Vilardo AFRM, Silva Lima GD, Cordeiro LS, Albarello N, Simoes-Gurgel C. Application of d cryo-plate technique for the cryopreservation of in vitro-grown shoot tips of Tarenaya spinosa (Cleomaceae).
Cryo Letters 2023;
44:333-342. [PMID:
38311927]
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Abstract
BACKGROUND
Tarenaya spinosa is a medicinal species used for treating respiratory and inflammatory diseases. Various biotechnological studies have been developed for in vitro establishment of plants and long-term conservation of this species.
OBJECTIVE
This study aimed to establish a new cryopreservation protocol using the D cryo-plate technique for in vitro-grown shoot tips of T. spinosa.
MATERIALS AND METHODS
Different steps of the cryopreservation procedure were evaluated in this work: preculture; sucrose concentration of calcium alginate gel; concentration and time of exposure to osmoprotective loading solution; time of exposure to silica gel; and regrowth on recovery medium.
RESULTS
The optimal procedure included preculture with increasing sucrose concentration (from 0.25 to 0.50 M), encapsulation and dehydration over silica-gel for 60 min. Increasing sucrose concentration in the loading solution or exposure duration had a negative effect on recovery of cryopreserved shoot tips. However, the association of calcium alginate gel enriched with 0.6 M sucrose with post-rewarming culture with BAP for 2 weeks resulted in the most efficient cryopreservation protocol (76% survival and 70% shoot recovery).
CONCLUSION
The plants developed after cryopreservation maintained their in vitro multiplication capacity and demonstrated the efficiency of long-term conservation by D cryo-plate technique for T. spinosa. Doi.org/10.54680/fr23610110512.
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