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- Author or Editor: William E. Kusey Jr. x
Shoot tips, 1.5 cm long, of Gypsophila paniculata (baby’s breath), were proliferated on modified Murashige and Skoog salts, 30 g/liter sucrose, 7 g/liter agar, 0.4 mg/liter thiamine-hydrochloric acid (thiamine·HCL), 100 mg/liter myo-inositol with 0.05 mg/liter napthalene-acetic acid (NAA) plus 1.0 mg/liter 6-benzylamino purine (BA). Cultured shoots rooted on White’s medium after treatment of bases with NAA or indolebutyric acid (IBA).
Terminal cuttings of Gypsophila paniculata L. cv. Bristol Fairy rooted and established well in peat cylinders or foam or cellulose fiber blocks. Rooting was improved by a 5 or 30 second basal dip using indolebutyric acid (IBA) at 3,000-10,000 mg/liter 45% ethanol.
Gypsophila paniculata L. cv. Bristol Fairy flowered only under long photoperiods. Neither 5°C storage up to 8 weeks nor weekly GA3 sprays at concentration from 50 to 2,000 mg/liter induced flowering at short photoperiods. Established shoots with 12 nodes flowered after 3 weeks of 24 hours photoperiod induction, but young shoots with 5 nodes (newly pinched plants) did not flower after 3 weeks of induction. Critical photoperiod of several selections of ‘Bristol Fairy’ ranged from 12-18 hours. Inadvertent selection of clones with longer critical photoperiods appears to be responsible for poor winter flowering in Florida.