Silicon isotope fractionation in rice plants, an experimental study on rice growth under hydroponic conditions

Silicon (Si) isotope composition and Si distribution among different rice plant organs and different parts of rice leaf at maturity were studied, which may provide new insights into the mechanism of Si accumulation in plants and biogeochemical Si cycle. An isotope ratio mass spectrometer (IRMS) was...

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Bibliographic Details
Published in:Plant and soil 2008-03, Vol.304 (1-2), p.291-300
Main Authors: Sun, L, Wu, L. H, Ding, T. P, Tian, S. H
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Animal, plant and microbial ecology
Biogeochemistry
Biological and medical sciences
Biomedical and Life Sciences
Distribution
Ecology
Fractionation
Fundamental and applied biological sciences. Psychology
Grains
Hydroponics
Isotope fractionation
Isotopes
Kinetics
Leaf blade
Life Sciences
Oryza sativa
Plant growth
Plant Physiology
Plant roots
Plant Sciences
Plants
Regular Article
Rice
Silicon
Soil Science & Conservation
Transpiration
Uptake
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Summary:Silicon (Si) isotope composition and Si distribution among different rice plant organs and different parts of rice leaf at maturity were studied, which may provide new insights into the mechanism of Si accumulation in plants and biogeochemical Si cycle. An isotope ratio mass spectrometer (IRMS) was used to examine Si isotope fractionation by rice plant grown in a hydroponic system. The observed ³⁰Si-depletion (about 0.3[per thousand]) of whole plant relative to external nutrient solutions suggested biologically mediated Si isotope fractionation occurred during uptake. However, it was not possible to judge the Si uptake mechanism with the data. For δ³⁰Si variation within plant, there was a consistent increasing trend from lower to upper tissues (stem < leaf < husk < grain; leaf sheath < leaf blade base
ISSN:0032-079X
1573-5036
DOI:10.1007/s11104-008-9552-1