scholarly journals Inhibition by Plant Growth Retardants of Cholesterol Biosynthesis in Slices of Rat Liver and Hepatoma

1971 ◽  
Vol 24 (4) ◽  
pp. 1125 ◽  
Author(s):  
L Paleg ◽  
JR Sabine
Keyword(s):  
Plant Growth ◽  
Cholesterol Synthesis ◽  
Cholesterol Biosynthesis ◽  
Normal Liver ◽  
Acid Synthesis ◽  
Growth Retardant ◽  
Growth Retardants ◽  
Host Liver ◽  
Plant Growth Retardants ◽  
Amo 1618

The plant growth retardant Phosfon inhibits cholesterol formation by cell�free preparations of normal liver and the Morris hepatomas 5123C, 7794A, and 9618A. In addition, both Phosfon and Amo 1618 arc active in inhibiting cholesterol synthesis from acetate and mevalonate in slices of host liver and the hepatomas. Fatty acid synthesis from acetate was also reduced in the presence of the retardants.

scholarly journals Sites of Action of Plant Growth Retardants on Cholesterol Biosynthesis by Cell-Free Rat Liver .Preparations

1970 ◽  
Vol 23 (5) ◽  
pp. 1115 ◽  
Author(s):  
LG Paleg
Keyword(s):  
Plant Growth ◽  
Rat Liver ◽  
Cholesterol Biosynthesis ◽  
Growth Retardants ◽  
One Step ◽  
Plant Growth Retardants ◽  
Sites Of Action ◽  
Amo 1618

Experiments with cell-free preparations of rat liver indicate that of the plant growth retardants Phosfon B, Phosfon D, B995, COlI, and Amo 1618 all but B995 inhibit at least one step between acetate and mevalonate in cholesterol biosynthesis. The results also demonstrate that all of the retardants, including B995, inhibit at least one step between mevalonate and cholesterol, and that several of them act at different points along this part of the biosynthetic sequence.

scholarly journals (94) Efficacy of Application Methods and Concentration of Plant Growth Retardants on Growth of Chrysanthemum (Dendranthem ×grandiflorum `Cheasepeake')

HortScience ◽  
2005 ◽  
Vol 40 (4) ◽  
pp. 1046A-1046
Author(s):  
Chun Ho Pak ◽  
Seung Won Kang ◽  
Chiwon W. Lee
Keyword(s):  
Plant Growth ◽  
Plant Height ◽  
Nutrient Solution ◽  
Growth Retardation ◽  
Growth Retardant ◽  
Plant Production ◽  
Growth Retardants ◽  
Total Plant ◽  
Plant Growth Retardants ◽  
Application Methods

Efficacy of application methods and concentration of plant growth retardants on growth of chrysanthemum (Dendranthema ×grandiflorum cv. Cheasepeake) was tested. B-9 or cycocel (CCC) as a growth retardant was applied as drench or subapplication with nutrient solution. In the case of B-9 drench treatments, as B-9 concentrations increased, numbers of flowers and flower buds increased except in the 1500-ppm treatment. Increasing concentration of CCC also resulted in reduction of flower numbers, total plant height, total leaf area, branch number, and fresh weight. Reduction ratio of total plant height in 2000 ppm showed about 56.9% being compared to that of the 100-ppm drench treatment. B-9 or CCC, combined with nutrient solution, was also supplied from the C-channel subirrigation system. The B-9 subapplication treatment showed no significance among these concentrations, but flower numbers, total plant height, average plant height, and leaf numbers decreased as concentrations of CCC increased. B-9 or CCC with the same concentration was drenched after 2 weeks of the first experiment to compare planting time efficacy. Measured data increased until B-9 increased up to 2500 ppm and severe growth retardation resulted from the 5000-ppm treatment. Through this growth retardant application study, the combination of drenching concentration and period of plant growth regulators (PGRs) may result in effective growth retardation and reduction of application concentrations for pot plant production.

scholarly journals Plant Growth Retardants Affect Growth and Flowering of Achillea × ‘Coronation Gold’

