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Interaction of free auxins with ascorbic acid and glutathione during wheat seed germination. I. Quantitative investigations of free auxins, ascorbic acid and glutathione in germinating wheat seeds of varying viability



Interaction of free auxins with ascorbic acid and glutathione during wheat seed germination. I. Quantitative investigations of free auxins, ascorbic acid and glutathione in germinating wheat seeds of varying viability



Acta Soc Bot Pol 33(4): 689-704



Wheat grains normally germinated and of normal viability, identical wheat grains but germinated in anaerobic conditions, and wheat grains of low viability were used. The content of auxins, ascorbic acid and glutathione was studied in dry grains every day to the 7th day of germination. The content of free auxins of normally germinating wheat grains increases in the beginning (as to the 2nd day) afterwards falls slowly. In wheat germinating in anaerobic conditions the content of auxins increases in the beginning, though slaver than in normal grains, and does not alter very much later on. In grains of low viability the changes of the contents of the auxins are insignificant and are not proved statistically, so as in anaerobically germinated grains. In the dry wheat grains ascorbic acid was not confirmed, but during the germination the content of ascorbic acid grew rapidly. In wheat grains germinated in anaerobic conditions no ascorbic acid was confirmed as to the 7th day. In grains of low viability the content of ascorbic acid was approximately proportional to the germinating power, e.g. if the grains of low viability germinated in 10%, the content of ascorbic acid in the whoe experiment amounts also 10%, compared with normal grains. In normally germinating wheat grains the content of glutathione increased quickly, reaching on the 7th day a more than double value compared with the content in the dry grain. The changes in the content of glutathione in grains germinated in anaerobic conditions and of low viability was insignificant. The content of free auxin did not change during the germination of normal grains, or in grains with low viability, both germinated in aerobic and anaerobic conditions contrary to the ascorbic acid and glutathione quantity which was different depending on the kind of the analyzed grains.

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