CARBOHYDRATE RESERVES IN THE REGROWTH OF COCKSFOOT (<i>DACTYLIS GLOMERATA</i> L.)*

Abstract

A brief description of some physiological aspects concerning carbohydrate reserves is given. The concentration of these substances depends on rates of photosynthesis, respiration, translocation and synthesis of structural compounds. Immediately following severe defoliation, current photosynthesis and carbohydrate reserves cannot meet the demand for growth and other fractions (possibly protein) are remobilized. The amount of growth made during the first few days is related to amounts of carbohydrate present but over longer periods other factors dominate. Defoliation also results in large decreases in the rates of root extension and uptake of minerals.