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FREEZING RESISTANCE OF ORNAMENTAL TREES AND SHRUBS.

Author(s) : SAKAI A.

Type of article: Article

Summary

FREEZING RESISTANCE OF WINTER TWIGS FROM ABOUT 300 TREE SPECIES AND CULTIVARS NATIVE TO DIFFERENT CLIMATES IN THE WORLD WAS ASSESSED. DORMANT 1-YEAR-OLD TWIGS COLLECTED FROM MATURE TREES WERE ARTIFICIALLY HARDENED. ALMOST ALL OF THE TREES, WHICH RANGED FROM TROPICAL TO SUBTROPICAL IN BOTH ASIA AND AMERICA, SUSTAINED FREEZING INJURY TO SOME OF THEIR TISSUES AT TEMPERATURES BELOW 268 K (-5 DEG C). EVERGREEN AND DECIDUOUS BROAD-LEAVED TREES NATIVE TO WARM-TEMPERATE CLIMATES SURVIVED FREEZING AT 266 TO 253 K (-7 TO -20 DEG C). IN GENERAL, FLOWER BUDS WERE FAR LESS RESISTANT THAN VEGETATIVE BUDS. WINTER MINIMUM TEMPERATURE IS AMONG THE IMPORTANT FACTORS GOVERNING THE NORTHERN LIMITS OF CULTIVATED PLANTS.

Details

  • Original title: FREEZING RESISTANCE OF ORNAMENTAL TREES AND SHRUBS.
  • Record ID : 1983-0498
  • Languages: English
  • Source: J. am. Soc. hortic. Sci. - vol. 107 - n. 4
  • Publication date: 1982/07
  • Document available for consultation in the library of the IIR headquarters only.

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