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Deep Supercooling in Roses1 2

Channa B. Rajashekar, Harold Melvin Pellett, Morgan Burke

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Abstract

Abstract Deep supercooling of stem tissue water was found in all the native species of rose ( Rosa spp.) studied. Freezing of this supercooled water was associated with injury to the stems, indicating that maximum cold hardiness of these species is limited to about −40°C. Therefore, these species have some potential for use in breeding to develop cold-hardy cultivated roses, but their hardiness would be limited to −40°C by the supercooling characteristic.

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Abstract Deep supercooling of stem tissue water was found in all the native species of rose ( Rosa spp.) studied. Freezing of this supercooled water was associated with injury to the stems, indicating that maximum cold hardiness of these species is limited to about −40°C. Therefore, these species have some potential for use in breeding to develop cold-hardy cultivated roses, but their hardiness would be limited to −40°C by the supercooling characteristic.

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Available abstract

Abstract Deep supercooling of stem tissue water was found in all the native species of rose ( Rosa spp.) studied. Freezing of this supercooled water was associated with injury to the stems, indicating that maximum cold hardiness of these species is limited to about −40°C. Therefore, these species have some potential for use in breeding to develop cold-hardy cultivated roses, but their hardiness would be limited to −40°C by the supercooling characteristic.

Key concepts: Supercooling, Hardiness (plants), Botany, Biology, Horticulture, Freezing tolerance, Geography, Cultivar

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