Agricultural Research, Science and Education Admin., U.S. Dept. of Agriculture, 61801, Urbana, IL, U.S.A..
Photosynth Res. 1981 Mar;2(1):21-30. doi: 10.1007/BF00036162.
Soybean (Glycine max (L.) Merr.) genotypes varying in area per nodal unit (usually a trifoliolate) and maturity class were grown in plots at the University of Illinois experimental farm. Leaf CO2-exchange rates per unit area (CER) were measured under sunlight on intact plants. In addition to previously reported correlations with specific leaf weight and chlorophyll, CER was positively correlated with ribulose bisphosphate carboxylase (RuBPcase) activity, specific activity, and soluble protein, and was negatively correlated with area per leaf unit. The CER: chlorophyll correlation was destroyed by high CER values in 2 chlorophyll-deficient lines. CER values for 27 of the 35 lines tested fell within the range of those for isolines of cultivar Clark varying in leaf characteristics. The CER values were highest for fully expanded leaves during rapid pod fill. These results suggested that photoperiod (maturity) genes and genes for leaf area growth interact with genes controlling photosynthetic CO2-exchange to produce the major differences in CER values among soybean genotypes.
在伊利诺伊大学实验农场的试验田中，种植了不同叶面积/节单位（通常为三叶）和成熟度的大豆（Glycine max (L.) Merr.）基因型。在阳光照射下，对完整植株的单位叶面积的 CO2 交换速率（CER）进行了测量。除了先前报道的与比叶重和叶绿素的相关性外，CER 还与核酮糖-1,5-二磷酸羧化酶（RuBPcase）活性、比活度和可溶性蛋白呈正相关，与单位叶面积呈负相关。在 2 条叶绿素缺乏系中，高 CER 值破坏了 CER 与叶绿素的相关性。在 35 个测试的品系中，有 27 个品系的 CER 值落在叶片特征不同的栽培品种克拉克的同系物的范围内。在快速荚果填充期间，完全展开的叶片的 CER 值最高。这些结果表明，光周期（成熟）基因和叶片面积生长基因与控制光合作用 CO2 交换的基因相互作用，导致大豆基因型之间 CER 值的主要差异。
