Effects of cold-dark treatment on fructan metabolism in barley [Hordeum vulgare]
1995
Yukawa, T. (Hokuriku National Agricultural Experiment Station, Joetsu, Niigata (Japan)) | Watanabe, Y. | Yamamoto, S.
To clarify the relationship between fructans and snow tolerance in barley (Hordeum vulgare L. cv. Minorimugi), changes in fructans and fructan hydrolase were studied at 3 degrees C in darkness and after the treatment. Concentration of fructans in basal stem decreased under the treatment, while activities of phleinase (beta-2,6 fructan hydrolase) and inulinase (beta-2,1 fructan hydrolase) remained constant. Inulinase activity was higher than phleinase. During the recovery at 20 degrees C under light condition after the cold-dark treatment, phleinase activity increased rapidly and decreased thereafter. The concentration of fructans was inversely related to the activity of phleinase, while inulinase remained at a low level. Functions of inulinase and phleinase under snow and after thaw were discussed
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