Comparison of 15O-Labeled and 18F-Labeled Water Uptake in a Soybean Plant by PETIS (Positron Emitting Tracer Imaging System).

友子, 中西; はる美, 横田; 慶太朗, 田野井; 純, 古川; 奈通子, 池上; 曜子, 大國; 博, 内田; 淳憲, 辻; 典子, 石岡; 智, 渡辺; 明彦, 長; 俊明, 関根; 信平, 松橋; 岳人, 伊藤; 民数, 久米

doi:10.3769/radioisotopes.50.265

Cited by 10 publications

(8 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The application of positron imaging to plant studies has increased significantly since the initial water transport analyses by McKay et al 2 While dynamics of water movement with PET in plants has been widely studied, 25 - 35 other topics related to PET have increasingly been investigated, including uptake and translocation of nutrients, 36 - 52 , 98 , 99 photoassimilate fixation/allocation, 15 , 22 , 23 , 53 - 80 sugar transport, 21 , 82 …”

Section: Physics Of Positron Detection In Plant and Soil Systemsmentioning

confidence: 99%

“…A) [ 18 F]F − was taken up by soybean more rapidly than [ 15 O]H 2 O, which suggests [ 18 F]F − may not be a surrogate for water movement tracer in plants. 32 However, the low required concentration, low binding to plant tissue, and xylem-mediated flow highlight the utility of [ 18 F]F− as a water tracer over longer time periods. B) Application of ALA, used in chlorophyll biosynthesis, increased water translocation in rice ( Oryzia sativa ) by 40% relative to control plants.…”

Section: Positron Imaging To Monitor Water Dynamics In Plantsmentioning

confidence: 99%

See 1 more Smart Citation

From the Outside in: An Overview of Positron Imaging of Plant and Soil Processes

et al. 2020

View full text Add to dashboard Cite

Positron-emitting nuclides have long been used as imaging agents in medical science to spatially trace processes non-invasively, allowing for real-time molecular imaging using low tracer concentrations. This ability to non-destructively visualize processes in real time also makes positron imaging uniquely suitable for probing various processes in plants and porous environmental media, such as soils and sediments. Here, we provide an overview of historical and current applications of positron imaging in environmental research. We highlight plant physiological research, where positron imaging has been used extensively to image dynamics of macronutrients, signalling molecules, trace elements, and contaminant metals under various conditions and perturbations. We describe how positron imaging is used in porous soils and sediments to visualize transport, flow, and microbial metabolic processes. We also address the interface between positron imaging and other imaging approaches, and present accompanying chemical analysis of labelled compounds for reviewed topics, highlighting the bridge between positron imaging and complementary techniques across scales. Finally, we discuss possible future applications of positron imaging and its potential as a nexus of interdisciplinary biogeochemical research.

show abstract

Section: Physics Of Positron Detection In Plant and Soil Systemsmentioning

confidence: 99%

Section: Positron Imaging To Monitor Water Dynamics In Plantsmentioning

confidence: 99%

From the Outside in: An Overview of Positron Imaging of Plant and Soil Processes

et al. 2020

View full text Add to dashboard Cite

show abstract

“…However, the lower picture showed clear difference of the water distribution between heartwood and sapwood parts. Water image of the Japanese cypress showed high amount of water in only outer part of the wood and small amount of water was distributed along the annual ring in inner part Water movement using RI: water movement [28][29][30][31][32][33][34][35] The first trial to analyze water absorption manner was studied using the cowpea plant supplied with 18 F (half-life: 110 min) containing water, which was produced by irradiation of water with He ? beam.…”

Section: Roots Imbedded In Soilmentioning

confidence: 99%

Research with radiation and radioisotopes to better understand plant physiology and agricultural consequences of radioactive contamination from the Fukushima Daiichi nuclear accident

Nakanishi

2017

J Radioanal Nucl Chem

Self Cite

View full text Add to dashboard Cite

Research carried out by me and my group over the last almost four decades are summarized here. The main emphasis of my work was and continues to be on plant physiology using radiation and radioisotopes. Plants live on water and inorganic elements. In the case of water, we developed neutron imaging methods and produced 15 O-labeled water (half-life 2 min) and applied them to understand water circulation pattern in the plant. In the case of elements, we developed neutron activation analysis methods to analyze a large number of plant tissues to follow element specific distribution. Then, we developed realtime imaging system using conventional radioisotopes for the macroscopic and microscopic observation of element movement. After the accident in Fukushima Daiichi nuclear power plant, we, the academic staff of Graduate School, have been studying agricultural effects of radioactive fallout; the main results are summarized in two books published by Springer.

show abstract

“…However, the longer-lived isotope fluorine-18 ( 18 F; 109.8 min radioactive half life) has been used as a proxy for tracing the dynamics of water transport because fluorine ions bind readily to water molecules (Kume et al, 1997;Nakanishi et al, 2001c). The prolonged half-life of 18 F makes it a more attractive candidate for measuring longer-term phenomena, although 18 F labeling likely tracks the movement of fluorine ions more so than water molecules (Nakanishi et al, 2001b). In addition, MRI offers an alternative for measuring the long-term dynamics of water transport in plants (Windt et al, 2006;Van As, 2007).…”

Section: The Use Of Short-lived Positron Emittersmentioning

confidence: 99%

Exploring the transport of plant metabolites using positron emitting radiotracers

et al. 2008

View full text Add to dashboard Cite

Short-lived positron-emitting radiotracer techniques provide time-dependent data that are critical for developing models of metabolite transport and resource distribution in plants and their microenvironments. Until recently these techniques were applied to measure radiotracer accumulation in coarse regions along transport pathways. The recent application of positron emission tomography (PET) techniques to plant research allows for detailed quantification of real-time metabolite dynamics on previously unexplored spatial scales. PET provides dynamic information with millimeter-scale resolution on labeled carbon, nitrogen, and water transport over a small plant-size field of view. Because details at the millimeter scale may not be required for all regions of interest, hybrid detection systems that combine high-resolution imaging with other radiotracer counting technologies offer the versatility needed to pursue wide-ranging plant physiological and ecological research. In this perspective we describe a recently developed hybrid detection system at Duke University that provides researchers with the flexibility required to carry out measurements of the dynamic responses of whole plants to environmental change using short-lived radiotracers. Following a brief historical development of radiotracer applications to plant research, the role of radiotracers is presented in the context of various applications at the leaf to the whole-plant level that integrates cellular and subcellular signals andor controls.

show abstract

Comparison of 15O-Labeled and 18F-Labeled Water Uptake in a Soybean Plant by PETIS (Positron Emitting Tracer Imaging System).

Cited by 10 publications

References 2 publications

From the Outside in: An Overview of Positron Imaging of Plant and Soil Processes

From the Outside in: An Overview of Positron Imaging of Plant and Soil Processes

Research with radiation and radioisotopes to better understand plant physiology and agricultural consequences of radioactive contamination from the Fukushima Daiichi nuclear accident

Exploring the transport of plant metabolites using positron emitting radiotracers

Contact Info

Product

Resources

About