Fig. 1
From: Development, progress and future prospects in cryobiotechnology of Lilium spp.
Major steps of Lilium cryopreservation for shoot tips (A), pollen (B) and seeds (C). Shoot tip cryopreservation by droplet-vitrification (1 in A [35]; 2 in A [34, 43]), vitrification (3 in A [30, 31]), encapsulation–vitrification (4 in A [30]), and encapsulation–dehydration (5 in A [30]). Pollen cryopreservation by dehydration (B [53]). Seed cryopreservation by encapsulation–dehydration (1 in C [29]), glycerol treatment (2 in C [29]) and dehydration (3 in C [29])