Production of positron emitters of metallic elements to study plant uptake and distribution
Production of positron emitters of metallic elements to study plant uptake and distribution
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生产金属元素的正电子发射器以研究植物的吸收和分布
DOI：
10.1524/ract.2001.89.11-12.853
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发表时间：
2001
影响因子：
1.8
通讯作者：
S. Mori
中科院分区：
文献类型：
--
作者：
S. Watanabe;N. Ishioka;A. Osa;M. Koizumi;T. Sekine;S. Kiyomiya;H. Nakanishi;S. Mori
金属正电子发射体~（52）Mn、~（52）Fe和~（62）Zn是植物和动物必需的营养元素，它们是植物生理学中一种新的示踪方法。示踪剂方法利用湮灭γ射线的检测，如核医学中的PET，以获得植物的二维图像以及获得植物中指定点的放射性计数;这种方法使我们能够在不接触测试植物的情况下观察示踪剂在活体植物中的运动。以前报道的方法，从目标的放射化学分离这些金属正电子发射体的部分修改，从他们在植物生理学中的使用。用γ射线能谱法测定了最终溶液中残留的放射性核素杂质，并讨论了它们对上述测量的影响。在大麦植株上的实验中，首次得到~（52）Mn ~（2+）离子和~（52）Fe ~（3+）-麦根酸络合物的速度分别为0.2cm/min和1.0cm/min。
The metallic positron emitters 52Mn, 52Fe and 62Zn, the elements of which are essential nutrients for plants as well as for animals, have been produced for a new tracer method in plant physiology. The tracer method utilizes the detection of annihilation γ-rays, like PET in nuclear medicine, to obtain two-dimensional images on a plant as well as to obtain radioactivity counts at specified points in a plant; this method allows us to observe the tracer movement in a living plant without touching the test plant. The previously reported methods of radiochemical separation of these metallic positron emitters from targets were partly modified from the view of their use in plant physiology. Radionuclidic impurities remaining in the final solutions were examined by γ-ray spectrometry, and their influences on the above-mentioned measurements are discussed. From the experiments on a barley plant, the speeds of 52Mn2+ ion and 52Fe3+-mugineic-acid complex have been obtained for the first time to be 0.2 cm/min and 1.0 cm/min, respectively.