Review lecture Some developments in research on plant growth inhibitors

1975 ◽  
Vol 191 (1104) ◽  
pp. 335-352 ◽  
Keyword(s):  
Growth Hormone ◽  
Plant Growth ◽  
Agricultural Research ◽  
Physiological Stress ◽  
Hormonal Control ◽  
Agricultural Research Council ◽  
Naturally Occurring ◽  
Potent Growth ◽  
Plant Growth Inhibitors ◽  
Synthetic Growth

A brief account is given of recent research on abscisic acid and the protection which is conferred by this naturally occurring growth hormone inhibitor to plants when they are exposed to various types of physiological stress is discussed. The discovery in the Agricultural Research Council Unit at Wye College of another potent growth hormone inhibitor, which is produced when certain xanthophyll epoxides, e. g. violaxanthin, are exposed to light is described. This inhibitor has been characterized as 2- cis ,4- trans -5- ( 1', 2'-epoxy- 4'-hydroxy- 2',6',6'-trimethyl-1'-cyclohexyl)-3-methylpentadienal and has been named xanthoxin. Its possible role as one of the complex chemicals which operate in the hormonal control of plant growth is discussed. A number of synthetic growth retardants and recent work on their mode of action is reviewed.

scholarly journals IMPACT OF PLANT GROWTH INHIBITORS ON THE GROWTH AND YIELD OF SORGHUM

2021 ◽  
Vol 52 (6) ◽  
pp. 1431-1440
Author(s):  
N. M. Abood ◽  
E. M. SHALAL ◽  
M. I. HAMDAN
Keyword(s):  
Plant Growth ◽  
Dry Matter ◽  
Agricultural Research ◽  
Block Design ◽  
Growth And Yield ◽  
Control Treatment ◽  
Research Station ◽  
Dry Matter Yield ◽  
Growth Inhibitors ◽  
Plant Growth Inhibitors

Field experiment was carried out during the spring and fall seasons of 2019 at the Abu Ghraib Research Station of the Agricultural Research Office/ Ministry of Agriculture, was aimed to investigate the effect of plant growth inhibitors on growth and yield of several sorghum varieties .Randomized Complete Block Design within split plot arrangement with three replications was used. The main plot consists of three growth inhibitors (Cycocel, Ethiphon, and Mebiquat), which were added at stages six and eight leaf stage, in addition to the control treatment (distilled water only), the sub plot was included three cultivars (Mabrouk, Buhooth 70 and Giza 113). The results showed in both seasons significant interaction between cultivars and growth inhibitors in most of the studied traits. The plants of the variety Giza 113 sprayed with Ethiphon recorded the lowest period of reaching physiological maturity, the highest average dry matter yield, and the highest weight of 1000 grains (89.00 days, 17.32 ton ha-1, and 39.33 gm) respectively. The same variety recorded the highest content of chlorophyll in the leaves and the highest grain yield due to the effect of Mebiquat (49.50 spad, 3.93 ton ha-1. The cultivar Buhooth 70 with the effect of Cycocel achieved the highest average of dry matter yield of 33.27 ton ha-1.

3-Indolylacetonitrile: A Naturally Occurring Plant Growth Hormone

Nature ◽  
1952 ◽  
Vol 169 (4299) ◽  
pp. 485-487 ◽  
Author(s):  
E. R. H. JONES ◽  
H. B. HENBEST ◽  
G. F. SMITH ◽  
JOYCE A. BENTLEY
Keyword(s):  
Growth Hormone ◽  
Plant Growth ◽  
Plant Growth Hormone ◽  
Naturally Occurring

Isolation and identification of plant growth-promoting bacteria associated with tall fescue

2009 ◽  
pp. 211-216 ◽  
Author(s):  
J. Monk ◽  
E. Gerard ◽  
S. Young ◽  
K. Widdup ◽  
M. O'Callaghan
Keyword(s):  
New Zealand ◽  
Plant Growth ◽  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Plant Growth Promoting Bacteria ◽  
Beneficial Bacteria ◽  
Isolation And Identification ◽  
Naturally Occurring ◽  
Plant Growth Promoting ◽  
Growth Promoting

Tall fescue (Festuca arundinacea) is a useful alternative to ryegrass in New Zealand pasture but it is slow to establish. Naturally occurring beneficial bacteria in the rhizosphere can improve plant growth and health through a variety of direct and indirect mechanisms. Keywords: rhizosphere, endorhiza, auxin, siderophore, P-solubilisation

THE HORMONAL CONTROL OF RIBONUCLEASE ACTIVITY IN THE LYMPHATIC TISSUE OF MICE

1973 ◽  
Vol 74 (1) ◽  
pp. 201-208 ◽  
Author(s):  
D. Maor ◽  
E. Eylan ◽  
P. Alexander
Keyword(s):  
Growth Hormone ◽  
Lymph Nodes ◽  
Hormonal Control ◽  
Ribonuclease Activity ◽  
Lymphatic Tissue

ABSTRACT Ribonuclease activity in thymus and lymph nodes is stimulated by cortisone; insulin increases ribonuclease activity only in the thymus. Growth hormone and theophylline do not cause changes in thymus and lymph nodes ribonuclease levels. Injections of cortisone combined with growth hormone or with theophylline increase the activity more than cortisone alone. Insulin does not enhance the action of cortisone on ribonuclease activity. A synergistic loss in weight of thymus and spleen was found after administration of cortisone in combination with either growth hormone or with theophylline.

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