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Seasonal changes in frost hardiness in cloudberry (Rubus chamaemorus) in relation to carbohydrate content with special reference to sucrose
Author(s) -
Kaurin Ase,
Junttila Olavi,
Hanson Jürgen
Publication year - 1981
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1981.tb08512.x
Subject(s) - hardiness (plants) , rhizome , frost (temperature) , sucrose , chemistry , botany , sugar , rubus , horticulture , biology , food science , meteorology , physics , cultivar
Monthly determinations of frost hardiness of cloudberry ( Rubus chamaemorus L.) buds and rhizomes were done from October 1978 to October 1979. For buds LT 50 (lethal temperature for 50% of the plant material) was calculated from the percentage of bud breaking and for rhizomes from visual estimations of the degree of coloring by triphenyltetrazolium chloride. The frost hardiness varied from—11.5°C in November to—4°C in May to July for buds and from—16°C in January to—3°C in June— July for rhizomes. Dehardening started in February while the plants were still covered with snow. In connection with the determinations of frost hardiness, carbohydrate analyses were done. There was a good correlation between the degree of frost hardiness and the amount of soluble carbohydrates determined with anthrone. Sucrose, determined by gas chromatography, seemed to be the sugar contributing most in this correlation.