Abstract
CARBOHYDRATE synthesis in the barley plant displays two distinct phases, associated respectively with vegetative development and the succeeding period of ear development. The first phase is characterized by the irreversible synthesis of polysaccharides of the cellulose type based on C6 and C5 sugar and uronic acid units, which compounds account for 75 per cent of the carbon assimilated before the ear shoots. Starch appears only rarely, locally and in small amounts. The second phase is concerned almost exclusively with starch synthesis, and this substance, accumulated solely in the grain, may constitute 30 per cent of the total dry weight attained and more than half the dry matter of the ear.
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ARCHBOLD, H. Some Factors Concerned in the Process of Starch Storage in the Barley Grain. Nature 156, 70–73 (1945). https://doi.org/10.1038/156070a0
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DOI: https://doi.org/10.1038/156070a0
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