2008 ◽  
Vol 26 (1) ◽  
pp. 24-28 ◽  
Author(s):  
J.R. Kessler ◽  
G.J. Keever
Keyword(s):  
Plant Growth ◽  
Growth Index ◽  
Plant Size ◽  
Growth Retardant ◽  
Growth Retardants ◽  
Shoot Height ◽  
Stage Of Development ◽  
Quality Ratings ◽  
Plant Growth Retardants

Abstract An experiment was conducted to determine the effects of several widely used plant growth retardants on plant size and flowering of Achillea × ‘Coronation Gold’. Plants in 10 cm (4 in) pots were grown in a greenhouse and treated with B-Nine at 0, 2550, 5100, or 7650 ppm; Cycocel at 0, 767, 1534, or 2301 ppm; B-Nine/Cycocel at 0, 1275/1534, 2550/1534, or 3825/1534 ppm; Sumagic at 0, 11, 22, 33, 44, or 55 ppm; Bonzi at 0, 32, 64, 96, 128, or 160 ppm; or Cutless at 0, 40, 80, or 120 ppm as a spray 1 week after vernalization. B-Nine, Cycocel, B-Nine/Cycocel, Sumagic, Bonzi, and Cutless reduced shoot height and growth index by 36 and 26%, 39 and 27%, 61 and 41%, 75 and 52%, 52 and 36%, and 75 and 51%, respectively, with the highest rate of each. B-Nine, Cycocel, B-Nine/Cycocel, and Sumagic, but not Bonzi or Cutless, increased the number of days to open inflorescence by 3-5 days with increasing rate. Sumagic, Bonzi, and Cutless reduced inflorescence diameter by up to 15, 18, and 14%, respectively but not B-Nine, Cycocel, or B-Nine/Cycocel. The highest quality ratings of 2.8 to 3.0 were found with B-Nine/Cycocel at 3825/1534 ppm, Sumagic at 22 and 33 ppm, and Bonzi at 64 ppm. Differences between the results in this study and earlier studies implicate the possible impact of differences in experimental environments, container size, or stage of development when the plant growth retardant treatments were applied.

scholarly journals Effect of Selected Growth Retardants on `Arabe' Grapevines

HortScience ◽  
1997 ◽  
Vol 32 (4) ◽  
pp. 602F-602
Author(s):  
Gonzalo Morales-Salazar ◽  
Jose P. Morales-Payan ◽  
Bielinski M. Santos
Keyword(s):  
Plant Growth ◽  
Dominican Republic ◽  
Active Ingredient ◽  
Vegetative Growth ◽  
Field Experiments ◽  
Growth Retardant ◽  
Regression Equations ◽  
Growth Retardants ◽  
Short Term ◽  
Plant Growth Retardants

The effect of three plant growth retardants, bitertanol, tradimefon, and hexaconazole, on short-term vine regrowth of pruned `Arabe' grape (Vitis vinifera) was studied in field experiments conducted in the Dominican Republic. Individual soil drench treatments of the three retardants were applied to adult pruned `Arabe' grape plants at rates 0, 0.25, 0.50, 0.75 and 1.00 g active ingredient per plant. Three weeks after treatment, bitertanol did not have a significant effect on vegetative growth, whereas triadimefon and hexaconazole caused significant reductions on vine regrowth. The effect of triadimefon as a growth retardant was stronger than that of hexaconazole, as described by regression equations Y = 30.88 - 25.68X for triadimefon, and Y = 32.9 - 15.2X for hexaconazole.

scholarly journals Efficacy of Plant Growth Retardants as Preplant Bulb Dips for Height Control in LA and Oriental Hybrid Lilies

2002 ◽  
Vol 12 (3) ◽  
pp. 426-431 ◽  
Author(s):  
Anil P. Ranwala ◽  
Garry Legnani ◽  
Mary Reitmeier ◽  
Barbara B. Stewart ◽  
William B. Miller
Keyword(s):  
Plant Growth ◽  
Effective Means ◽  
Lilium Longiflorum ◽  
Growth Retardant ◽  
Growth Retardants ◽  
Height Control ◽  
Commercial Plant ◽  
Leaf Yellowing ◽  
Plant Growth Retardants ◽  
High Concentrations

