Six dichloro-, 3 trichloro-, 2 triiodo-, and 3 heterosubstituted benzoic acids (amiben, dinoben, dicamba), and N-1-naphthylphthalamic acid have been tested for effects on growth and on polar auxin transport. Growth activity with and without kinetin was measured by effects on fresh and dry weights of 30-day cultures of fresh tobacco pith. Transport inhibition was measured by following uptake and...

Edstrom's microphoresis technique has been employed to determine the quantitative alterations in nucleic acid content and base composition of individual cells associated with the initiation of bud primordia in Funaria hygrometrica. The filamentous protonema of this moss initiates bud cells which through repeated divisions form the leafy gametophores. The cytokinin, 6-furfurylaminopurine (kineti...

Biological activity of the type exhibited by kinetin (I) in promoting growth (cell division, organ formation, etc.) in plant tissues has been found to be limited almost entirely to 6-substituted purine derivatives.", 2 Activity has been reported for a few other substances including a 3-substituted adenine derivative, the alkaloid triacanthine,3 isolated from honey locust leaves and identified b...

The interaction effects of kinetin and flooding on growth indexes, chlorophyll content, and the activity of 5-aminolevulinic acid dehydratase (ALA-D; EC 4.2.1.24) in seedlings of corn (Zea mays L. cv. 704) were investigated. Samples were taken 48, 96, 144, and 192 h after the start of treatment. Growth criteria (root length, shoot height, and dry weight) were inhibited more in flooded plants th...

PAL (EC 4.3.1.5) plays a key role in linking primary metabolism to phenylpropanoid metabolism by catalyzing the deamination of L-Phe to produce trans-cinnamic acid. This reaction is considered a key step in phenylpropanoid metabolism. In bean (Edwards et al., 1985) and parsley (Lois et al., 1989), PAL genes are transcriptionally activated by elicitor treatment, UV light, and wounding. We report...