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Influence of chilling and freezing on seed quality and germination ability.

Influence de la réfrigération et de la congélation sur la qualité et I'aptitude à la germination des graines.

Author(s) : CÔME D.

Type of article: Article, IJR article

Summary

The high dehydration levelof seeds provides them with an exceptional survival period, nevertheless seeds are riving organs which can die. Refrigeration can prevent the germination of seeds which are destined for human or animal consumption or, on the contrary, produce germination in a required time. The article first describes some of the biological particularities of seeds which can be considered as survival or reproductive organs. As a survival organ, refrigeration can be used to preserve seeds to: (a) Prevent germination: the storage of seeds of tropical and sub-tropical origin at +5°C: the maintenance of a cold and dry atmosphere for the bulk storage of seeds in silos. (b) Prevent parasitic attack: a low temperature and low relative humidity to protect against bacterial or fungal growth: it is more difficult to combat insect invasion. (c) Protect product viability: the drier the seed and the lower the temperature, the longer the seed rife. Refrigeration can also be used to facilitate germination by eliminating dormancy. It is already well known that humid cold promotes germination by eliminating embryonic dormancy (in general, from one to a few months at a temperature of about +5°C). Furthermore, good germination of "hard seeds" (with teguments impermeable to water) can be obtained by immersing them in liquid nitrogen and repeating the operation if necessary.

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Pages: 333-336

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Details

  • Original title: Influence de la réfrigération et de la congélation sur la qualité et I'aptitude à la germination des graines.
  • Record ID : 30001027
  • Languages: French
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 5 - n. 6
  • Publication date: 1982/11

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