scholarly journals Influence of lead on auxin-induced cell elongation

2014 ◽  
Vol 52 (3-4) ◽  
pp. 231-239 ◽  
Author(s):  
Marek Burzyński ◽  
Małgorzata Jakób
Keyword(s):  
Acetic Acid ◽  
Cell Elongation ◽  
Cell Walls ◽  
Inhibitory Action ◽  
Tissue Growth ◽  
Lead Chloride ◽  
Wheat Coleoptile ◽  
Green Pea ◽  
Pea Epicotyl ◽  
Hypocotyl Segments

The influence of lead chloride on plant tissue growth is described. Lead reduced elongation of etiolated wheat coleoptile segments, green pea epicotyl fragments and etiolated and green sunflower hypocotyls. Green tissues were more susceptible to lead than etiolated ones. PbCl<sub>2</sub> in a 10<sup>-4</sup> M concentration significantly reduced plastic and elastic extensibility of the wheat coleoptile cell walls and diminished the hydration of sunflower hypocotyl segments. Auxin (indolyl-3-acetic acid - IAA) applied in concentration optimal for growth of the particular tissues partly attenuated the inhibitory action of lead on elongation, plastic and elastic extensibility and water absorption. Auxin applied in supraoptimal concentrations did not abolish the inhibitory action of lead on tissue growth.

Ectodesmata as Revealed By Freeze-Etch Preparations of Plant Epidermal Cell Walls

1973 ◽  
Vol 31 ◽  
pp. 468-469
Author(s):  
N.C. Lyon ◽  
W. C. Mueller
Keyword(s):  
Electron Microscopy ◽  
Acetic Acid ◽  
Nitric Acid ◽  
Oxalic Acid ◽  
Light Microscopy ◽  
Epidermal Cell ◽  
Cell Walls ◽  
Plant Viruses ◽  
Plant Leaves ◽  
Thin Sections

Schumacher and Halbsguth first demonstrated ectodesmata as pores or channels in the epidermal cell walls in haustoria of Cuscuta odorata L. by light microscopy in tissues fixed in a sublimate fixative (30% ethyl alcohol, 30 ml:glacial acetic acid, 10 ml: 65% nitric acid, 1 ml: 40% formaldehyde, 5 ml: oxalic acid, 2 g: mecuric chloride to saturation 2-3 g). Other workers have published electron micrographs of structures transversing the outer epidermal cell in thin sections of plant leaves that have been interpreted as ectodesmata. Such structures are evident following treatment with Hg++ or Ag+ salts and are only rarely observed by electron microscopy. If ectodesmata exist without such treatment, and are not artefacts, they would afford natural pathways of entry for applied foliar solutions and plant viruses.

Application of a Resin Casting Method to Wood Anatomy of Some Japanese Fagaceae Species

IAWA Journal ◽  
1993 ◽  
Vol 14 (3) ◽  
pp. 273-288 ◽  
Author(s):  
Tomoyuki Fujii
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Electron Microscope ◽  
Cell Walls ◽  
Wood Anatomy ◽  
Acetic Acid Solution ◽  
Casting Method ◽  
Japanese Species ◽  
Dry Wood ◽  
Scanning Electron

A resin casting method was applied to the wood anatomy of some Japanese species of Fagaceae. Dry wood blocks were embedded in polystyrene and then cell walls were completely removed by alternate and repeated treatments with hydrogen peroxide/acetic acid solution and sulphuric acid. Resin casts were observed in a scanning electron microscope.

Anti-inflammatory Effects of Mao-Bushi-Saishin-to in Mice and Rats

1998 ◽  
Vol 26 (02) ◽  
pp. 171-179 ◽  
Author(s):  
Yoshiki Ikeda ◽  
Osamu T. Iijima ◽  
Akira lizuka ◽  
Atsushi Ishige ◽  
Sakae Amagaya ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Arachidonic Acid ◽  
Mast Cells ◽  
Phorbol Ester ◽  
Underlying Mechanism ◽  
Tissue Growth ◽  
Cotton Pellet ◽  
Hind Foot ◽  
Anti Inflammatory ◽  
Permeability Increase

Effects of Mao-Bushi-Saishin-to (MBS) on anti-inflammatory activities were examined in mice and rats. MBS significantly inhibited the increase in vascular permeability induced by acetic acid, the ear edema induced by arachidonic acid and phorbol ester, and the cutaneous extravasation induced by bradykinin and histamine. MBS, however, was not effective against the serotonin-induced cutaneous permeability increase in mice. MBS significantly inhibited carrageenin-induced hind foot edema and cotton pellet-induced granulation tissue growth in rats. These results show that MBS may exert anti-inflammatory effects through the underlying mechanism(s) of preventing mediator release from mast cells and macrophages.

