ISHS Acta Horticulturae 168: II Symposium on Winter Hardiness in Woody Perennials
TYPE OF WINTER INJURIES OF FRUIT PLANTS AND THEIR RECOVERY |
| Author: | G. Gogoleva |
| Abstract:
The article presents results of long standing apple tree frost resistance at different levels, i,e. in tissues, organs and the whole plant. Modeling of low temperature stresses for isolated plant organs and tissues under controlled conditions enabled us to show the role of temperature and the physiological state of plants in different types of frost injuries. Severe winter of 1978) 1979 demonstrated the danger of xylem and bark of perennial branches being injured by frost, rate of regeneration processes and frost injury aftereffects on the patterns of terminal and radial growth, activity of root system, rate of acclimation and frost resistance. After killing, the tree crown may recover in 1–2 years. Following phloem injury of main branches and trunk the recovery of plant was longer as it was accompanied by intensive dying out of slightly injured tissues and organs, retarding the root system activity, and by additional frost injuries during recovery. | |
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