COMPOSITION OF CARBOHYDRATES AND SOLUBLE SOLIDS, MOISTURE AND MORPHOLOGICAL CHANGES IN WHEAT PLANTS GROWN ON COPPER-DEFICIENT SOIL

概要

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When wheat plants were grown on Cu-deficient soil, a marked decrease in nonreducing sugars was observed in culms and leaves during the flag leaf stage as well as in ears and leaf blades during the flowering period. The Brix degree (%) of soluble solids in culms was 6-7% in the first internode and 10-15% in the fifth internode in the case of wheat plants grown on Cu-deficient soil, whereas it reached 7-8% and 23-27%, respectively, in the case of plants grown on a plot to which Cu was supplied. It follows that in the former group soluble solid contents were lower than in the latter. The moisture of the former was 74-76% against 67-69% in the latter during the flowering period, showing a fairly large difference. As a result, the leaves of wheat plants grown on Cu-deficient soil tended to droop on rainy or cloudy days and when it was windy or sunny the tips of the leaves became dry and curled up. Then, some of the leaves in a higher position in the plant often showed such deformation as twisting and/or withering after repeated drooping and curling up with the changes in atmospheric humidity, although in the case of wheat plants on a plot to which Cu was supplied the leaves kept a constant shape.
社団法人日本土壌肥料学会の論文