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- W4220708060 abstract "More than 50% out of 129 of Agave species are endemic to Mexico. Among them, Agave peacockii is among the list of threatened species that require special protection. In this work, we aimed at developing new supplementary strategies to achieve micropropagation and perform cryopreservation of in vitro grown shoot-tips of A. peacockii. For multiplication, the addition of two cytokinins, 6-benzylaminopurine (26.6 μM) and kinetin (27.84 μM) to MS semisolid medium significantly favoured the morphogenetic response and produced the highest (87.00 ± 17.18) shoot generation number after 60 days of culture. This interaction was more effective than using the same growth regulators separately. Propagated and rooted plantlets were acclimatized with 100% survival and normal morphological development. For cryopreservation, an optimized protocol following droplet-vitrification allowed obtaining 98% and 96% regrowth before and after cryopreservation, respectively. Shoot-tips (1 mm in length × 1 mm wide) were excised of in vitro-propagated plants, subjected to preculture on MS semisolid medium with 0.3 M sucrose for 1d, loaded in solution with 0.4 M sucrose and 1.6 M glycerol for 20 min, exposed to Plant Vitrification Solution 2 for 15 min, and then, immersed in liquid nitrogen in droplets of PVS2 placed on aluminium foil strips. The vegetative growth of cryo-derived plants and of the in vitro propagated plants was compared under greenhouse conditions. No significant differences were detected in most assessed characteristics after 120 days of culture. The results presented here constitute new viable biotechnological approaches for the in vitro propagation and long-term conservation of endangered Agave germplasm. Agave peacockii shoot micropropagation was induced combining 6-benzylaminopurine (BAP) and 6-furfuryl-aminopurine (kinetin). A droplet-vitrification protocol was optimized to cryopreserve shoot-tips. Greenhouse performance of in vitro and cryo-derived plants was similar." @default.
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- W4220708060 date "2022-02-24" @default.
- W4220708060 modified "2023-10-02" @default.
- W4220708060 title "New approaches for micropropagation and cryopreservation of Agave peacockii, an endangered species" @default.
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- W4220708060 doi "https://doi.org/10.1007/s11240-022-02246-z" @default.
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