scholarly journals THE EFFECTS OF BENZYLAMINOPURINE AND CHLORFLURENOL ON SEEDLING MORPHOLOGY OF FOUR CONIFER SPECIES

HortScience ◽  
1990 ◽  
Vol 25 (4) ◽  
pp. 399h-399
Author(s):  
Gerald A. Tuskan ◽  
Emile J. Poisson ◽  
Wayne A. Sargent
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Ponderosa Pine ◽  
Synergistic Effects ◽  
Seedling Morphology ◽  
Morphological Response ◽  
Nursery Stock ◽  
Reduced Height ◽  
Four Levels

Benzylaminopurine and chlorflurenol were applied to 2-1 nursery stock of Scots pine and ponderosa pine and 2-0 nursery stock Colorado blue spruce and Black Hills spruce to determine if crown morphology was influenced by varying combinations of the two plant growth regulators. Four levels of benzylaminopurine, 0, 250, 750 and 1250 ppm, and two chlorflurenol levels, 0 and 1% (v/v) were tested. Morphological response to treatments was significantly enhanced when treatments were applied to open, elongating buds. Benzylaminopurine significantly increased bud and shoot formation, while chlorflurenol significantly reduced height and increased branch length at species dependent concentrations. The two plant growth regulators lacked positive synergistic effects.

scholarly journals THE EFFECTS OF BENZYLAMINOPURINE AND CHLORFLURENOL ON SEEDLING MORPHOLOGY OF FOUR CONIFER SPECIES

HortScience ◽  
1990 ◽  
Vol 25 (4) ◽  
pp. 399H-399
Author(s):  
Gerald A. Tuskan ◽  
Emile J. Poisson ◽  
Wayne A. Sargent
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Ponderosa Pine ◽  
Synergistic Effects ◽  
Seedling Morphology ◽  
Morphological Response ◽  
Nursery Stock ◽  
Reduced Height ◽  
Four Levels

Benzylaminopurine and chlorflurenol were applied to 2-1 nursery stock of Scots pine and ponderosa pine and 2-0 nursery stock Colorado blue spruce and Black Hills spruce to determine if crown morphology was influenced by varying combinations of the two plant growth regulators. Four levels of benzylaminopurine, 0, 250, 750 and 1250 ppm, and two chlorflurenol levels, 0 and 1% (v/v) were tested. Morphological response to treatments was significantly enhanced when treatments were applied to open, elongating buds. Benzylaminopurine significantly increased bud and shoot formation, while chlorflurenol significantly reduced height and increased branch length at species dependent concentrations. The two plant growth regulators lacked positive synergistic effects.

scholarly journals Effect of Plant Growth Regulators on Flowering and Postproduction of Curcuma Alismatifolia `Chiang Mai Pink'

HortScience ◽  
2000 ◽  
Vol 35 (4) ◽  
pp. 563B-563a ◽  
Author(s):  
Mauricio J. Sarmiento ◽  
Jeff S. Kuehny
Keyword(s):  
Plant Growth ◽  
Plant Height ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Chiang Mai ◽  
Reduced Height ◽  
Potted Plant

Curcuma alismatifolia `Chiang Mai Pink' is a tropical perennial from the Zingiberaceae family with attractive flowers that make it useful as potted plant. Curcuma alismatifolia produces a tall inflorescence resulting in an unmarketable plant due to excessive height. Rhizomes of C. alismatifolia were soaked for 10 minutes in GA at concentrations of 0, 100, 200 or 500 ppm. The same plants were drenched with paclobutrazol at 0, 2, 3 or 4 mg a.i./container when shoots were 10 cm. GA significantly delayed rhizome emergence and flowering and reduced flower height. Paclobutrazol significantly reduced height; however, greater concentrations must be applied to obtain a marketable plant height. Number of flowering stems, postproduction life, and postproduction stretching were not affected by GA or paclobutrazol. Curcuma alismatifolia had an excellent postproduction life (4.64 ± 0.28 weeks) with little postproduction stretching (2.27 ± 0.38 cm).

scholarly journals Persistent Effects of Plant Growth Regulators on Landscape Performance of Seed Geraniums

