scholarly journals Studies on the After Effects of Some Synthetic Growth Substances in the Treatment of Seeds : I : (1) Favorable Effects of β-indoleacetic Acid (K-salt) upon Growth and Yield of Soybeans

1942 ◽  
Vol 14 (2) ◽  
pp. 165-170
Author(s):  
Sin-itiro KAWATA
Keyword(s):  
Indoleacetic Acid ◽  
Growth And Yield ◽  
Growth Substances ◽  
After Effects ◽  
Synthetic Growth

A Comparison of Synthetic Growth Regulators with Indoleacetic Acid, with Respect to Methionine Metabolism

Weeds ◽  
1965 ◽  
Vol 13 (3) ◽  
pp. 280 ◽  
Author(s):  
Jay D. Mann ◽  
Lowell S. Jordan ◽  
Boysie E. Day
Keyword(s):  
Growth Regulators ◽  
Indoleacetic Acid ◽  
Methionine Metabolism ◽  
Synthetic Growth

scholarly journals The differential effect of synthetic growth substances and other compounds upon plant species II. Seed germination and early growth responses to some arylcarbamic esters and related compounds

1946 ◽  
Vol 133 (873) ◽  
pp. 480-485 ◽  
Keyword(s):  
Seed Germination ◽  
Differential Effect ◽  
Marked Effect ◽  
Early Growth ◽  
Growth Substances ◽  
Growth Responses ◽  
Low Concentrations ◽  
Dicotyledonous Plants ◽  
Related Compounds ◽  
Synthetic Growth

The preparation and biological examination of a number of arylcarbamic esters (arylurethanes) are described. The experiments demonstrate the marked effect of iso propyl phenylcarbamate and some related compounds in very low concentrations upon the germination and seedling growth of cereals. The absence of effect of the same compounds in similar concentrations upon some dicotyledonous plants is noted.

The control of sucker growth in tobacco by growth substances and mineral oils.

1953 ◽  
Vol 4 (4) ◽  
pp. 390
Author(s):  
J Calvert
Keyword(s):  
Growth Regulator ◽  
Indoleacetic Acid ◽  
Maleic Hydrazide ◽  
Growth Substances ◽  
Mineral Oils ◽  
Highly Effective

Indoleacetic acid ranging in concentration from 50 to 10,000 p.p.m. significantly reduced the growth of suckers on plants which had had the apical leaves and inflorescence excised. Five mineral oils significantly reduced the suckering in tobacco grown in the glass-house. Twelve mineral oils tested in north Queensland under conditions similar to commercial growing were all highly effective in reducing sucker growth. As the concentration of indoleacetic acid increased, the epinastic effect on the leaves became more pronounced. The mineral oils did not produce epinasty. No pathological reactions were observed with any of the treatments. Maleic hydrazide was the only growth regulator used in the field that significantly reduced sucker growth.

scholarly journals Bacterial and Yeast Endophytes from Poplar and Willow Promote Growth in Crop Plants and Grasses

ISRN Agronomy ◽  
2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Zareen Khan ◽  
Grant Guelich ◽  
Ha Phan ◽  
Regina Redman ◽  
Sharon Doty
Keyword(s):  
Nitrogen Fixation ◽  
Plant Growth ◽  
Indoleacetic Acid ◽  
Growth Hormones ◽  
Growth And Yield ◽  
Environmental Costs ◽  
Agricultural Systems ◽  
Chemical Fertilizers ◽  
Commercially Important ◽  
Sustainable Agricultural Systems

Endophytic associations with plants have a beneficial effect for many different plant species with some of them being host specific. Several endophytes isolated from poplar and willow were screened for their effects on commercially important crops including corn, tomato, pepper, squash, sunflower, and grasses. Most of these endophytes produce growth hormones such as indoleacetic acid (IAA) and have the nitrogenase gene required for nitrogen fixation. The effects of these isolates on plant growth and yield were evaluated under greenhouse conditions. We found that inoculated plants not only had better viability and earlier flowering and fruiting, they also had increased plant growth and fruit yields when grown in nitrogen-limited soil. In a particular variety of perennial rye grass, the endophytes increased the total nitrogen content of the plants, indicative of nitrogen fixation, in addition to promoting plant growth. The use of specific endophytes may be preferable to the use of chemical fertilizers because of the monetary and environmental costs, contributing to more sustainable agricultural systems.

THE PHYSIOLOGY OF HOST–PARASITE RELATIONS: V. A PRELIMINARY EXAMINATION OF THE LEVEL OF FREE ENDOGENOUS INDOLEACETIC ACID IN RUSTED AND MILDEWED CEREAL LEAVES AND THEIR ABILITY TO DECARBOXYLATE EXOGENOUSLY SUPPLIED RADIOACTIVE INDOLEACETIC ACID

1958 ◽  
Vol 36 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Michael Shaw ◽  
A. R. Hawkins
Keyword(s):  
Oxidase Activity ◽  
Indoleacetic Acid ◽  
Sharp Decrease ◽  
Inhibiting Activity ◽  
Growth Substances ◽  
Fresh Weight ◽  
Avena Coleoptile ◽  
Preliminary Examination ◽  
Growth Promoting ◽  
Host Parasite

The growth substances were extracted with cold alcohol from the first leaves of uninfected, rusted (wheat), and mildewed (barley) cereal seedlings. The acid ether fractions were chromatographed on paper and the chromatograms were cut into sections which were assayed for growth promoting or inhibiting activity in the Avena coleoptile straight growth test. The estimated, free, endogenous indoleacetic acid content of uninfected leaves ranged from 0.5 to 3.2 μg. per kilogram fresh weight. In the early stages of infection this decreased, but increased again to from 5 to about 10 μg. per kilogram fresh weight by the 10th day after the inoculation of susceptible hosts. Indoleacetic acid was not detected in ungerminated uredospores of stem rust (race 15B), but two other growth promoting substances appeared to be present.Leaf disks were incubated with radioactive indoleacetic acid (as —C14OOK) and the radioactivity released as C14O2 was measured. The ability of the tissue to decarboxylate the indoleacetate (‘oxidase’ activity) increased sharply, sometimes to as much as 1000%, in the first 3 days after inoculation. With susceptible hosts, this increase was followed by an almost equally sharp decrease to less than 50% of the values for uninfected tissue. With infected, resistant tissue, the secondary decrease in ‘oxidase’ activity was delayed and less pronounced.The results are discussed and a working hypothesis suggested with respect to the relation between susceptibility or resistance and the auxin balance.

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