scholarly journals Influence of Dimepiperate on Auxin Activity of Clomeprop in Maize Coleoptile Section.

1993 ◽  
Vol 38 (2) ◽  
pp. 112-114
Author(s):  
Do-Jin Lee ◽  
Kenji Usui ◽  
Kozo Ishizuka
Keyword(s):  
Auxin Activity ◽  
Maize Coleoptile ◽  
Coleoptile Section

scholarly journals Phytochrome Control of Maize Coleoptile Section Elongation

1981 ◽  
Vol 67 (2) ◽  
pp. 355-357 ◽  
Author(s):  
Timothy J. Warner ◽  
James D. Ross ◽  
James Coombs
Keyword(s):  
Maize Coleoptile ◽  
Coleoptile Section

scholarly journals Fusicoccin (FC)-Induced Rapid Growth, Proton Extrusion and Membrane Potential Changes in Maize (Zea mays L.) Coleoptile Cells: Comparison to Auxin Responses

2021 ◽  
Vol 22 (9) ◽  
pp. 5017
Author(s):  
Małgorzata Polak ◽  
Waldemar Karcz
Keyword(s):  
Membrane Potential ◽  
Rapid Growth ◽  
Proton Pumps ◽  
Proton Extrusion ◽  
Membrane Hyperpolarization ◽  
Fungal Toxin ◽  
Maize Coleoptile ◽  
Lag Times ◽  
Kinetics Of ◽  
Indole 3 Acetic Acid

The fungal toxin fusicoccin (FC) induces rapid cell elongation, proton extrusion and plasma membrane hyperpolarization in maize coleoptile cells. Here, these three parameters were simultaneously measured using non-abraded and non-peeled segments with the incubation medium having access to their lumen. The dose–response curve for the FC-induced growth was sigmoidal shaped with the maximum at 10−6 M over 10 h. The amplitudes of the rapid growth and proton extrusion were significantly higher for FC than those for indole-3-acetic acid (IAA). The differences between the membrane potential changes that were observed in the presence of FC and IAA relate to the permanent membrane hyperpolarization for FC and transient hyperpolarization for IAA. It was also found that the lag times of the rapid growth, proton extrusion and membrane hyperpolarization were shorter for FC compared to IAA. At 30 °C, the biphasic kinetics of the IAA-induced growth rate could be changed into a monophasic (parabolic) one, which is characteristic for FC-induced rapid growth. It has been suggested that the rates of the initial phase of the FC- and IAA-induced growth involve two common mechanisms that consist of the proton pumps and potassium channels whose contribution to the action of both effectors on the rapid growth is different.

Impermeant auxin analogues have auxin activity

Planta ◽  
1990 ◽  
Vol 182 (2) ◽  
Author(s):  
MichaelA. Venis ◽  
EmrysW. Thomas ◽  
H�l�ne Barbier-Brygoo ◽  
Genevi�ve Ephritikhine ◽  
Jean Guern
Keyword(s):  
Auxin Activity

scholarly journals Identification of IAA Transport Inhibitors Including Compounds Affecting Cellular PIN Trafficking by Two Chemical Screening Approaches Using Maize Coleoptile Systems

2012 ◽  
Vol 53 (10) ◽  
pp. 1671-1682 ◽  
Author(s):  
Takeshi Nishimura ◽  
Naoyuki Matano ◽  
Taichi Morishima ◽  
Chieko Kakinuma ◽  
Ken-ichiro Hayashi ◽  
...  
Keyword(s):  
Chemical Screening ◽  
Maize Coleoptile ◽  
Transport Inhibitors ◽  
Screening Approaches

Xanthoxin, a recently discovered plant growth inhibitor

1972 ◽  
Vol 180 (1060) ◽  
pp. 317-346 ◽  
Keyword(s):  
Plant Growth ◽  
Growth Inhibitor ◽  
Wheat Coleoptile ◽  
Spectroscopic Techniques ◽  
Plant Growth Inhibitor ◽  
Coleoptile Section ◽  
Cress Seed ◽  
Aba Content ◽  
Seed Germination Test

The naturally occurring plant growth inhibitor xanthoxin which was discovered in these laboratories has been prepared in vitro by the oxidation of the pigment violaxanthin with neutral zinc permanganate solution. By the use of chemical and spectroscopic techniques, xanthoxin has been characterized as a mixture of the 2- cis , 4- trans - and 2- trans , 4- trans -isomers of 5-(1', 2', -epoxy-4'-hydroxy-2', 6', 6'-tri-methyl-1'-cyclohexy)-3-methyl-pentadienal. These are also obtained by similar oxidations of neoxanthin, antheraxanthin and lutein epoxide. Cis, trans -xanthoxin probably arises from the corresponding cis -xanthophyll and its conversion to ( + )-ABA by simple chemical procedures is reported. The biological activity of cis, trans -xanthoxin has been shown to be considerably greater than that of the trans, trans -isomer. It is comparable with that of ( ± )-ABA in the wheat coleoptile section, the lettuce hypocotyl and bean petiole abscission tests, but greater than that of ( ± )-ABA in the cress seed germination test. Xanthoxin is shown to antagonize the growth-promoting effects of the plant hormones 3-indolylacetic acid, gibberellic acid and kinetin. Other xanthoxin derivatives have been prepared and their activities in several tests are also reported. The uptake of xanthoxin by tomato shoots leads to a subsequent large increase in the ABA content of the tissue. Evidence is presented for a possible biogenetic conversion of cis, trans -xanthoxin into ( + )-ABA by plants.

scholarly journals Allelopathy and Auxin-activity

1947 ◽  
Vol 23 (1-11) ◽  
pp. 53-55 ◽  
Author(s):  
Toshio YAMAKI
Keyword(s):  
Auxin Activity

scholarly journals Comparison of auxin activty in tumourous and normal callus cultures from sunflower and tobacco plants

2015 ◽  
Vol 48 (1) ◽  
pp. 47-53 ◽  
Author(s):  
Z. Chirek
Keyword(s):  
Genetic Regulation ◽  
Callus Cultures ◽  
The Other ◽  
Hormone Metabolism ◽  
Tobacco Plants ◽  
Auxin Level ◽  
Avena Coleoptile ◽  
Auxin Activity ◽  
Normal Tissues ◽  
Different Types

In normal and tumourous calluses of sunflower and tobacco the level of extractable auxins was determined by <i>Avena coleoptile</i> straight growth test. Auxin activity was detected practically in two zones: I - at position with R<sub>f</sub> 0.2-0.4 and II - at position with R<sub>f</sub> 0.6-0.9. The tumour tissues of sunflower and tobacco plants, representing different types of neoplastic growth exhibit a 3 times higher auxin activity as compared with that of the corresponding normal tissues. Tobacco tissues, on the other hand, had a higher auxin level than the corresponding sunflower tissues and they exhibited different proportions in the activity of zones I and II, which points to a dominance of genetic regulation of hormone metabolism in these plants.

Does 3-Methyleneoxindole Possess Auxin Activity?

1974 ◽  
Vol 25 (4) ◽  
pp. 761-763 ◽  
Author(s):  
LORIN W. ROBERTS
Keyword(s):  
Auxin Activity
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