biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 48:117-120, 2004 | DOI: 10.1023/B:BIOP.0000024286.23683.05

Characterisation of Soybean and Wheat Seeds by Nuclear Magnetic Resonance Spectroscopy

P. Krishnan1,*, D.K. Joshi2, M. Maheswari2, S. Nagarajan2, A.V. Moharir1
1 Division of Agricultural Physics, Indian Agricultural Research Institute, New Delhi, India
2 Nuclear Research Laboratory, Indian Agricultural Research Institute, New Delhi, India

The effects of equilibration under different air relative humidities (RH, 1 - 90 %) and temperatures (35 and 45 °C) on soybean (Glycine max) and wheat (Triticum aestivum) seeds were studied using different techniques. Seed moisture content, electrical conductivity (EC) of seed leachate and per cent seed germination were measured following standard procedures, and compared with nuclear magnetic resonance spin-spin relaxation time (T2) measurements. Moisture contents of soybean and wheat seeds, following the reverse sigmoidal trend, were greater at 35 than at 45 °C at any particular RH. Changes in T2 were related to the changes in germination percentage and leachate EC of both soybean and wheat seeds. Equilibrating soybean seeds at RH ≤ 11 % decreased germination percentage with corresponding decrease in T2. On the contrary, EC of seed leachate increased. In wheat seeds equilibrated at 45 °C, T2 was maximal at RH 5.5 %. T2 declined in seeds equilibrated at high RH (> 80 %) together with low germination percentage.

Keywords: Glycine max; NMR relaxation time (T2); relative humidity; seed equilibration; temperature; Triticum aestivum
Subjects: electrical conductivity, leachate, seed; germination; Glycine max; moisture content, seed; nuclear magnetic resonance spectroscopy; seed, moisture content; soybean, NMR characterization, seed; Triticum aestivum; water content, seed; wheat, NMR characterization, seed

Published: March 1, 2004  Show citation

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Krishnan, P., Joshi, D.K., Maheswari, M., Nagarajan, S., & Moharir, A.V. (2004). Characterisation of Soybean and Wheat Seeds by Nuclear Magnetic Resonance Spectroscopy. Biologia plantarum, 48(1), 117-120. doi: 10.1023/B:BIOP.0000024286.23683.05
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