Molecular Mobility and Seed Longevity in Chenopodium quinoa

This work analyzed the relationship between water mobility and quinoa seed longevity. Transverse relaxation times ( T 2 s) by time - resolved nuclear magnetic resonance (NMR) of four genotypes of quinoa seeds (cultivars Chadmo , NL - 6 , Sajama , and 2 - Want ) equilibrated at relative humidities (R...

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Autores principales:	Castellión, Martina Laura, Buera, María del Pilar
Publicado:	2010
Materias:	Molecular mobility, seed longevity-chenopodium quinoa Monoexponential and biexponential decay curves-fitting experimental data Monoexponential curves-constant in biexponential curves Proton spin relaxation times-predicting quinoa seed longevity Temperature and moisture-fundamental role in storage longevity of seeds Time-resolved nuclear magnetic resonance (NMR) spectroscopy-studying water status and metabolic changes
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97808138_v_n_p647_Castellion http://hdl.handle.net/20.500.12110/paper_97808138_v_n_p647_Castellion
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_97808138_v_n_p647_Castellion
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spelling	paper:paper_97808138_v_n_p647_Castellion2023-06-08T16:37:10Z Molecular Mobility and Seed Longevity in Chenopodium quinoa Castellión, Martina Laura Buera, María del Pilar Molecular mobility, seed longevity-chenopodium quinoa Monoexponential and biexponential decay curves-fitting experimental data Monoexponential curves-constant in biexponential curves Proton spin relaxation times-predicting quinoa seed longevity Temperature and moisture-fundamental role in storage longevity of seeds Time-resolved nuclear magnetic resonance (NMR) spectroscopy-studying water status and metabolic changes This work analyzed the relationship between water mobility and quinoa seed longevity. Transverse relaxation times ( T 2 s) by time - resolved nuclear magnetic resonance (NMR) of four genotypes of quinoa seeds (cultivars Chadmo , NL - 6 , Sajama , and 2 - Want ) equilibrated at relative humidities (RHs) in the range of 22% - 83% were measured. Quinoa seed germination and viability were tested. The curves obtained from seeds equilibrated at low RHs were fi tted best to monoexponential decay, with T 2 values in the range of 100 - 130 ms. The amplitude of the signal was related to the relative amount of lipid and was unaffected by RH. At 50% RH, curves began to fi t biexponential decay best. The second term of the biexponential curves showed T 2 values in the range of 1.13 - 2.54 ms, increasing as RH increased. The analysis of isotherm shapes and glass transition temperatures of quinoa seeds revealed that the second term could be attributed to protons both of water in multilayers and of plasticized solids above the glass transition temperature. Germination tests showed different storage behaviors between cultivars. Water mobility alone did not explain quinoa seed longevity after storage under these experimental conditions. © 2010 Blackwell Publishing. Fil:Castellión, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Buera, M.D.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97808138_v_n_p647_Castellion http://hdl.handle.net/20.500.12110/paper_97808138_v_n_p647_Castellion
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Molecular mobility, seed longevity-chenopodium quinoa Monoexponential and biexponential decay curves-fitting experimental data Monoexponential curves-constant in biexponential curves Proton spin relaxation times-predicting quinoa seed longevity Temperature and moisture-fundamental role in storage longevity of seeds Time-resolved nuclear magnetic resonance (NMR) spectroscopy-studying water status and metabolic changes
spellingShingle	Molecular mobility, seed longevity-chenopodium quinoa Monoexponential and biexponential decay curves-fitting experimental data Monoexponential curves-constant in biexponential curves Proton spin relaxation times-predicting quinoa seed longevity Temperature and moisture-fundamental role in storage longevity of seeds Time-resolved nuclear magnetic resonance (NMR) spectroscopy-studying water status and metabolic changes Castellión, Martina Laura Buera, María del Pilar Molecular Mobility and Seed Longevity in Chenopodium quinoa
topic_facet	Molecular mobility, seed longevity-chenopodium quinoa Monoexponential and biexponential decay curves-fitting experimental data Monoexponential curves-constant in biexponential curves Proton spin relaxation times-predicting quinoa seed longevity Temperature and moisture-fundamental role in storage longevity of seeds Time-resolved nuclear magnetic resonance (NMR) spectroscopy-studying water status and metabolic changes
description	This work analyzed the relationship between water mobility and quinoa seed longevity. Transverse relaxation times ( T 2 s) by time - resolved nuclear magnetic resonance (NMR) of four genotypes of quinoa seeds (cultivars Chadmo , NL - 6 , Sajama , and 2 - Want ) equilibrated at relative humidities (RHs) in the range of 22% - 83% were measured. Quinoa seed germination and viability were tested. The curves obtained from seeds equilibrated at low RHs were fi tted best to monoexponential decay, with T 2 values in the range of 100 - 130 ms. The amplitude of the signal was related to the relative amount of lipid and was unaffected by RH. At 50% RH, curves began to fi t biexponential decay best. The second term of the biexponential curves showed T 2 values in the range of 1.13 - 2.54 ms, increasing as RH increased. The analysis of isotherm shapes and glass transition temperatures of quinoa seeds revealed that the second term could be attributed to protons both of water in multilayers and of plasticized solids above the glass transition temperature. Germination tests showed different storage behaviors between cultivars. Water mobility alone did not explain quinoa seed longevity after storage under these experimental conditions. © 2010 Blackwell Publishing.
author	Castellión, Martina Laura Buera, María del Pilar
author_facet	Castellión, Martina Laura Buera, María del Pilar
author_sort	Castellión, Martina Laura
title	Molecular Mobility and Seed Longevity in Chenopodium quinoa
title_short	Molecular Mobility and Seed Longevity in Chenopodium quinoa
title_full	Molecular Mobility and Seed Longevity in Chenopodium quinoa
title_fullStr	Molecular Mobility and Seed Longevity in Chenopodium quinoa
title_full_unstemmed	Molecular Mobility and Seed Longevity in Chenopodium quinoa
title_sort	molecular mobility and seed longevity in chenopodium quinoa
publishDate	2010
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97808138_v_n_p647_Castellion http://hdl.handle.net/20.500.12110/paper_97808138_v_n_p647_Castellion
work_keys_str_mv	AT castellionmartinalaura molecularmobilityandseedlongevityinchenopodiumquinoa AT bueramariadelpilar molecularmobilityandseedlongevityinchenopodiumquinoa
_version_	1768545212008759296

Molecular Mobility and Seed Longevity in Chenopodium quinoa

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