Huber S C
United States Department of Agriculture, North Carolina State University, Raleigh, North Carolina 27650.
Plant Physiol. 1983 Apr;71(4):818-21. doi: 10.1104/pp.71.4.818.
Variations in leaf starch accumulation were observed among four species (wheat [Triticum aestivum L.], soybean [Glycine max L. Merr.], tobacco [Nicotiana tabacum L.], and red beet [Beta vulgaris L.]), nine peanut (Arachis hypogea L.) cultivars, and two specific peanut genotypes grown under different nutritional regimes. Among the genotypes tested, the activity of sucrose phosphate synthase was correlated negatively with leaf sucrose content in seven of the nine peanut cultivars as well as the two peanut cultivars grown with different mineral nutrition. The peanut cultivars differed in the effect of 10 millimolar sucrose on sucrose phosphate synthase activity in leaf extracts. Enzyme activity in crude leaf extracts was inhibited by sucrose (10-42%) in four of the cultivars tested whereas five cultivars were not. Overall, the results suggest that a correlation exists between the activity of sucrose phosphate synthase and starch/sucrose levels in leaves.
在四种植物（小麦[Triticum aestivum L.]、大豆[Glycine max L. Merr.]、烟草[Nicotiana tabacum L.]和红甜菜[Beta vulgaris L.]）、九个花生（Arachis hypogea L.）品种以及两种在不同营养条件下种植的特定花生基因型中，观察到叶片淀粉积累存在差异。在所测试的基因型中，九个花生品种中的七个以及两种在不同矿质营养条件下种植的花生品种中，蔗糖磷酸合酶的活性与叶片蔗糖含量呈负相关。花生品种对10毫摩尔蔗糖对叶片提取物中蔗糖磷酸合酶活性的影响存在差异。在所测试的四个品种中，粗叶片提取物中的酶活性受到蔗糖（10 - 42%）的抑制，而另外五个品种则不受影响。总体而言，结果表明蔗糖磷酸合酶的活性与叶片中的淀粉/蔗糖水平之间存在相关性。
