scholarly journals Effect of 2,4-Dichlorophenoxyacetic Acid and 2,4-Dinitrophenol on the Uptake and Metabolism of Exogenous Substrates by Corn Roots.

1959 ◽  
Vol 34 (2) ◽  
pp. 112-116 ◽  
Author(s):  
T. E. Humphreys ◽  
W. M. Dugger
Keyword(s):  
Dichlorophenoxyacetic Acid ◽  
Corn Roots ◽  
2,4 Dichlorophenoxyacetic Acid ◽  
Uptake And Metabolism ◽  
Exogenous Substrates

scholarly journals Uptake and metabolism of 2,4-dichlorophenoxyacetic acid during induction of Norway spruce (Picea abies (L.) Karst.) somatic embryogenesis

2005 ◽  
Vol 53 (5) ◽  
pp. 169-174
Author(s):  
Helena Vlašínová ◽  
Ladislav Havel ◽  
Marek Klemš ◽  
Stanislav Procházka
Keyword(s):  
Somatic Embryogenesis ◽  
Picea Abies ◽  
Norway Spruce ◽  
Zygotic Embryos ◽  
Dichlorophenoxyacetic Acid ◽  
Main Task ◽  
Embryogenic Cultures ◽  
2,4 Dichlorophenoxyacetic Acid ◽  
Uptake And Metabolism

Uptake and metabolism of 2,4-dichlorophenoxyacetic acid (2,4-D) into zygotic embryos of Norway spruce (Picea abies (L.) Karst.) were studied on medium used for induction of somatic embryogenesis. The main task of this work was to study effect of longitudinal bisection of embryos, which was found as increasing the subsequent induction of embryogenic cultures. The maximal uptake of 2,4-D per one embryo was detected after 16 hours on medium in bisected embryos. The bisection increased 2,4-D uptake per embryo in first 16th hours, but then increased its release back to the medium. The metabolism of 2,4-D in bisected embryos was lower than in intact ones during first two days of culture.

THE EFFECTS OF INDOLEACETIC ACID AND 2,4-DICHLOROPHENOXYACETIC ACID ON THE UPTAKE AND METABOLISM OF 14C-GLUCOSE AND ON THE INCORPORATION OF 14C-LABELLED AMINO ACIDS INTO PROTEIN IN PEA ROOT TIPS

1967 ◽  
Vol 45 (9) ◽  
pp. 1751-1760 ◽  
Author(s):  
W. K. Kim ◽  
R. G. S. Bidwell
Keyword(s):  
Amino Acids ◽  
Indoleacetic Acid ◽  
Sugar Metabolism ◽  
Dichlorophenoxyacetic Acid ◽  
Root Tips ◽  
Pea Root ◽  
Main Effect ◽  
2,4 Dichlorophenoxyacetic Acid ◽  
Rates Of Growth ◽  
Uptake And Metabolism

The effect of indoleacetic acid and 2,4-dichlorophenoxyacetic acid on the uptake and metabolism of 14C-labelled glucose and amino acids by excised pea root tips was studied. The intention was to determine whether the observed reduction of root growth by growth hormones was caused by interference in the uptake or in the metabolism of compounds by roots. The results indicate that the main effect of auxins on sugar metabolism in root tips is not on uptake, but on the subsequent metabolism of glucose. Auxins also had several specific rather than general effects on the synthesis of proteins. The production of certain amino acids from glucose was prevented, and the entry of others into protein was affected. This indicates that effects of auxin on protein metabolism were specific, and not necessarily merely consequences of decreased rates of growth and metabolism.

In Vitro Shoot Regeneration from Callus Derived from Marubakaido Apple Rootstock under Different Aluminium Concentrations

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 460e-460 ◽  
Author(s):  
Marisa F. de Oliveira ◽  
Gerson R. de L. Fortes ◽  
João B. da Silva
Keyword(s):  
Shoot Regeneration ◽  
Dichlorophenoxyacetic Acid ◽  
Apple Rootstock ◽  
Under Five ◽  
Significant Difference ◽  
Previously Treated ◽  
2,4 Dichlorophenoxyacetic Acid ◽  
In Vitro Shoot Regeneration

The aim of this work was to evaluate the organogenesis of Marubakaido apple rootstock under different aluminium concentratons. The explants were calli derived from apple internodes treated with either 2,4-dichlorophenoxyacetic acid or pichloram at 0.5 and 1.0 μM and under five different aluminium concentrations (0, 5, 10, 15, 20 mg/L). These calli were then treated with aluminium at 0, 5, 10, 15, and 20 mg/L. It was observed shoot regeneration only for those calli previously treated with pichloram. There were no significant difference among the aluminium concentrations.

