46. ホスト植物の硝酸態窒素吸収・移行における根寄生植物ヤセウツボのシンク能の可視化

概要

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Since there are no suitable radioactive isotopes of nitrogen, it has been impossible to conduct nitrogen-tracing experiments, especially time course studies with the same intact plants reproducibly. Recently the use of γ-rays emitted on positron-annihilation has been adopted in plant science research. To make the root system of host plant, red clover (Trifolium pratense), infected with broomrape (Orobanche minor) on one side, we used ^<13>N as a positron-emitting tracer, and conducted an elementary trial to visualize ^<13>NO_3-translocation and removement from the host roots by the parasite in the root system by a positron emitting tracer imaging system (PETIS). Accumulation of ^<13>N in tubercle of the parasite on the way from root to shoot of the host plant was observed qualitatively, suggesting that the parasite would be a sink of ^<13>NO_3-absorbed and transported by host root
植物化学調節学会の論文
2003-10-10