Carbohydrate metabolism of Johnson grass
1947
Rapp, K.E.
The growth and carbohydrate content of Johnson grass grown in pots were observed over the period of a year. During the early stages of growth, metabolic reactions favored the formation of glucose to support the young sprouts, and carbohydrate reserves in the rhizome were actually depleted before the occurrence of shooting. As the plant developed, sucrose became the predominant carbohydrate and remained so in all parts of the plant well into the growing season. After maturity was reached, the carbohydrate in the top was transported as glucose to the rhizome where it was reconverted to sucrose for winter storage. Considered as a cultivated crop on soils subject to excessive erosion, Johnson grass could easily become an important factor in our soil economy. With this grass, a forage crop is made available which may be pastured or cut for hay or an underground crop furnishing carbohydrates for livestock feeding, sugar and syrup manufacture, or industrial alcohol production. The plant's carbohydrate metabolism in producing seed is the key to the success of control or eradication measures based on prevention of seed formation by repeated early plowing or mowing.
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