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PHYSIOLOGICAL PROBLEMS RAISED BY COLD-HARDINESS.

LES PROBLEMES PHYSIOLOGIQUES POSES PAR LA RESISTANCE AU GEL.

Author(s) : ULRICH R.

Type of article: Periodical article

Summary

THESE PROBLEMS ARE CONCERNED WITH THE WAY OF CHARACTERISING THE COLD-HARDINESS OF PLANTS WITH NUMERICAL EXPRESSIONS, THEN ITS VARIABILITY FACTORS: EXTERNAL FACTORS (TEMPERATURE, LIGHT, WATER) AND FACTORS DEPENDING ON PLANT CHARACTERISTICS (VARIETIES, VARIOUS PARTS, GROWING STAGE, HYDRATION). ANOTHER PROBLEM IS RAISED BY COLD-HARDINESS MECHANISMS LEADING TO VARIOUS ASSUMPTIONS STILL DEBATED ; IT IS NECESSARY TO STUDY HOW TO PREVENT TISSUE TEMPERATURE FROM DECREASING BELOW THE FREEZING POINT: SELECTION OF GROWING AREAS, CONTROL OF SOIL RADIATION, DIRECT HEAT SUPPLY, WATERING. IT IS IMPORTANT TO SELECT OR OBTAIN COLD-HARDY VARIETIES, MAINTAINING THE PLANTS IN A COLD-HARDINESS STATE (DELAYED GROWTH OR FLOWERING). IN ADDITION, ONE MAY ATTEMPT TO INCREASE RESISTANCE BY HYBRIDISATION, BY COLD-HARDENING (TEMPERATURE, LIGHT), BY DEHYDRATION OR BY MAINTAINING LOW HUMIDITY AND BY THE SUPPLY OF MATERIALS, THE STUDY OF WHICH SHOULD BE FURTHERED. G.G.

Details

  • Original title: LES PROBLEMES PHYSIOLOGIQUES POSES PAR LA RESISTANCE AU GEL.
  • Record ID : 1984-1874
  • Languages: French
  • Source: Sel. fr. - n. 31
  • Publication date: 1983
  • Document available for consultation in the library of the IIR headquarters only.

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