Electron paramagnetic resonance (EPR) spectroscopy characterization of wheat grains from plants of different water stress tolerance

doi:10.1016/j.jplph.2012.04.020

Electron paramagnetic resonance (EPR) spectroscopy characterization of wheat grains from plants of different water stress tolerance

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Electron paramagnetic resonance (EPR) spectroscopy characterization of wheat grains from plants of different water stress tolerance

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Bibliographic description

punktacja MNiSW [2012 A]: 35

title:	Electron paramagnetic resonance (EPR) spectroscopy characterization of wheat grains from plants of different water stress tolerance
author:	Łabanowska Maria , Filek Maria, Kurdziel Magdalena , Bednarska Elżbieta, Dłubacz Aleksandra, Hartikainen Helina
journal title:	Journal of Plant Physiology
volume:	169
issue:	13
date of publication :	2012
pages:	1234-1242
ISSN:	0176-1617
eISSN:	1618-1328
DOI:	10.1016/j.jplph.2012.04.020
language:	English
journal language:	English
abstract in English:	Grains of five genotypes of wheat (four Polish and one Finnish), differing in their tolerance to drought stress were chosen for this investigation. Electron paramagnetic resonance spectroscopy allowed obser- vation of transition metal ions (Mn, Fe, Cu) and different types of stable radicals, including semiquinone centers, present in seed coats, as well as several types of carbohydrate radicals found mainly in the inner parts of grains. The content of paramagnetic metal centers was higher in sensitive genotypes (Radunia, Raweta) than in tolerant ones (Parabola, Nawra), whereas the Finnish genotype (Manu) exhibited inter- mediate amounts. Similarly, the concentrations of both types of radicals, carbohydrates and semiquinone were significantly higher in the grains originating from more sensitive wheat genotypes. The nature of carbohydrate radicals and their concentrations were confronted with the kinds and amounts of sugars found by the biochemical analyses and microscopy observations. It is suggested that some long lived radicals (semiquinone and starch radicals) occurring in grains could be indicators of stress resistance of wheat plants.
keywords in English:	carbohydrate radicals, EPR, semiquinone radicals, stress tolerance, wheat grains
departmental parameterization:	35
affiliation:	Wydział Chemii : Zakład Chemii Nieorganicznej
type:	journal article
subtype:	academic paper

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