧化酶（RubisCo）、磷酸烯醇丙酮酸羧化酶、蔗糖磷酸合成酶和 ADP 葡萄糖焦磷酸化酶的活性，这些基因型的生长速率存在很大差异。蔗糖磷酸合成酶活性的变化比例为 1 比 3，从活性较低的基因型到活性较高的基因型不等，这种变化与生长速率高度相关。ADP 葡萄糖焦磷酸化酶的活性在不同表达基础、叶面积或可溶性蛋白上没有显著差异。光合速率与 Rubisco 活性或 Rubisco 量的变化幅度相似（1:1），但与生长速率的相关性对光合作用非常显著，而对 Rubisco 或磷酸烯醇丙酮酸羧化酶则不显著。因此，在我们的一系列基因型中，蔗糖磷酸合成酶活性所表达的蔗糖合成能力似乎对幼龄期的平均生长速率有很好的预测价值。
