Diaspores of winterfat (Eurotia lanata (Pursh) Moq.) collected from 2 locations in the USA and 1 in Canada were imbibed at 10 degree C and grown to 4 different developmental stages (2, 3, 6, and 14 days of incubation), then subjected to cooling temperatures as low as -30 degree C. Differential thermal analysis was used to detect exotherms associated with ice crystal formation in germinants. The temperature at which exotherms occurred was recorded, and the subsequent growth and mortality of germinants were determined. Only 1 exotherm was observed, and that occurred in the low-temperature exotherm range (usually < -10 degree C). Changes in the freezing tolerance of germinants from seed to seedling was a gradual process as indicated by increases in exothermic temperature and mortality with increasing developmental stage. Whether the exotherm indicated a lethal event depended on the developmental stage of the germinant. Germinant survival was also affected by cooling below the exotherm temperature. The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from OJS platform August 2020
Scholarly peer-reviewed articles published by the Society for Range Management. Access articles on a rolling-window basis from vol. 1, 1948 up to 5 years from the current year. Formerly Journal of Range Management (JRM). More recent content is available by subscription from SRM.