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Abstract
Clonal propagation of ginger (Zingiber officinale Roscoe) was achieved by in vitro culture using buds from rhizomes in storage on a medium consisting of Murashige-Skoog major elements, Ringe-Nitsch minor elements and vitamins, 2% sucrose, and 1 ppm 6-benzylaminopurine (BA). Numerous adventitious shoots with roots were produced by repeated subculture of individual plantlets on 1 ppm BA medium. Rooted plantlets were successfully transferred to a mixture of 2 peat:1 sponge rock:1 vermiculite in the greenhouse and eventually to full sun in the nursery.
Abstract
Sulfur-containing compounds, H2S, SO2, allyl sulfide, and allyl isothiocyanate broke dormancy in gladiolus (Gladiolus x Tubergenii Hort., Gladiolus spp.), Platycodon grandiflorum A. DC., or tree peony (Paeonia suffruticosa Andr.). A 1% H2S treatment for 1-8 hr was most effective with the least phytotoxicity. Garlic paste/vapor, which included allyl sulfide, also was effective. H2S, allyl sulfide and garlic vapor increased the respiration rate of tubers in Platycodon grandiflorum within 15 hr after treatment.
The effects of chitosan treatment on plant growth and flower quality of Eustoma grandiflorum (Raf.) Shinn. were investigated. The application of a soil mix of chitosan (1%, w/w) at sowing time remarkably enhanced growth, whereas coating seed with 0.1% chitosan in lactate was ineffective. Plants grown in the chitosan-treated soil flowered 15 days earlier than did control plants, and the number and weight of cut flowers produced were greater than for control plants or plants from chitosan-treated seed. Chemical name used: poly-(1→4)-β-D-glucoseamine (chitosan).
Abstract
Volatiles from garlic and horseradish paste broke corm dormancy of springflowering gladiolus (Gladiolus × Tubergenii Hort. Effective substances in garlic were allyl sulfide, methyl disulfide, n-propyl disulfide, and those in horseradish were allyl sulfide, allyl isothiocyanate, and n-propyl sulfide. Monosulfide extracted from garlic paste, allyl sulfide, and allyl disulfide were effective in breaking corm dormancy of summer-flowering gladiolus (Gladiolus spp.). Methyl disulfide promoted sprouting and flowering of tree peony (Paeonia suffruticosa Andr.) and flowering of ornamental cherry (Prunus spp.) without phytotoxic symptoms.