The Growth of a Midwestern Strain of Sorghum halepense Under Controlled Conditions

Ingle, M., and B. J. Rogers. (Purdue U., Lafayette, Indiana.) The growth of a midwestern strain of Sorghum halepense under controlled conditions. Amer. Jour. Bot. 48(5): 392–396. Illus. 1961.—This grass, adapted to midwestern growing conditions, increased growth up to 32°C. under long-day conditions (16 hr.). In a 12-hr. photoperiod, growth increased up to 27°C; at 32°C. growth was reduced. Flowering usually occurred under photoperiods of 12 hr. or less, but this requirement was not absolute. Rhizome bud sprouting was found to be proportional to temperature. Regardless of the environmental conditions and variations tested, all buds on the rhizomes developed into aerial shoots and never into rhizomes.