Induction of ethylene formation in bean (Phaseolus vulgaris) hypocotyl segments by preparations isolated from germ tube cell walls of Uromyces phaseoli

Planta ◽  
1979 ◽  
Vol 146 (2) ◽  
pp. 193-197 ◽  
Author(s):  
Inge Paradies ◽  
B. H�mme ◽  
H. H. Hoppe ◽  
R. Heitefuss ◽  
E. F. Elstner
Keyword(s):  
Phaseolus Vulgaris ◽  
Cell Walls ◽  
Germ Tube ◽  
Ethylene Formation ◽  
Tube Cell ◽  
Uromyces Phaseoli ◽  
Hypocotyl Segments

scholarly journals Resin acids as the potential growth-affecting component of pine oleoresin

2015 ◽  
Vol 40 (4) ◽  
pp. 539-548 ◽  
Author(s):  
T. J. Wodzicki ◽  
Alina B. Grodek ◽  
S. Zajączkowska
Keyword(s):  
Aspergillus Niger ◽  
Inhibitory Effect ◽  
Tissue Growth ◽  
Resin Acids ◽  
Wheat Coleoptile ◽  
High Concentration ◽  
Potential Growth ◽  
Microbiological Test ◽  
Growth Test ◽  
Coleoptile Section

The nonvolatile fraction of the oleoresin of <i>Pinus sihestris</i> L. was found to contain substances which inhibit growth of wheat ceoleoptile and oat mesocotyl sections in standard bioassays. The inhibition is mainly confined to the fraction of resin acids. Among the seven authentic resin acids tested, the effects of dehydroabietic and abietic acids were most sifgnificant. Palustric, pimaric and isopimaric acids were not effective in the wheat coleoptile section straight growth test. None of the substances, in the amounts tested, except for extremely high concentration, exerted an inhibitory effect on natural or IAA-induced elongation of pine hypocotyl sections. Neither was an inhibitory effect discovered in the microbiological test with the <i>Aspergillus niger</i> van Tiegh. The results obtained with pine hypocotyl sections, allow the conclusion that resin acids interfering with the results of standard bioassays are probably not effective as inhibitory factors in the regulation of pine tissue growth.

Promotion of plant growth and inhibition of enzymic degradation of indole-3-acetic acid by metabolites of carbofuran, a carbamate insecticide

1977 ◽  
Vol 55 (5) ◽  
pp. 574-579 ◽  
Author(s):  
T. T. Lee
Keyword(s):  
Acetic Acid ◽  
Plant Growth ◽  
Inhibitory Action ◽  
Critical Level ◽  
Growth Promotion ◽  
Stem Segment ◽  
Stem Tissue ◽  
Carbamate Insecticide ◽  
Promote Plant Growth ◽  
Indole 3 Acetic Acid

The carbamate insecticide carbofuran (2,2-dimethyl-2,3-dihydrobenzofuranyl-7-N-methyl carbamate) and three of its metabolites (7-hydroxy-2,2-dimethyl-2,3-dihydrobenzofuran (III), 3,7-dihydroxy-2,2-dimethyl-2,3-dihydrobenzofuran (IV), and 3-keto-7-hydroxy-2,2-dimethyl-2,3-dihydrobenzofuran (V)) stimulated growth in the pea stem segment assay in the presence, but not absence, of a low concentration of indole-3-acetic acid (IAA). The metabolites were more active than carbofuran itself. The synergistic effect on growth was specific with IAA since it was not observed in the presence of other auxins.Metabolites III, IV, and V and, to a lesser degree, carbofuran were found to be inhibitory to IAA degradation catalyzed by pea stem tissue or purified horseradish peroxidase (EC 1.11.1.7). Comparison of the relative activities of the compounds in the inhibition of IAA degradation and in the promotion of plant growth suggests a causal relationship. The implication is that carbofuran may promote plant growth through the inhibitory action of its metabolites on enzymic breakdown of IAA, thus preserving a critical level of IAA required for growth promotion.

Sign in / Sign up

Export Citation Format

Share Document