The distribution of endogenous gibberellins in Dwarf-1, a single gene dwarf mutant of Mexico 80-R red beans, was studied. Parallel extraction and fractionation of seeds of this mutant and those of a normal homozygous line followed by thin layer chromatography and bioassays using Rumex obtusifolius, wheat seed endosperm and dwarf bean plants revealed that a stem elongation control factor was con...

Gibberellin A(1)-3,4-(3)H was prepared by selective catalytic reduction of gibberellic acid with a mixture of tritium and hydrogen. (3)H-GA(1) was applied at physiological concentrations to dwarf peas and the metabolism of the hormone was investigated. (3)H-GA(1) was converted to an acidic, biologically active compound. Radioactive but biologically inactive compounds were also found in the neut...

; Azospirillum spp. are endophytic bacteria with beneficial effects on cereals — effects partially attributed to gibberellin production by the microorganisms. Azospirillum lipoferum and Azospirillum brasilense inoculated to rice dy mutant reversed dwarfism in seedlings incubated with [17,17-H2]GA20 with formation of [17,17H2]GA1, showing the in vivo capacity to perform the 3 -hydroxylation. Whe...

the zinnia (zinnia elegans j.) flower has many applications in landscape design, whereas lack of adequate conditions and nutritions in some cases can reduce the quality and number of flowers. therefore, control of growth conditions is very important related to nutrition and application of growth regulators to improve the quality and quantity of flowers. flower's morphology and longevity are two...

Protocorm pieces of the orchid Cymbidium were aseptically cultured either without phytohormones, or with one of the growth promoting substances, auxin cytokinin, and gibberellin. The derivative melting profiles of the extracted DNA's differ from each other with respect to the size of various AT- and GC- rich fractions. Evidence has been obtained for the increase of the more AT--rich fractions i...

The distribution of polysomes in the cells of the endosperm of very young (48 hours of germination) seedlings of castor bean (Ricinus communis var. Hale) has been examined. Seedlings exposed to 100 micromolar gibberellin A(3) for periods up to 24 hours showed increased numbers of polysomes associated with endomembranes. Cytosol-derived polysomes were generally of a shorter mean length than memb...

Plant genes related to gibberellin biosynthesis and signaling are differentially regulated during the early stages of AM fungal interactions. MOLECULAR PLANT. 5(4) pp: 951-954.