We evaluated preplant bulb dips in three commercial plant growth retardants [ancymidol (A-Rest), paclobutrazol (Bonzi), and uniconazole (Sumagic)] for height control in seven oriental hybrid lily (Lilium) cultivars (Aubade, Berlin, Casa Blanca, Muscadet, Sissi, Star Gazer, and Tom Pouce), and seven LA-hybrid lily [hybrids resulting from crosses between easter lily (Lilium longiflorum) and Asiatic hybrids] cultivars (Aladdin's Dazzle, Best Seller, Cebeco Dazzle, Royal Dream, Royal Parade, Royal Perfume, and Salmon Classic) grown in containers. A 1-min dip into a range of concentrations of each product was used to determine the optimum concentrations for height control. The results indicate that bulb dips, especially with uniconazole and paclobutrazol, can be a highly effective means of height control in hybrid lilies. Cultivars varied in their response to growth retardant treatments. In general, LA-hybrid lilies were much more responsive to the growth retardant treatments than oriental hybrids and required lower rates for comparable height control. Delays in flowering, increased bud abortion and leaf yellowing were observed only with high concentrations of uniconazole or paclobutrazol where the height reduction was also too excessive for a commercially acceptable crop.

scholarly journals Plant Growth Retardant Application to Achillea x ‘Coronation Gold’ and Gaura lindheimeri ‘Corrie's Gold’

2000 ◽  
Vol 18 (3) ◽  
pp. 149-153
Author(s):  
Stephanie E. Burnett ◽  
Gary J. Keever ◽  
Charles H. Gilliam ◽  
J. Raymond Kessler ◽  
Charles Hesselein
Keyword(s):  
Plant Growth ◽  
Untreated Control ◽  
Growth Suppression ◽  
Effective Concentration ◽  
Growth Retardant ◽  
Growth Retardants ◽  
Herbaceous Perennials ◽  
Quality Ratings ◽  
Plant Growth Retardants ◽  
Delayed Flowering

Abstract In two experiments conducted under nursery conditions in 1998 and 1999, the herbaceous perennials, Achillea x ‘Coronation Gold’ and Gaura lindheimeri ‘Corrie's Gold’ were treated with one of four plant growth retardants (PGRs): B-Nine at 2,500, 5,000, or 7,500 ppm; Bonzi at 33, 66, or 99 ppm; Cutless at 50, 100, or 150 ppm; Pistill at 500 or 1,000 ppm; or left untreated. Only Pistill delayed flowering of achillea while Bonzi and Cutless accelerated flowering of achillea. In 1998, B-Nine provided little growth suppression of achillea; however in 1999, when plants were pruned just prior to treatment and thus less reproductively developed, height at the most effective concentration of 7,500 ppm was reduced 33% compared to untreated plants over the duration of the experiment. At the most effective concentration of 99 ppm, Bonzi retarded growth 15% and 31%, over the duration of the experiment, while Cutless at 150 ppm suppressed growth 21% and 46% in 1998 and 1999, respectively, compared to an untreated control. Plants treated with the most effective concentration of Pistill were 13% and 21% shorter than non-treated plants over the duration of the experiment in 1998 and 1999, respectively. However, in 1998 quality ratings of Pistill-treated plants were lower than for control plants, and the duration of control was shorter than with B-Nine, Bonzi, or Cutless in 1999. Only Cutless provided consistent growth suppression of gaura; plants treated with the most effective concentration of 150 ppm were an average of 19% smaller at 60 days after treatment (DAT) in 1998 and 13% smaller than control plants from 28 to 70 DAT in 1999. B-Nine and Pistill provided more transitory control. In 1999, the most effective concentration of B-Nine suppressed growth 9% from 28 to 56 DAT. Plants treated with the most effective concentration of Pistill of 500 ppm averaged 23% smaller at 14 and 28 DAT than control plants. Application of Pistill delayed flowering 11 to 13 days in 1998.

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