Molecular mobility in Medicago truncatula seed during early stage of germination : Neutron Scattering and NMR investigations.

Abstract : First hours of Medicago truncatula (MT) seeds germination were investigated using elastic incoherent neutron scattering (EINS) and nuclear magnetic resonance (NMR), to follow respectively how macromolecular motions and water mobility evolve when water permeates into the seed. From EINS results, it was shown that there is an increase in macromolecular mobility with the water uptake. Changes in NMR relaxation parameters reflected microstructural changes associated with the recovery of the metabolic processes. The EINS investigation of the effect of temperature on macromolecular motions showed that there is a relationship between the amount of water in the seeds and the effect of freezing-thawing cycle. The NMR relaxometry results obtained at 253 K allowed establishing possible link between the freezing of water molecules tightly bound to macromolecules and their drastic motion restriction around 250 K, as observed with EINS at the highest water content. (C) 2013 Elsevier B.V. All rights reserved.
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Article dans une revue
Chemical Physics, Elsevier, 2014, 428, pp.181-185
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http://hal.univ-grenoble-alpes.fr/hal-01161769
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Soumis le : mardi 9 juin 2015 - 10:02:07
Dernière modification le : lundi 19 février 2018 - 14:34:03

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Xavier Falourd, Francesca Natali, Judith Peters, Loic Foucat. Molecular mobility in Medicago truncatula seed during early stage of germination : Neutron Scattering and NMR investigations.. Chemical Physics, Elsevier, 2014, 428, pp.181-185. 〈hal-01161769〉

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