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Frost Tolerance (% Survival) of Wheat, Barley and Oats

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Frost Tolerance (% Survival) of Wheat, Barley and Oats

TemperatureF

*+ = plants sprayed with ice-nucleating active bacteria.

*- = plants sprayed with distilled water;

a-c means in the same row followed by the same letter are not significantly different (P = 0.05)

The information above was taken from research conducted in a greenhouse and the plants were exposed to the freezing temperatures in small pots. Whether or not this information can be related directly to the field is not known. Small grains have adapted to cool temperatures beyond leaf tolerance to frost. The growing point in small grains is located below the soil level until the jointing stage of growth. Usually the soil temperature does not drop as low as the air temperature and the below soil plant parts are protected.

Adapted from Gusta and O'Connor, 1987.