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Effet de l'acide abscisique, du durcissement dû au froid et de la période d'exposition à la lumière sur la récupération des pointes de pousses de bouleau ayant été cryoconservées in vitro.

Effect of abscissic acid, cold hardening, and photoperiod on recovery of cryopreserved in vitro shoot tips of silver birch.

Auteurs : RYYNANEN L.

Type d'article : Article

Résumé

Recovery of cryopreserved in vitro shoot tips of silver birch was doubled by incorporating abscisic acid (ABA) in the culture medium during cold hardening of the mother shoots. The average recovery of shoot tips was over 40% after cold hardening for 28 days at 5 deg C under an 8/16 light/dark photoperiod on medium containing 0,0001 mole ABA. ABA was effective in combination with low temperature and short daylength only, although large genotypical differences were noted. ABA had two different effects: it enhanced cold hardening and increased callus formation during regeneration of cryopreserved shoot tips.

Détails

  • Titre original : Effect of abscissic acid, cold hardening, and photoperiod on recovery of cryopreserved in vitro shoot tips of silver birch.
  • Identifiant de la fiche : 1999-1235
  • Langues : Anglais
  • Source : Cryobiology - vol. 36 - n. 1
  • Date d'édition : 02/1998

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