Sorghum [Sorghum bicolor (L.) Moench] is grown throughout the world as a cereal grain crop, and is also planted in the United States as a green manure or cover crop. Injury to some plants grown in rotation with sorghum first suggested that thise species was allelopathic. Allelopathy, the ability of a plant to suppress the growth of other plants in its vicinity by producing phytotoxins, is in the case of sorghum associated with the production of an exudate from its root hairs (Fig. 7.1).
展开▼
