Analysis of Water Behavior in a Plant Stem Using a Positron Emitting Nuclide, <SUP>15</SUP>O

• Tanoi Keitaro

  Graduate School of Agricultural and Life Sciences, The Univ. of Tokyo.

• Ohya Tomoyuki

  Graduate School of Agricultural and Life Sciences, The Univ. of Tokyo.

• Hojo Junko

  National Institute of Radiological Sciences

• Suzuki Kazutoshi

  National Institute of Radiological Sciences

• M Nakanishi Tomoko

  Graduate School of Agricultural and Life Sciences, The Univ. of Tokyo.

Bibliographic Information

Other Title

• ポジトロン放出核種<SUP>15</SUP>Oを用いた植物茎における水動態解析

Abstract

We developed a positron detector system to analyze water behavior in a plant stem, non-destructively. Water was labeled by ¹⁵O ([¹⁵O]water) and the trace amount of water uptake was determined through the system. The calibration between the amount of [¹⁵O]water and the counts of the detector system was obtained using a stem-mimic phantom tube. A three-week-old soybean plant was supplied with [¹⁵O]water from the root and the activity of [¹⁵O]water in the 1-cm-epicotyl was measured. The amount of [¹⁵O]water was increased with time linearly from 5 to 15mim, and the water amount was estimated to be about 15μl through calibration. Because the volume of vessel at the epicotyl, in the length of 1cm, was 2.1±0.3μl, the leak-flow of water from the vessel was suggested for the first time.

Journal

• Plant and Cell Physiology Supplement

  Plant and Cell Physiology Supplement 2004 (0), 091-091, 2004

  The Japanese Society of Plant Physiologists

Details

• CRID: 1390001205627678464
• NII Article ID: 130006987931
• DOI: 10.14841/jspp.2004.0.091.0
• Data Source:
  • JaLC
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed