Department of Rasioecology, Institute for Environmental Sciences (IES), 1-7 Rokkasho, Aomori 039-3212, Japan.
Institute of Fruit Tree and Tea Science, NARO, 92-24 Nabeyashiki, Shimokuriyagawa, Morioka, Iwate 020-0123, Japan.
Radiat Prot Dosimetry. 2022 Sep 9;198(13-15):920-925. doi: 10.1093/rpd/ncac011.
In this study, we aimed to investigate the photoassimilation process of 14CO2 into agricultural plants through determining the photoassimilated carbohydrate-13C in each part (leaves, current branch and fruit) of the fruit-bearing apple shoots exposed to 13CO2 in different growth stages (early and late fruit development stages). The carbohydrate content was assessed as soluble (ethanol-extracted fraction) and other (HCl-extracted and residual fractions) components. The total (i.e. sum of the three fractions) bulk carbohydrate concentrations in all parts of the shoots were statistically similar between different growth stages. The changes in the concentration of 13C-labeled soluble carbohydrate (i.e. ethanol-extracted fraction) to the total content between different growth stages were statistically unclear among all parts of the shoot. These results suggest that the distribution ratio of photoassimilated 13C in soluble and other components in the apple shoot was thereabout constantly independent of the growth stages.
在这项研究中，我们旨在通过测定在不同生长阶段（果实早期和晚期发育阶段）暴露于 13CO2 下的果实苹果嫩枝的各个部分（叶片、当年生枝条和果实）中 14CO2 的光合同化产物-13C 来研究农业植物的光合同化过程。碳水化合物含量被评估为可溶性（乙醇提取部分）和其他（HCl 提取和残留部分）成分。嫩枝各部分的总（即三个部分的总和）碳水化合物浓度在不同的生长阶段之间统计学上无显著差异。在嫩枝各部分之间，不同生长阶段 13C 标记的可溶性碳水化合物（即乙醇提取部分）与总含量的浓度变化在统计学上并不明显。这些结果表明，苹果嫩枝中光合同化 13C 在可溶性和其他成分中的分配比例与生长阶段无关，几乎是恒定的。
