Mondal M H, Brun W A, Brenner M L
Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, Minnesota 55108.
Plant Physiol. 1978 Mar;61(3):394-7. doi: 10.1104/pp.61.3.394.
Photosynthetic rate, ribulose 1,5-bisphosphate carboxylase activity, specific leaf weight, and leaf concentrations of carbohydrates, proteins, chlorophyll, and inorganic phosphate were determined periodically from midbloom until maturity in leaves of soybean plants (Glycine max L., var. Hodgson) from which reproductive and vegetative sinks had been removed 32 hours before measurement, or continuously since midbloom.Leaf photosynthesis, measured in the top of the canopy, was partially inhibited by both sink removal treatments. This inhibition was of constant magnitude from midbloom until maturity.Leaf photosynthesis in the top of the canopy declined from midbloom until maturity in the control as well as in the desinked plants. The decline in photosynthesis was gradual at first, but later became more abrupt. The photosynthetic decline was equally evident in the yellowing leaves of control plants and in the dark green leaves of the continuously desinked plants.Neither the inhibition of photosynthesis by sink removal nor the decline in photosynthetic rate with time was clearly related to any of the measured traits.
在大豆植株（Glycine max L.，品种Hodgson）的叶片中，从盛花期中期到成熟期，定期测定光合速率、1,5-二磷酸核酮糖羧化酶活性、比叶重以及叶片中碳水化合物、蛋白质、叶绿素和无机磷酸盐的浓度。这些叶片在测量前32小时去除了生殖和营养库，或者从盛花期中期开始一直保持去除状态。在冠层顶部测量的叶片光合作用，在两种去除库的处理中均受到部分抑制。这种抑制从盛花期中期到成熟期幅度恒定。在对照植株以及去除库的植株中，冠层顶部的叶片光合作用从盛花期中期到成熟期均下降。光合作用的下降起初较为缓慢，但后来变得更加突然。在对照植株的黄叶以及持续去除库的植株的深绿叶中，光合下降同样明显。去除库对光合作用的抑制以及光合速率随时间的下降，均与任何测量的性状无明显关联。
