The present study was carried out to investigate laboratory germination responses of six collections of Garcinia kola seeds to six different hormonal pre-germination treatments. This consisted of soaking seeds for three days in cool distilled water (control), in cool distilled water supplemented with 10 M of either naphthaleneacetic acid (NAA), 2,4-dichlorophenoxyacetic acid (2,4-D), benzylamin...

Here, efficient plantlet regeneration via somatic embryogenesis from Panax quinquefolium hairy roots was reported. Callus development was optimal on MS medium containing 2,4-dichlorophenoxyacetic acid (1 mg l) and -naphthalene acetic acid (1 mg l). After a 4-week growth, calli were transferred onto MS medium with different combinations of plant growth regulators (PGRs). The highest embryogenesi...

exogenous indoleacetic acid in plant tissues. Plant Physiol. 31: 231-235. 1956. 7. JAWORSKI, E. G. and BuTTs, J. S. Studies in plant metabolism. II. The metabolism of C14-labeled 2,4-dichlorophenoxyacetic acid in bean plants. Arch. Biochem. Biophys. 38: 207-218. 1952. 8. LEOPOLD, A. C. and GUERNSEY, F. S. A theory of auxin action involving coenzyme A. Proc. Natl. Acad. Sci., U.S. 39: 1105-1111....

Abbreviations: 2,4-D: 2,4-dichlorophenoxyacetic acid ABA: abscisic acid ABI3: ABI gene family member 3 ANP1: Arabidopsis NPK1-like protein kinase AP: ascorbate peroxidase AOX: alternative oxidase DNA: deoxyribonucleic acid Fe-EDTA: ferric ethylenediaminetetraacetic acid M: molar concentration MAPK: mitogen-activated protein kinase NO: Nitric oxide PGRs: plant growth regulators ROS: reactive oxy...

Three 2,4-dichlorophenoxyacetic acid (2,4-D) -resistant root callus tissue lines of Glycine max L. Merrill var. Acme were derived by culturing callus tissue 2 to 6 months on 40 milligrams per liter 2,4-D and designated 40R, 40B, and 40C. Tissue line 40R had a lower level of 2,4-D uptake in 2-week-old tissue which disappeared in 3.5-week-old tissue and less free 2,4-D following incubation for 24...

taxus    is an endangered plant which is the only commercial source of paclitaxel, which is used for treatment of ovary and breast cancer. as production of this valuable drug is a destructive process, other alternatives should be considered for its sustainable production. plant tissue and cell culture is a promising method for production of secondary metabolites. in order to optimize yew callus...

During a study of the effect of 2,4-dichlorophenoxyacetic acid on the soluble nucleotides in soybean seedlings (1)) a nonnucleotide compound accumulated in the treated seedlings. The same compound was found in high concentrations in immature soybean seeds that would not germinate (2). The compound inhibited seed germination and markedly affected respiration and phosphorylation of both intact so...

This study provides a physiological analysis of somatic embryogenesis in four elite cultivars of date palms: Ahmar, Amsekhsi, Tijib, and Amaside, from the initial callogenesis to establishment and proliferation of embryogenic suspension cultures. Somatic embryos development and in vitro plants rooting were also studied. For each step, auxins and cytokinins concentrations were optimised. The pri...

glucose-l-l4C and glucose-6-l4C. Plant Physiol. 40: 748-751. 2. Barbour, R. D., D. R. Buhler, and C. H. Wang. 1958. Identification and estimation of catabolic pathways of glu cose in fruits. Plant Physiol. 33: 396-400. 3. Black, C. C, and T. E. Humphreys. 1962. Effects of 2,4-dichlorophenoxyacetic acid on enzymes of glycolysis and pentose, phosphate cycle. Plant Physiol. 37: 66-73. 4. Bray, G. ...

2,4-dichlorophenoxyacetic acid and monosodium methanearsonate are often sold in commercial herbicide mixtures. Toxicity studies have been performed for each herbicide individually, but there is a dearth of information concerning the toxicity of these herbicides in a mixture. The following study examined the toxicity of a mixture of these two herbicides in the red swamp crawfish, Procambarus cla...