1994 ◽  
Vol 12 (3) ◽  
pp. 150-154
Author(s):  
Joyce G. Latimer ◽  
Sherrod A. Baden
Keyword(s):  
Plant Growth ◽  
Plant Height ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Dry Weight ◽  
Stem Length ◽  
Shoot Dry Weight ◽  
Landscape Performance ◽  
Reduced Height ◽  
Time Required

Abstract In 1988, spray applications of 3.5 or 7 ppm paclobutrazol, 1500 ppm chlormequat, or 200 ppm ancymidol were applied to seed geraniums (Pelargonium x hortorum L. H. Bailey ‘Ringo White’ and ‘Ringo Rose’) to determine effects on growth in the greenhouse and the subsequent growth and performance of treated plants in the landscape. All growth retardants reduced stem length and shoot dry weight as well as time required for flowering, while branching was increased relative to the untreated plants. Flowering in the landscape was increased by all growth regulator treatments at 4 weeks after planting but was generally not different from the untreated plants at 6 weeks after planting. Plant height and width were reduced by all treatments for both cultivars, relative to untreated plants, at 4 weeks after planting. However, only 7 ppm paclobutrazol reduced height and width of ‘Ringo White’ plants at 6 weeks after planting. Plant height, but not width, was reduced by all treatments for ‘Ringo Rose’ at 6 weeks after planting. In 1989, seedlings of ‘Ringo Rose’ were treated with 3.5, 7, 16, 40, or 80 ppm paclobutrazol or 1500 ppm chlormequat or 200 ppm ancymidol. Seedling growth was excessively reduced by 40 or 80 ppm paclobutrazol. Time required for flowering was not reduced by growth regulators in 1989. Landscape performance under conditions of excess rain was not improved by plant growth regulators and the height of plants treated with 16, 40 or 80 ppm paclobutrazol was still less than that of the untreated plants at 12 weeks after planting. Only chlormequat controlled plant growth in the greenhouse without delaying the resumption of growth in the landscape.

scholarly journals Effects of Cyclanilide and Benzyladenine Tank Mixes on Shoot Production and Growth of Three Woody Landscape Species during Production

2010 ◽  
Vol 28 (2) ◽  
pp. 91-95
Author(s):  
M.E. Farris ◽  
G.J. Keever ◽  
J.R. Kessler ◽  
J.W. Olive
Keyword(s):  
Plant Growth ◽  
Synergistic Effect ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Synergistic Effects ◽  
Growing Season ◽  
Shoot Development ◽  
Shoot Production ◽  
Nursery Production ◽  
North Lake

Abstract A study was conducted to determine if there were synergistic effects from applying two plant growth regulators (PGRs), cyclanilide (CYC) and benzyladenine (BA), with cytokinin properties on Rhaphiolepis sp. (L.) Lindl. ‘Conor’ and ‘Snow White’ (Indian hawthorn), Rhododendron L. ‘North Lake Beauty’ (azalea), and Ilex crenata Thunb. ‘Sky Pencil’ (Japanese holly) during nursery production. Foliar applications of 100 or 200 ppm CYC promoted new shoot development in all species, whereas 2500 ppm BA either had no effect or suppressed shoot development, except in one of two experiments when shoot development was promoted in holly. With no species was there a synergistic effect on shoot development from combining the two PGRs, even when both PGRs individually promoted new shoot development in holly. Indian hawthorn and holly developed transient symptoms of toxicity in response to CYC, BA, and CYC + BA combinations that had dissipated by the end of the growing season and had no lasting effects on plant quality.

Wheat regenerants in the system of rapid assessment of the effect of 24-epibrassinolide

Biomics ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 394-397
Author(s):  
Seldimirova O.A. ◽  
M.V. Bezrukova ◽  
N.N. Кruglova ◽  
F.М. Shakirova
Keyword(s):  
Plant Growth ◽  
Experimental Model ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Drought Resistance ◽  
Rapid Assessment ◽  
Immature Embryo ◽  
Model System ◽  
Wheat Cultivars ◽  
Experimental Model System

The influence of 24-epibrassinolide on the efficiency of regenerants obtained from embryonic calli formation was studied in wheat cultivars contrast for drought resistance. The possibility of using the experimental model system «immature embryo – embryonic callus – regenerant» in the rapid assessment of the effect of antistress plant growth regulators is shown.

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