Activity of some 6-(substituted) purines on the development of the moss Tortella caespitosa

Quantitative Relationship between Various Growth Substances and Bud Production in Funaria hygrometrica. A bioassay for abscisic acid

“…The cultures treated with the aminopurines showed no abnormalities as was observed by Gorton et al (1957) on Jortella caespitosa. All the cultures eventually produce buds and in the case of the controls about 7 days after the cytokinin treated ones.…”

Kinetin & Kinetin Analogues as Substrates & Inhibitors of Xanthine Oxidase

“…The data presented offer additional evidence for the unusually low order of specificity of xanthine oxidase towards purine substrates and inhibitors in vitro, a situation similar to the lack of specificity of substituted purines in kinetin-sensitive systems in vivo (4,5,7,8,9,11,12). In the latter systems the alkylaminopurines generally have been found to elicit a maximum response at appreciably lower concentrations than the dialkylamino-, alkylthio-, or alkyloxypurine derivatives having the same number of carbon atoms in the hydrocarbon residues, and the homologues observed to be most effective at the lowest concentrations in many systems are the n-butyl-to n-hexyl-aminopurines.…”

“…The discovery of the stimulation of cell division in plant tissues by trace amounts of kinetin, 6-(2-furfuryl) aminopurine (11), has resulted in a number of investigations concerned with the effects of this and related compounds on a variety of plant and animal systems (4,5,7,9,10,12,13). One system, developed for study of the in situ effect of agents upon the maintenance of normal organization of cells in differentiated tissues, uses exposed tissues of planaria, a primitive invertebrate (7).…”

Cytokinins from the Moss Physcomitrella patens

“…One of the latter stages in moss morphogenesis is the production of leafy shoots or gametophores which eventually give rise sexually to the sporophyte generation and the production of spores. The production of gametophores can be influenced by plant growth regulator application; it is this influence that has led to the hypothesis that the naturally occurring compounds may be involved in gametophore development in vivo (12,13). Consequently, moss tissue has been used for many biochemical and physiological studies of plant hormones (6,7,11,17,20), even though the presence of these substances in normal moss tissue has yet to be established.…”