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首页> 外文期刊>日本作物學會紀事 >Photosynthetic Activity of the Pods of Rape Plants (Brassica napus L.) and the Contribution of the Pods to the Ripening of Rape-seeds
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Photosynthetic Activity of the Pods of Rape Plants (Brassica napus L.) and the Contribution of the Pods to the Ripening of Rape-seeds

机译：强奸植物（Brassica Napus L.）豆荚的光合活动及豆荚对强奸籽的贡献

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The present study was conducted to clarify the photosynthetic activity of the pods of rape plants and the effect of the pods on the ripening of rape-seeds. In making the present study, the productive characters of the plants and the net photosynthetic rates of the pods were investigated. Furthermore, the processes of accumulation of 14C-photosynthates were also traced by means of a 14C-tracer method. The study results are summarized as follows: (1) At the early ripening stage, the surface areas of pods showed on about eight-fold areas, as compared with those of the leaf blades. Marked increases in the pod surface areas were observed during the period ranging from the early ripening stage to the late ripening stage, while the leaf blade areas showed decreases during the same period. (2) The dry weights of the pods or seeds were becoming heavier according as they have grown and the higher distribution ratios of dry matters were observed in the pods, as compared with those in other organs. The pods and leaf blades showed almost the same net photosynthetic activity at the early ripening stage, but at the late ripening stage, the pods came to show higher rate than that of leaf blades. (3) Chlorophyll-a and -b contents in the pods were low, as compared with those in leaf blades. Chlorophyll contents in the pods were equivalent to about one-fifth of those in the leaf blades. (4) From the results obtained through the 14C-tracer experiments in photosynthates, higher specific radioactivities were observed in the tissues of pods and peduncles, while lower ones were observed in the stems and roots. 14C-photosynthates in the seeds observed one hour after the 14CO2 gas exposure accounted for about sixty percent of those of the seeds observed seven days after the 14CO2 exposure. On the seventh day after 14CO2 feeding, a markedly rich accumulation of 14C-photosynthates was found only in the case of seeds, and the decreases in 14C-photosynthates were observed in the cases of other tissues. Therefore, it may safely be said that 14C-photosynthates in the pods may translocate mainly to the seeds. (5) Viewed from the histochemical point, the assimilating parenchyma and vascular bundles were developed in pods as well as the leaf blades. The starch granules were found far more abundantly in the palisade parenchyma of leaf blades than in the assimilating parenchyma of the pods. (6) From the above mentioned results, it might be concluded that the pods of rape plants have the photosynthetic function and contribute very actively to the accumulation of photosynthates in the rape-seeds.
机译：进行本研究以阐明油菜植物豆荚的光合活性及豆荚对强奸籽粒的效果。在进行本研究时，研究了植物的生产特征和豆荚的净光合速率。此外，还通过14C示踪方法跟踪14C-光合酯的积累过程。研究结果总结如下：（1）在早期成熟阶段，与叶片的叶片相比，豆荚的表面积显示约八倍。在从早期成熟阶段到后期成熟阶段的时段期间观察到豆荚表面区域的标记增加，而叶片区域在同一时期显示出降低。 （2）与其他器官中的那样，豆荚或种子的干重变得较重，并且在豆荚中观察到豆荚中的较高分布比。豆荚和叶片在早期成熟阶段显示出几乎相同的净光合作用活动，但在晚熟阶段，豆荚比叶片显示比叶片更高的速度。 （3）与叶片叶片的叶片中的叶绿素-A和-B含量低。荚中的叶绿素含量相当于叶片中的大约五分之一。 （4）从通过光合素中的14℃跟踪实验获得的结果，在豆荚和花序梗的组织中观察到更高的细菌放射性，而在茎和根中观察到较低的放射性。在14Co2气体暴露于14Co2暴露后七天七天观察到的种子中约有60％的种子，观察到的种子中的14℃ - 光合酯。在14Co2喂养后的第七天，仅在种子的情况下发现了14℃-光合酯的显着积累，在其他组织的情况下观察到14℃-光合酯的降低。因此，可以安全地说，豆荚中的14℃ - 光合酯可以主要用于种子。 （5）从组织化学点观察，在豆荚以及叶片中开发了同化的实质和血管束。淀粉颗粒在叶片叶片的Palisade薄壁颗粒中比在豆荚的同化薄壁组织中被发现。 （6）从上面提到的结果中，可以得出结论，强奸植物的豆荚具有光合作用，并非常积极地促进强奸种子的光合素的积累。

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