Characterization of the Reproductive Mode in Guayule In Vitro

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 483a-483
Author(s):  
Roy N. Keys ◽  
Dennis T. Ray ◽  
David A. Dierig
Keyword(s):  
Field Experiments ◽  
Reproductive Mode ◽  
Dichlorophenoxyacetic Acid ◽  
Initial Field ◽  
Breeding Lines ◽  
Reproductive Modes ◽  
Desert Southwest ◽  
2,4 Dichlorophenoxyacetic Acid

Guayule (Parthenium argentatum Gray, Asteraceae) is a latex-producing perennial desert shrub that is potentially of economic importance as an industrial crop for the desert Southwest. It is known to possess complex reproductive modes. Diploids are predominantly sexual and self-incompatible, while polyploids show a range of apomictic potential and self-compatibility. This paper describes the development of a relatively rapid and simple technique for characterizing reproductive modes of breeding lines of P. argentatum. Initial field experiments were based on an auxin test used successfully to characterize reproductive mode in the Poaceae. The application of 2,4-dichlorophenoxyacetic acid inhibited embryo formation in P. argentatum, but this was not the case with other auxins tested. Results of field experiments were ambiguous because: 1) the floral structure of P. argentatum is such that auxins might not have penetrated to the ovules, and 2) there was potential self-fertilization by pollen released within isolation bags. Therefore, in vitro culture of flower heads was tested because it provided much better control of environmental conditions, growth regulator application, and pollen release. Auxin alone, or in combination with gibberellic acid or kinetin, inhibited parthenogenesis in vitro. Embryo production did not vary using two substantially different nutrient media. In vitro flower head culture using a (Nitsch and Nitsch) liquid nutrient medium without growth regulators, enabled characterization of the reproductive mode of seven breeding lines, ranging from predominantly sexual to predominantly apomictic. The results of this technique were substantiated using RAPD analyzes of progeny arrays from controlled crosses.

The role of a metabolic intermediate in the biodegradation of inhibitory substrates

1997 ◽  
Vol 36 (10) ◽  
pp. 27-36 ◽  
Author(s):  
P. Mungkarndee ◽  
S. M. Rao Bhamidimarri ◽  
A. J. Mawson ◽  
R. Chong
Keyword(s):  
The Other ◽  
Metabolic Product ◽  
Dichlorophenoxyacetic Acid ◽  
Mutual Inhibition ◽  
Metabolic Intermediate ◽  
Batch Cultures ◽  
Ortho Cresol ◽  
2,4 Dichlorophenoxyacetic Acid

Biodegradation of the mixed inhibitory substrates, 2,4-dichlorophenoxyacetic acid (2,4-D) and para-chloro-ortho-cresol (PCOC) was studied in aerobic batch cultures. Each substrate added beyond certain concentrations inhibited the degradation of the other. This mutual inhibition was found to be enhanced by 2,4-dichlorophenol (2,4-DCP) which is an intermediate metabolic product of 2,4-D. When 2,4-DCP accumulated to approximatelY 40 mg/l degradation of all compounds in the mixed 2,4-D and PCOC substrate system was completely inhibited. The degradation of 2,4-D and PCOC individually was also found to be inhibited by elevated concentrations of 2,4-DCP added externally, while PCOC inhibited the utilization of the intermediate.

2,4-dichlorophenoxyacetic acid through lactation induces astrogliosis in rat brain

1997 ◽  
Vol 30 (3) ◽  
pp. 175-185 ◽  
Author(s):  
A. Brusco ◽  
J. Pecci Saavedra ◽  
G. García ◽  
P. Tagliaferro ◽  
A. M. Evangelista de Duffard ◽  
...  
Keyword(s):  
Rat Brain ◽  
Dichlorophenoxyacetic Acid ◽  
2,4 Dichlorophenoxyacetic Acid
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