Cryopreservation of auricula shoot tips using the encapsulation/dehydration technique

Area of Science:

• Plant Biotechnology
• Cryobiology
• Horticulture

Background:

• In vitro conservation of plant genetic resources is crucial for biodiversity.
• Cryopreservation offers long-term storage of plant material.
• The florist's auricula (Primula vulgaris) is a commercially important ornamental plant.

Purpose of the Study:

• To establish an efficient cryopreservation protocol for florist's auricula shoot tips.
• To evaluate the encapsulation-dehydration technique for cryopreserving this species.

Main Methods:

• Shoot tips were encapsulated in calcium alginate beads.
• Preculture involved 2 weeks cold acclimatization followed by incubation in sucrose and mannitol.
• Dehydration using silica gel preceded plunging into liquid nitrogen.

Main Results:

• Successful cryopreservation of encapsulated shoot tips was achieved.
• Post-thaw growth was observed without callus formation.
• Frozen and non-frozen shoot morphology remained comparable.

Conclusions:

• The encapsulation-dehydration method is effective for cryopreserving florist's auricula.
• Preculture with sucrose and mannitol is vital for successful cryopreservation.
• This technique preserves the genetic integrity and morphology of the plant material.