title: Effects of plant growth regulators on survival and recovery growth following cryopreservation.
abstract: Studies on the effects of plant growth regulators (PGRs) on survival, recovery and post-recovery growth of shoot apices following cryopreservation are limited. In this study, the effects of plant growth regulators in both the culture phase and the recovery phase of cryostorage were examined for the rare plant species, Anigozanthos viridis ssp terraspectans Hopper. Survival of shoot apices was not correlated to cytokinin or auxin treatments administered in culture media prior to cryostorage. In recovery media, the plant growth regulators, kinetin, zeatin (cytokinins), IAA, (auxin) and GA3 were examined for their effect following cryopreservation. It was found that the application of a combination of cytokinin and 0.5 microM GA3 from day zero was the most appropriate for obtaining vigorously growing plantlets following LN immersion. This combination proved to be more effective than basal medium, zeatin or kinetin treatments.
authors.affiliation: Kings Park and Botanic Garden, West Perth, WA, 6005, Australia. turnersr@pop.ses.curtin.edu.au
authors.forename: S R
authors.initials: SR
authors.lastname: Turner
authors.forename: D H
authors.initials: DH
authors.lastname: Touchell
authors.forename: T
authors.initials: T
authors.lastname: Senaratna
authors.forename: E
authors.initials: E
authors.lastname: Bunn
authors.forename: B
authors.initials: B
authors.lastname: Tan
authors.forename: K W
authors.initials: KW
authors.lastname: Dixon
mesh_terms: D015925:Cryopreservation; D017077:Culture Media, Conditioned / Q000494:pharmacology*; D003583:Cytokinins / Q000494:pharmacology; D010937:Plant Growth Regulators / Q000494:pharmacology*; D018521:Plant Physiological Phenomena / Q000187:drug effects*; D018520:Plant Shoots / Q000187:drug effects*; D012038:Regeneration / Q000187:drug effects; D015996:Survival Rate; D013997:Time Factors
chemical_list: D017077:Culture Media, Conditioned; D003583:Cytokinins; D010937:Plant Growth Regulators