Abstract
In the present paper, we deal with the influence of three culture medium, water culture, glass beads culture and sand culture on polysaccharide-exudates from Italian ryegrass and alfalfa roots. The results are summarized as follows ; 1) Root-system in water culture was distributed straight and that in particle cultures such as glassbeads and sand were increased in root number and individual root became fine and crooked. 2) On both forages, there were lots of polysacchride-exudates in particle culture. In case of glucose, for example, exudates in particle culture were approximately six to seven times as much as exudates in water culture. 3) It is considered that the roots which touched with particles are subject to physical impetus and, as a consequence, polysaccharide-exudates in particle culture seemed to increase.
