
Cryopreservation of plant species is poorly investigated in Brazil. The aim of this study was to cryopreserve Byrsonima intermedia shoot apical meristems through droplet vitrification. A culture medium for shoot-tips growth was established using the Woody Plant Medium supplemented with 2.22 uM 6-benzylaminopurine. Excised shoot-tips were subjected to pre-culture and/or post-culture treatments on Murashige and Skoog medium with 0.3 M sucrose for 24 h prior dehydration on PVS2 at 0°C for 15, 30 or 45 minutes prior to plunging in liquid nitrogen. The effect of 15 days of shoot pre-growth on a high osmotic medium (0.3 M sucrose or 0.21 M sorbitol + 0.09 M sucrose) prior to meristem excision and cryopreservation was also investigated. Pre-culturing shoot-tips on 0.3 M sucrose for 24 h prior to cryopreservation increased the regrowth level after thawing to 90%. Shoot-tips excised from shoots pre-grown on MS + 0.21 M sorbitol + 0.09 M sucrose for 15 days presented a satisfactory regrowth level (67%).
Cryopreservation, Sucrose, Plants, Medicinal, Post-culture effect, Pre-growth effect, Medicinal plant, Meristem, Pre-culture effect, Kinetin, Vitrification, Cryoprotective Agents, Purines, Benzyl Compounds, Sorbitol, Plant Shoots, Malpighiaceae
Cryopreservation, Sucrose, Plants, Medicinal, Post-culture effect, Pre-growth effect, Medicinal plant, Meristem, Pre-culture effect, Kinetin, Vitrification, Cryoprotective Agents, Purines, Benzyl Compounds, Sorbitol, Plant Shoots, Malpighiaceae
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