Cryopreservation of Thymus lotocephalus shoot tips and assessment of genetic stability.
Cryo Letters
; 35(2): 119-28, 2014.
Article
en En
| MEDLINE
| ID: mdl-24869644
ABSTRACT
BACKGROUND:
Thymus lotocephalus is a rare endemic species from the Algarve, Portugal, and is legally protected by Portuguese and European legislation.OBJECTIVE:
The aim is to develop a cryopreservation protocol for T. lotocephalus shoot tips, as an alternative approach for the long-term conservation of this species.METHODS:
Several methods (droplet-vitrification, vitrification and encapsulation-dehydration) were tested. Conditions regarding the subculture period, cold-hardening and preculture were optimized. Cryopreserved shoot tips were also assessed for their genetic stability using RAPD markers.RESULTS:
Droplet-vitrification presented the best results. The best regrowth of cryopreserved shoot tips obtained eight weeks after rewarming was 67%. This was accomplished with four weeks subculture period of in vitro-donor plants at 25 degree C, preculture of excised shoot tips for one day on MS medium containing 0.3 M sucrose, treatment in PVS2 for 60 min, and MS supplemented with 0.2 mg per L zeatin as recovery medium. The assessment using RAPD markers observed variation at a low frequency and shoots regenerated from cryopreserved apices showed normal development compared to the regular in vitro-grown shoots.CONCLUSION:
Droplet-vitrification is thus a viable method for the cryopreservation of T. lotocephalus shoot tips.
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Bases de datos:
MEDLINE
Asunto principal:
Criopreservación
/
Brotes de la Planta
/
Genoma de Planta
/
ADN de Plantas
/
Thymus (Planta)
/
Vitrificación
Tipo de estudio:
Guideline
País/Región como asunto:
Europa
Idioma:
En
Revista:
Cryo Letters
Asunto de la revista:
BIOLOGIA
/
QUIMICA
Año:
2014
Tipo del documento:
Article
País de afiliación:
Portugal